_Postures of the Mind _was first published in 1985. Minnesota Archive Editions uses digital technology to make long-unavailable books once again accessible, and are published unaltered from the original University of Minnesota Press editions. Annette Baier develops, in these essays, a posture in philosophy of mind and in ethics that grows out of her reading of Hume and the later Wittgenstein, and that challenges several Kantian or analytic articles of faith. She questions the assumption that intellect has authority over (...) all human feelings and traditions; that to recognize order we must recognize universal laws—descriptive or prescriptive; that the essential mental activity is representing; and that mental acts can be analyzed into discrete basic elements, combined according to statable rules of synthesis. In the first group of essays—"Varieties of Mental Postures"—Baier evaluates the positions taken by philosophers ranging from Descartes to Dennett and Davidson. Among her topics are remembering, intending, realizing, caring, representing, changing one's mind, justifying one's actions and feelings, and having conflicting reasons for them. The second group of essays—"Varieties of Moral Postures" - explores the sort of morality we get when all of these capacities become reflective and self-corrective. Some deal with particular moral issues—our treatment of animals, our policies regarding risk to human life, our contractual obligations; others, with more general questions on the role of moral philosophers and the place of moral theory. These essays respond to the theories of Hobbes, Kant, Rawls, and MacIntyre, but Baier's most positive reaction is to David Hume; _Postures of the Mind _ affirms and cultivates his version of a moral reflection that employs feeling and tradition as well as reason. (shrink)

_Postures of the Mind _was first published in 1985. Minnesota Archive Editions uses digital technology to make long-unavailable books once again accessible, and are published unaltered from the original University of Minnesota Press editions. Annette Baier develops, in these essays, a posture in philosophy of mind and in ethics that grows out of her reading of Hume and the later Wittgenstein, and that challenges several Kantian or analytic articles of faith. She questions the assumption that intellect has authority over (...) all human feelings and traditions; that to recognize order we must recognize universal laws—descriptive or prescriptive; that the essential mental activity is representing; and that mental acts can be analyzed into discrete basic elements, combined according to statable rules of synthesis. In the first group of essays—"Varieties of Mental Postures"—Baier evaluates the positions taken by philosophers ranging from Descartes to Dennett and Davidson. Among her topics are remembering, intending, realizing, caring, representing, changing one's mind, justifying one's actions and feelings, and having conflicting reasons for them. The second group of essays—"Varieties of Moral Postures" - explores the sort of morality we get when all of these capacities become reflective and self-corrective. Some deal with particular moral issues—our treatment of animals, our policies regarding risk to human life, our contractual obligations; others, with more general questions on the role of moral philosophers and the place of moral theory. These essays respond to the theories of Hobbes, Kant, Rawls, and MacIntyre, but Baier's most positive reaction is to David Hume; _Postures of the Mind _ affirms and cultivates his version of a moral reflection that employs feeling and tradition as well as reason. (shrink)

Schumaker (philosophy, science and technology department, Rensselaer Polytechnic Institute) examines how the terms of posture encompass all the major disciplines and investigates a variety of philosophical topics: abstract thought, ...

One hundred and twenty-seven college students were recruited for an experimental investigation of the effect of body posture on religious attitudes. Roughly half of the participants were placed in lower, contractive body postures while the other half were placed in higher, expansive body postures. After five minutes in these postures, all were asked to fill out a measure of religious attitudes. As expected, participants in the lower, contractive positions expressed more agreement with conventional religious beliefs than those in the (...) higher, expansive positions. (shrink)

Cross-linguistic strategies for mapping lexical and spatial relations from body partonym systems to external object meronymies (as in English ‘table leg’, ‘mountain face’) have attracted substantial research and debate over the past three decades. Due to the systematic mappings, lexical productivity and geometric complexities of body-based meronymies found in many Mesoamerican languages, the region has become focal for these discussions, prominently including contrastive accounts of the phenomenon in Zapotec and Tzeltal, leading researchers to question whether such systems should be explained (...) as global metaphorical mappings from bodily source to target holonym or as vector mappings of shape and axis generated “algorithmically”. I propose a synthesis of these accounts in this paper by drawing on the species-specific cognitive affordances of human upright posture grounded in the reorganization of the anatomical planes, with a special emphasis on antisymmetrical relations that emerge between arm-leg and face-groin antinomies cross-culturally. Whereas Levinson argues that the internal geometry of objects “stripped of their bodily associations” (1994: 821) is sufficient to account for Tzeltal meronymy, making metaphorical explanations entirely unnecessary, I propose a more powerful, elegant explanation of Tzeltal meronymic mapping that affirms both the geometric-analytic and the global-metaphorical nature of Tzeltal meaning construal. I do this by demonstrating that the “algorithm” in question arises from the phenomenology of movement and correlative body memories—an experiential ground which generates a culturally selected pair of inverse contrastive paradigm sets with marked and unmarked membership emerging antithetically relative to the transverse anatomical plane. These relations are then selected diagrammatically for the classification of object orientations according to systematic geometric iconicities. Results not only serve to clarify the case in question but also point to the relatively untapped potential that upright posture holds for theorizing the emergence of human cognition, highlighting in the process the nature, origins and theoretical validity of markedness and double scope conceptual integration. (shrink)

The question of postures is a relatively recent concern for the actors involved in teacher education. It is important for the teacher educator to identify the postures he adopts so that the student teacher can learn to practice his profession independently and develop his professional singularity. In the same way, the mentor during the induction period, by adopting certain postures, plays a major role in the professional development of the beginning teacher. These aspects have been the subject of a doctoral (...) research conducted through a qualitative multiple-case study in a context of teacher induction. From the conversations between the mentors and the beginning teachers, several postures were identified. In addition, semi-structured interviews with the mentors revealed their conceptions relating to the accompaniment, which gave an orientation to the postures adopted. Once the theoretical framework of the accompaniment postures exposed, this paper states the link between these and the ethical principles underlying their practice, the vision of their role and their position towards the beginner. (shrink)

Inspired by Adriana Cavarero’s recent work on maternal inclinations as a postural term, the overall purpose of this article is to seek out a geometry of the educational relation that is alien to the masculine myth of the ‘economic man’. Drawing on Jan Masschelein and Maarten Simons’s critique of the marketization of education, reading their giving ‘shape and form’ to the scholastic school through the geometry of Cavarero’s ‘maternal inclinations’, the article shows how images and metaphors associated with the (...) class='Hi'>posture of rectitude infuse the scholastic model of the school. At the same time, we argue, it testifies to a geometry of an inclined subject and, in doing so, it offers an opening for recovering the significance of the feminine and maternal to educational theory. Affirming this opening, the paper makes a shift of emphasis from scholastic techniques to educational postures. (shrink)

POSTURES ET PRATIQUES DE L'HOMME Libéralisme, philosophie non-standard et pensée japonaise Jordanco SEKULOVSKI Nous, les sans-philosophie ASIE Japon -/- La philosophie véhicule des distinctions dualistes dont la conflictualité affaiblit gravement notre sentiment de solidarité humaine ; affronter la philosophie sur son propre terrain mène à une impasse, toute objection à son règne métaphysique devant, pour être reçue, se formuler dans les termes mêmes de la métaphysique... Il s'agit donc de changer de terrain, ou de chemin... L'auteur s'appuie sur le kâta (...) japonais qui forme la base des techniques de soi et façonne la pensée et les pratiques sociétales : une alternative crédible à la pensée-monde occidentale aujourd'hui dans l'impasse. -/- - format : 135 x 215 cm ISBN : 978-2-343-00792-2 • septembre 2013 • 222 pages EAN13 : 9782343007922 EAN PDF : 9782336322865. (shrink)

This article builds on collaborative research (observations, interviews, and writing and reflection workshops) conducted on Early Childhood Educators (ECEs). The text studies the inclusive education efforts of ECEs within early childhood centers. In this setting, the educational and care work carried out raises the question of encounters with others. Inclusive education places children, families, and ECE in liminal or in-between spaces. ECEs have to reconcile the similarities and differences between young children and their parents within early childhood centers. As a (...) result, certain points of rupture and convergence emerge between ECEs and families. The active involvement of ECEs appears to be a key component of this professional posture so conducive to inclusive education. (shrink)

Here, we describe how Casas Grandes Medio period (AD 1200 to 1450) shamanic practices of the North American Southwest used tobacco shamanism, a ritual stance called the Tennessee Diviner (TD) posture, and cultural expectations to generate trance experiences of soul flight and divination. We introduce a conceptual model that holds that specific trance experiences are the emergent result of human minds interacting with additional factors including entheogens, cultural expectations, physiological states, postures/movement, and sound/stimulation. Experimental and ethnographic evidence indicates initiating (...) trance with either tobacco intoxication or the TD posture accompanied with a rapidly beating drum or rattle corresponds with perceptions of soul flight, transformation, and divination/information acquisition. Both have similar results but pairing them together as they were during the Medio period likely helped ensure the culturally desired trance experiences. This practice of mutually reinforcing factors was likely part of tobacco‐based shamanism found in other New World cultures as well. We suggest our general model can be applied to other contexts to examine how various aspects of trance induction interact to produce the cultural patterns (and resulting cosmological and spiritual frameworks) anthropologists have documented in other cultures. (shrink)

Postural instability and balance impairment are disabling symptoms in patients with acute unilateral peripheral vestibular hypofunction. Vestibular rehabilitation is known to improve the vestibular compensation process, but its effect on posture recovery remains poorly understood, little is known about when VR must be done, and whether the degree of vestibular loss matters is uncertain. We analyzed posture control under static and dynamic postural tasks performed in different visual conditions [eye open ; eyes closed ; and optokinetic stimulation] using (...) dynamic posturography. Non-linear analyses of the postural performance were performed in two groups of patients with UVH subjected to the same VR program based on the unidirectional rotation paradigm and performed either early or later after vertigo attack. Distribution of the angular horizontal vestibulo-ocular reflex gain values recorded on the hypofunction side before rehabilitation differentiated two distinct sub-groups with aVOR gains below or above 0.20. The postural performance of the four sub-groups of patients with UVH tested before VR showed significantly altered postural parameters compared with healthy controls. Greater instability, higher energy to control posture, larger sway without feedback corrections, and lower time of automatic control of posture were observed in static conditions. The four sub-groups recovered near-normal postural performance after VR in the EO and EC conditions, but still exhibited altered postural performance with optokinetic stimulation. In dynamic posturography conditions and before VR, the percentage of patients able to perform the postural tasks with EC and optokinetic stimulation was significantly lower in the two sub-groups with aVOR gain <0.20. After VR, the improvement of the postural parameters depended on the stage of rehabilitation and the degree of vestibular hypofunction. The best balance function recovery was found in the sub-group with early VR and pre-rehabilitation aVOR gain above 0.20, the worst in the sub-group with late rehabilitation and aVOR gain below 0.20. These differences were seen when the vestibular input remains the main sensory cue to control balance, that is, on unstable support without vision or altered visual motion cues. These findings extend to dynamic balance recovery the crucial roles of early rehabilitation and degree of vestibular hypofunction which we have already highlighted for vestibulo-ocular reflex recovery. (shrink)

Body movement is a primary nonverbal communication channel in humans. Coordinated social behaviors, such as dancing together, encourage multifarious rhythmic and interpersonally coupled movements from which observers can extract socially and contextually relevant information. The investigation of relations between visual social perception and kinematic motor coupling is important for social cognition. Perceived coupling of dyads spontaneously dancing to pop music has been shown to be highly driven by the degree of frontal orientation between dancers. The perceptual salience of other aspects, (...) including postural congruence, movement frequencies, time‐delayed relations, and horizontal mirroring remains, however, uncertain. In a motion capture study, 90 participant dyads moved freely to 16 musical excerpts from eight musical genres, while their movements were recorded using optical motion capture. A total from 128 recordings from 8 dyads maximally facing each other were selected to generate silent 8‐s animations. Three kinematic features describing simultaneous and sequential full body coupling were extracted from the dyads. In an online experiment, the animations were presented to 432 observers, who were asked to rate perceived similarity and interaction between dancers. We found dyadic kinematic coupling estimates to be higher than those obtained from surrogate estimates, providing evidence for a social dimension of entrainment in dance. Further, we observed links between perceived similarity and coupling of both slower simultaneous horizontal gestures and posture bounding volumes. Perceived interaction, on the other hand, was more related to coupling of faster simultaneous gestures and to sequential coupling. Also, dyads who were perceived as more coupled tended to mirror their pair's movements. (shrink)

This study is to explore the gesture recognition and behavior tracking in swimming motion images under computer machine vision and to expand the application of moving target detection and tracking algorithms based on computer machine vision in this field. The objectives are realized by moving target detection and tracking, Gaussian mixture model, optimized correlation filtering algorithm, and Camshift tracking algorithm. Firstly, the Gaussian algorithm is introduced into target tracking and detection to reduce the filtering loss and make the acquired motion (...) posture more accurate. Secondly, an improved kernel-related filter tracking algorithm is proposed by training multiple filters, which can clearly and accurately obtain the motion trajectory of the monitored target object. Finally, it is proposed to combine the Kalman algorithm with the Camshift algorithm for optimization, which can complete the tracking and recognition of moving targets. The experimental results show that the target tracking and detection method can obtain the movement form of the template object relatively completely, and the kernel-related filter tracking algorithm can also obtain the movement speed of the target object finely. In addition, the accuracy of Camshift tracking algorithm can reach 86.02%. Results of this study can provide reliable data support and reference for expanding the application of moving target detection and tracking methods. (shrink)

Remise en cause de la théorie d’Einstein, de celle de Darwin, créationnisme et fondamentalismes, cosmologies païennes, mouvements technofascistes, idéologies radicales anti-science… Pourquoi des personnes formées à la science en viennent-elles à adopter une attitude en opposition virulente à la science de leur époque? Comment mobilisent-elles leur capacité de raisonnement au service de dogmes et d’idéologies sans rapport avec la science? Peut-on tirer un fil historique entre ces postures depuis la naissance de la science moderne au XVIe siècle? De nos jours, (...) quel est l’impact sur les rapports entre science et société de ces attitudes, diffusées et multipliées par le canal de l’Internet? Rejet de la science contemporaine, de la spécialisation et de l’abstraction mathématique ; appel au bon sens et à une science globale ; vitupération pouvant aller jusqu’à l’invocation de la théorie du complot ; instrumentalisation de la science à des fins idéologiques ou religieuses : voilà les principales caractéristiques des mouvements ou des individus étudiés dans cet ouvrage. Alexandre Moatti, ingénieur en chef des Mines, est chercheur associé en histoire des sciences et des idées à l’université Paris-VII-Denis-Diderot. Il est notamment l’auteur deEinstein, un siècle contre lui (2007). (shrink)

Based on our empirical research on global meaning in people with spinal cord injury and people with stroke, we formulated ‘inner posture’ as a concept in rehabilitation. Inner posture, as we concluded from our empirical data, refers to the way in which people bear what cannot be changed. It helps them to live with their injury. Considering that much has already been written about meaning from a variety of disciplines, the question arises whether the concept of inner (...) class='Hi'>posture adds something new to the existing literature, or is just another name for a phenomenon that has already been described before in different terms. In this paper, we aim to investigate this and to clarify our conceptualization, by comparing the concept of inner posture with influential concepts in healthcare literature which seem to be more or less related. In the work of Puchalski regarding spirituality, Pargament regarding religion, Eliott regarding hope and Frankl regarding attitude, we found definitions and descriptions that seemed to come close to the phenomenon we refer to as inner posture. Because these concepts have various theoretical backgrounds, the comparison can help to better understand our concept of inner posture, through a process of dialogue between traditions, following Gadamer’s notion of dialogue as fusion of horizons of understanding. We conclude that inner posture differs from the other concepts in several ways. Some of these differences are more fundamental, other are partial. This suggests that we identified a new perspective on a phenomenon partially described earlier. The comparison also inspired us to slightly adjust our definition and to formulate new research questions. (shrink)

IntroductionAlthough a few studies suggest that young overweight to obese children and adolescents may have impaired postural control compared to young normal-weight peers, little information exists about how these two groups differ in the quality of the underlying balance strategies employed. Hence, the aim of the present study was a first comprehensive examination of the structural complexity of postural sways in these two cohorts during quiet bilateral standing.MethodsNineteen YO secondary school students were carefully matched to YN controls for age, sex, (...) height, and school. Mediolateral and anteriorposterior acceleration signals were recorded with an inertial measurement unit positioned at the trunk while standing barefoot in two conditions: firm and foam support surface. The magnitude of postural fluctuations was obtained using the root mean square. The temporal structure of the signals was analyzed via sample entropy, largest Lyapunov exponent, and detrended fluctuation analysis algorithm. Reliability was assessed using a test–retest design.ResultsIn both groups, foam standing caused higher postural fluctuations and reduced structural complexity. In comparison to YN, YO exhibited a higher RMSAP. Especially in ML direction, the acceleration signals of the YO had higher repeatability, greater long-range correlations, and lower local stability. However, these observations were largely independent of the task difficulty. Except for α-DFAAP, the IMU approach proved reliable to characterize posture control.DiscussionOur outcomes confirm postural control deficits in YO compared to their YN peers and indicate impaired regulatory mechanisms reflected as rigidity. Such less complex patterns usually reflect diverse pathologies, are detrimental to compensate for internal or external perturbations, and are attributed to lower adaptability and task performance. Without targeted balance stimuli, YO likely end in a lifelong vicious circle of mutually dependent poor balance regulation and low physical activity. (shrink)

On peut voir l’apparition de la radicalité politique contemporaine avec l’émergence de l’Internationale situationniste et sa lecture du marxisme. Celle-ci, fortement influencée par Lukacs, Korsch, mais aussi Lefèbvre, et en réaction à Althusser, s’appuie néanmoins sur les textes de l’Idéologie allemande et s’engouffre dans la faille « épistémologique » séparant les deux Marx. Les postures de la radicalité qui en découlent, s’appuient sur la centralité sociale et anthropologique du travail don...

On peut voir l’apparition de la radicalité politique contemporaine avec l’émergence de l’Internationale situationniste et sa lecture du marxisme. Celle-ci, fortement influencée par Lukacs, Korsch, mais aussi Lefèbvre, et en réaction à Althusser, s’appuie néanmoins sur les textes de l’Idéologie allemande et s’engouffre dans la faille « épistémologique » séparant les deux Marx. Les postures de la radicalité qui en découlent, s’appuient sur la centralité sociale et anthropologique du travail don...

RESUMO Recorrendo a reflexões de Alain Rabatel sobre pontos de vista e responsabilidade enunciativa, principalmente aquelas contidas em Homo narrans (2016; 2021), buscamos descrever e interpretar a gestão dos dialogismos interno e interdiscursivo na introdução da encíclica Deus caritas est (2005), assinada pelo então papa Bento XVI, por meio da análise de posturas enunciativas. Nossa principal conclusão é a de que o locutor primário (L1) gere o dialogismo do texto, primeiramente, a partir da subenunciação e, posteriormente, por meio da coenunciação (...) e mesmo da sobre-enunciação. L1 convoca parte da responsabilidade enunciativa e se associa ao ponto de vista do Novo Testamento enquanto sugere uma atualização do Velho Testamento. Nos nossos termos, o Velho que manda é destituído a favor do Novo que ama - isto é, o amor cristão-católico. Esta investigação se afilia a uma agenda de pesquisa ampla, e em curso, de análise do discurso pontifício moderno. (shrink)

Recent research on body and head positions has shown that postural changes may induce varying degrees of changes on acoustic speech signals and articulatory gestures. While the preservation of formant profiles across different postures is suitably accounted for by the two-tube model and perturbation theory, it remains unclear whether it is resulted from the accommodation of tongue postures. Specifically, whether the tongue accommodates the changes in head angle to maintain the target acoustics is yet to be determined. The present study (...) examines vowel acoustics and their correspondence with the articulatory maneuvers of the tongue, including both tongue postures and movements of the tongue center, across different head angles. The results show that vowel acoustics, including pitch and formants, are largely unaffected by upward or downward tilting of the head. These preserved acoustics may be attributed to the lingual gestures that compensate for the effects of gravity. Our results also reveal that the tongue postures in response to head movements appear to be vowel-dependent, and the tongue center may serve as an underlying drive that covariates with the head angle changes. These results imply a close relationship between vowel acoustics and tongue postures as well as a target-oriented strategy for different head angles. (shrink)

Objective: Stand-to-sit task is an important daily function, but there is a lack of research evidence on whether knee osteoarthritis affects the postural balance during the task. This study aimed to compare individuals with knee OA and asymptomatic controls in postural balance and identify kinematic and lower extremity muscle activity characteristics in individuals with knee OA during the stand-to-sit task.Methods: In total, 30 individuals with knee OA and 30 age-matched asymptomatic controls performed the 30-s Chair Stand Test at self-selected speeds. (...) Motion analysis data and surface electromyography were collected while participants performed the 30sCST. To quantify postural balance, the displacement of the center of mass and the peak instantaneous velocity of the CoM were calculated. The kinematic data included forward lean angles of the trunk and pelvic, range of motion of the hip, knee, and ankle joints in the sagittal plane. The averaged activation levels of gluteus maximus, vastus lateralis, vastus medialis, rectus femoris, biceps femoris, tibialis anterior, and medial head of gastrocnemius muscles were indicated by the normalized root mean square amplitudes.Results: Compared with the asymptomatic control group, the knee OA group prolonged the duration of the stand-to-sit task, demonstrated significantly larger CoM displacement and peak instantaneous CoM velocity in the anterior-posterior direction, reduced ankle dorsiflexion RoM, greater anterior pelvic tilt RoM, and lower quadriceps femoris and muscles activation level coupled with higher BF muscle activation level during the stand-to-sit task.Conclusion: This study indicates that individuals with knee OA adopt greater pelvic forward lean RoM and higher BF muscle activation level during the stand-to-sit task. However, these individuals exist greater CoM excursion in the anterior-posterior direction and take more time to complete the task. This daily functional activity should be added to the rehabilitation goals for individuals with knee OA. The knee OA group performs reduced ankle dorsiflexion RoM, quadriceps femoris, and TA activation deficit. In the future, the rehabilitation programs targeting these impairments could be beneficial for restoring the functional transfer in individuals with knee OA. (shrink)

ObjectiveAre people with a characteristically large physiological sway rendered particularly unstable when standing on a moving surface? Is postural sway in standing individuals idiosyncratic? In this study, we examine postural sway in individuals standing normally, and when subtle continuous sinusoidal disturbances are applied to their support platform. We calculate consistency between conditions to verify if sway can be considered characteristic of each individual. We also correlate two different aspects of participants’ responses to disturbance; their sway velocity and their regulation of (...) body orientation.MethodsNineteen healthy adults (age 29.2 ± 3.2 years) stood freely on footplates coaxially aligned with their ankles and attached to a motorized platform. They had their eyes closed, and hips and knees locked with a light wooden board attached to their body. Participants either stood quietly on a fixed platform or on a slowly tilting platform (0.1 Hz sinusoid; 0.2 and 0.4 deg). Postural sway size was separated into two entities: (1) the spontaneous sway velocity component (natural random relatively rapid postural adjustments, RMS body angular velocity) and (2) the evoked tilt gain component (much slower 0.1 Hz synchronous tilt induced by the movement of the platform, measured as peak-to-peak (p-p) gain, ratio of body angle to applied footplate rotation).ResultsThere was no correlation between the velocity of an individual’s sway and their evoked tilt gain (r= 0.34,p= 0.15 andr= 0.30,p= 0.22). However, when considered separately, each of the two measurements showed fair to good absolute agreement within conditions. Spontaneous sway velocity consistently increased as participants were subjected to increasing disturbance. Participants who swayed more (or less) did so across all conditions [ICC(3,k)= 0.95]. Evoked tilt gain also showed consistency between conditions [ICC(3,k)= 0.79], but decreased from least to most disturbed conditions.ConclusionThe two measurements remain consistent between conditions. Consistency between conditions of two very distinct unrelated measurements reflects the idiosyncratic nature of postural sway. However, sway velocity and tilt gain are not related, which supports the idea that the short-term regulation of stability and the longer-term regulation of orientation are controlled by different processes. (shrink)

Previous works usually report greater postural stability in precise visual tasks than in stationary-gaze tasks. However, existing cognitive models do not fully support these results as they assume that performing an attention-demanding task while standing would alter postural stability because of the competition of attention between the tasks. Contrary to these cognitive models, attentional resources may increase to create a synergy between visual and postural brain processes to perform precise oculomotor behaviors. To test this hypothesis, we investigated a difficult searching (...) task and a control free-viewing task. The precise visual task required the 16 young participants to find a target in densely furnished images. The free-viewing task consisted of looking at similar images without searching anything. As expected, the participants exhibited significantly lower body displacements and a significantly higher cognitive workload in the precise visual task than in the free-viewing task. Most important, our exploration showed functional synergies between visual and postural processes in the searching task, that is, significant negative relationships showing lower head and neck displacements to reach more expended zones of fixation. These functional synergies seemed to involve a greater attentional demand because they were not significant anymore when the cognitive workload was controlled. In the free-viewing task, only significant positive relationships were found and they did not involve any change in cognitive workload. An alternative cognitive model and its potential subtended neuroscientific circuit are proposed to explain the supposedly cognitively grounded functional nature of vision–posture synergies in precise visual tasks. (shrink)

In the following article, starting from a progressive understanding of his own subjectivity, a determining factor in developing his capacity to listen to adolescents, the author puts forward the hypothesis that a professional position he describes as "in-between" requires rigor and flexibility, enabling professionals to remain permeable to the unconscious mobilizations of the adolescent-subjects as well as to his own. The author will draw on the results of a longitudinal, partnership-based study that he conducted with ten adolescents, from 2015 to (...) 2020, involving a team of specialized prevention educators. More specifically, the author will retrospectively analyze some excerpts from his encounter with one of the teenagers to reveal possible ways in which a "professional of the social bond" might adopt a rigorous in-between position. (shrink)

Postural instability in Parkinson’s disease (PD) is characterized by impaired postural responses to transient perturbations, increased postural sway in stance and difficulty transitioning between tasks. In addition, some studies suggest that loss of dopamine in the basal ganglia due to PD results in difficulty using proprioceptive information for motor control. Here, we quantify the ability of subjects with PD and age-matched control subjects to use and re-weight sensory information for postural control during steady-state conditions of continuous rotations of the stance (...) surface or visual surround. We measure the postural sway of subjects in response to a pseudorandom, surface-tilt stimulus with eyes closed, and in response to a pseudorandom, visual-tilt stimulus. We use a feedback control model of the postural control system to interpret our results, focusing on sensory weighting as a function of stimulus amplitude. We find that subjects with PD can re-weight their dependence upon sensory information in response to changes in surface- or visual-stimulus amplitude. Specifically, subjects with PD behaved like age-matched control subjects by decreasing proprioceptive contribution to stance control with increasing surface-tilt amplitude, and decreasing visual contribution with increasing visual-tilt amplitude. However, subjects with PD do not decrease their reliance on proprioception as much as age-matched controls for small increases in surface-stimulus amplitudes. Levodopa medication did not affect sensory re-weighting behaviors for postural control. The impairment in PD subject’s ability to respond differently to small changes in surface rotation amplitudes is consistent with an increased threshold for perceiving proprioceptive signals, which may result from decreased signal-to-noise in the dopaminergic pathways associated with sensory processing and/or sensory integration. (shrink)

In traditional 3D reconstruction methods, using a single view to predict the 3D structure of an object is a very difficult task. This research mainly discusses human pose recognition and estimation based on 3D multiview basketball sports dataset. The convolutional neural network framework used in this research is VGG11, and the basketball dataset Image Net is used for pretraining. This research uses some modules of the VGG11 network. For different feature fusion methods, different modules of the VGG11 network are used (...) as the feature extraction network. In order to be efficient in computing and processing, the multilayer perceptron in the network model is implemented by a one-dimensional convolutional network. The input is a randomly sampled point set, and after a layer of perceptron, it outputs a feature set of n × 16. Then, the feature set is sent to two network branches, one is to continue to use the perceptron method to generate the feature set of n × 1024, and the other network is used to extract the local features of points. After the RGB basketball sports picture passes through the semantic segmentation network, a picture containing the target object is obtained, and the picture is input to the constructed feature fusion network model. After feature extraction is performed on the RGB image and the depth image, respectively, the RGB feature, the local feature of the point cloud, and the global feature are spliced and fused to form a feature vector of N × 1152. There are three branches for this vector network, which, respectively, predict the object position, rotation, and confidence. Among them, the feature dimensionality reduction is realized by one-dimensional convolution, and the activation function is the ReLU function. After removing the feature mapping module, the accuracy of VC-CNN_v1 dropped by 0.33% and the accuracy of VC-CNN_v2 dropped by 0.55%. It can be seen from the research results that the addition of the feature mapping module improves the recognition effect of the network to a certain extent. (shrink)