Biological motion is the phenomenon of recognizing a human form out of moving point-light dots, where both bottom–up and top–down processing mechanisms have been reported. This study reviews available psychological and neuroscientific evidence, and it assesses attempts either to assimilate biological motion to other structure-from-motion cases or to include biological motion into a visual “social cognition” subsystem . While neither theoretical option seems to accommodate all relevant psychological results, the study proposes that (...) class='Hi'>biological motion may be an object recognition task, inside the framework of Pylyshyn’s sequence of data-driven and cognitive mechanisms. This implies that a bottom–up object construction out of two-dimensional stimulus information precedes a top–down, but emotionally significant categorization of a particular human movement. Recognition of biological motion may be an example of visual processing in general. (shrink)

Many studies have shown that about three biological motions can be maintained in working memory. However, no study has yet analyzed the difficulties of experiment materials used, which partially affect the ecological validity of the experiment results. We use the perspective of system anatomy to decompose BM, and thoroughly explore the influencing factors of difficulties of BMs, including presentation duration, joints to execute motions, limbs to execute motions, type of articulation interference tasks, and number of joints and planes involved (...) in the BM. We apply the change detection paradigm supplemented by the articulation interference task to measure the BM working memory capacity of participants. Findings show the following: the shorter the presentation duration, the less participants remembered; the more their wrist moved, the less accurate their memory was; repeating verbs provided better results than did repeating numerals to suppress verbal encoding; the more complex the BM, the less participants remembered; and whether the action was executed by the handed limbs did not affect the WMC. These results indicate that there are many factors that can be used to adjust BM memory load. These factors can help sports psychology professionals to better evaluate the difficulty of BMs, and can also partially explain the differences in estimations of BM WMC in previous studies. (shrink)

The ability to predict the actions of other agents is vital for joint action tasks. Recent theory suggests that action prediction relies on an emulator system that permits observers to use information about their own motor dynamics to predict the actions of other agents. If this is the case, then predictions for self-generated actions should be more accurate than predictions for other-generated actions. We tested this hypothesis by employing a self/other synchronization paradigm where prediction accuracy for recording of self-generated movements (...) was compared with prediction accuracy for other-generated movements. As expected, predictions were more accurate when the observer’s movement dynamics matched the movement dynamics of the recording. This is consistent with that idea that the observer’s movement dynamics influence the predictions they generate. (shrink)

Human articulated motion can be readily recognized robustly even from impoverished so-called point-light displays. Such sequence information is processed by separate visual processing channels recruiting different stages at low and intermediate levels of the cortical visual processing hierarchy. The different contributions that motion and form information make to form articulated, or biological, motion perception are still under investigation. Here we investigate experimentally whether and how specific spatio-temporal features, such as extrema in the motion energy or (...) maximum limb expansion, indicated by the lateral and longitudinal extension, constrain the formation of the representations of articulated body motion. In order to isolate the relevant stimulus properties we suggest a novel masking technique, which allows to selectively impair the ankle information of the body configuration while keeping the motion of the point-light locations intact. Our results provide evidence that maxima in feature channel representations, e.g., the lateral or longitudinal extension, define elemental features to specify key poses of biological motion patterns. These findings provide support for models which aim at automatically building visual representations for the cortical processing of articulated motion by identifying temporally localized events in a continuous input stream. (shrink)

Introduction: Advantageous effects of biological motion detection, a low-perceptual mechanism that allows the rapid recognition and understanding of spatiotemporal characteristics of movement via salient kinematics information, can be amplified when combined with motor imagery, i.e., the mental simulation of motor acts. According to Jeannerod’s neurostimulation theory, asynchronous firing and reduction of mu and beta rhythm oscillations, referred to as suppression over the sensorimotor area, are sensitive to both MI and action observation of BM. Yet, not many studies investigated (...) the use of BM stimuli using combined AO-MI tasks. In this study, we assessed the neural response in the form of event-related synchronization and desynchronization patterns following the observation of point-light-walkers and concordant MI, as compared to MI alone.Methods: Twenty right-handed healthy participants accomplished the experimental task by observing BM stimuli and subsequently performing the same movement using kinesthetic MI. We recorded an electroencephalogram with 32 channels and performed time-frequency analysis on alpha and beta frequency bands during the MI task. A two-way repeated-measures ANOVA was performed to test statistical significance among conditions and electrodes of interest.Results: The results revealed significant ERD/S patterns in the alpha frequency band between conditions and electrode positions. Post hoc comparisons showed significant differences between condition 1 and condition 3 over the left primary motor cortex. For the beta band, a significantly less difference in ERD patterns was detected only between condition 3 and condition 4.Discussion: Our results confirmed that the observation of BM combined with MI elicits a neural suppression, although just in the case of jumping. This is in line with previous findings of AO and MI eliciting a neural suppression for simulated whole-body movements. In the last years, increasing evidence started to support the integration of AOMI training as an adjuvant neurorehabilitation tool in Parkinson’s disease.Conclusion: We concluded that using BM stimuli in AOMI training could be promising, as it promotes attention to kinematic features and imitative motor learning. (shrink)

The purpose of the study was to compare the visuospatial decision-making error scores related to the perception of biological motion of individuals categorized as field dependent or field independent. A sample of 69 participants aged 18-27 years that included 33 males and 36 females completed the experiment. Cognitive style was assessed using the Group Embedded Figure Test. Perception of biological motion was evaluated using two different point-light stimuli developed from video images of a ballet dancer’s performance (...) of a correct and incorrect turn in the fifth position. The results showed that individuals classified as field independent made significantly fewer visuospatial processing errors. The findings are considered and discussed in relation to theoretical perspectives associated with both cognitive processing and cognitive style. (shrink)

Unless one embraces activities as foundational, understanding activities in mechanisms requires an account of the means by which entities in biological mechanisms engage in their activities—an account that does not merely explain activities in terms of more basic entities and activities. Recent biological research on molecular motors exemplifies such an account, one that explains activities in terms of free energy and constraints. After describing the characteristic “stepping” activities of these molecules and mapping the stages of those steps onto (...) the stages of the motors’ hydrolytic cycles, researchers pieced together from images of the molecules in different hydrolyzation states accounts of how the chemical energy in ATP is transformed in the constrained environments of the motors into the characteristic activities of the motors. We argue that New Mechanism’s standard set of analytic categories—entities, activities, and organization—should be expanded to include constraints and energetics. Not only is such an expansion required descriptively to capture research on molecular motors but, more importantly from a philosophical point of view, it enables a non-regressive account of activities in mechanisms. In other words, this expansion enables a philosophical account of mechanistic explanation that avoids a regress of entities and activities “all the way down.” Rather, mechanistic explanation bottoms out in constraints and energetics. (shrink)

Cicero could both orate and write a treatise on oratory. A dog can bark but he can’t write a tract on barking. If all typically symbol-using animals were suddenly obliterated, their realm of symbolic action would be correspondingly obliterated. The earth would be but a realm of planetary, geologic, meteorological motion, including the motions of whatever nonhuman biological organisms happened to survive. The realm of nonsymbolic motion needs no realm of symbolic action; but there could be no (...) symbolic action unless grounded in the realm of motion, the realm of motion having preceded the emergence of our symbol-using ancestors; and doubtless the time will come when motions go on after all our breed will have vanished. Kenneth Burke is now developing the implications of the position stated in the present essay. He is also editing his Symbolic of Motives, a work designed to complement his Grammar of Motives and Rhetoric of Motives. His contributions to Critical Inquiry are "In Response to Booth: Dancing with Tears in my Eyes" , "Post-Poesque Derivation of a Terministic Cluster" , "A Critical Load, Beyond that Door; or, Before the Ultimate Confrontation; or, When Thinking of Deconstructionist Structuralists; or, A Hermeneutic Fantasy" , and "Methodological Repression and/or Strategies of Containment" . The first section of " Motion/ Action" was presented at a symposium at New York University in May 1976 and will appear in a slightly altered version in the report of those proceedings, Psychoanalysis, Criticism, and Creativity: A French-American Dialogue. (shrink)

This book is an examination of the metaphysical systems of Margaret Cavendish and Anne Conway, who share many superficial similarities. By providing a detailed analysis of their views on substance, monism, self-motion, individuation, and identity over time, as well as causation, perception, and freedom, it demonstrates the interesting ways in which their accounts differ. Seeing their systems in tandem highlights the originality of each philosopher. In addition to providing the details of their metaphysical views, the book also shows how (...) they put these views to use: for Cavendish in grounding her natural philosophy and for Conway in developing her theodicy. The account of Cavendish is more naturalistic than current interpretations. It argues that God plays no substantive role in Cavendish’s philosophy. The book provides an account of Cavendish’s matter and her biological holism. It shows how sensitive and rational matter are expressed differently in different natural kinds. It provides the first account of Cavendish’s views on individuation and identity over time and a detailed account of her views on causation, arguing that nature is the only principal cause. The book also provides an account of Conway’s spiritual substance, arguing that it is a unique type of substance. It discusses Conway’s two types of motions and causation. In addition, a detailed account of her view of motion as a mode of body, and how it is transferred, is provided. Finally, the book concludes that Conway’s metaphysics and morality are inseparable and that she holds a type of perfectionism. (shrink)

The Stoic theory of recurrence is founded on Stoic biological and cosmological doctrines. This paper argues that these connections are far more elaborate and well-determined than generally assumed. Evidence from the Stoic theory of the motion of pneuma is brought to bear and a rival geometric model of time is supported against the standard linear and circular models supported by Salles and Long. The new ‘torus model’ is inspired by Alexander of Aphrodisias’ inquisitive questioning of what form the (...) peculiar motion of pneuma may possibly have and based on the evidence in which the Stoics discuss the simultaneous inward/outward motion of pneuma. A new perspective is offered as to what form this motion may take, which ultimately offers an insight into the mechanics of recurrence as also some of the long-standing paradoxes of recurrence. (shrink)

The popular conception of the Renaissance as a culture devoted to order and perfection does not account for an important characteristic of Renaissance art: many of the period's major works, including those by da Vinci, Erasmus, Michelangelo, Ronsard, and Montaigne, appeared as works-in-progress, always liable to changes and additions. In Perpetual Motion, Michel Jeanneret argues for a sixteenth century swept up in change and fascinated by genesis and metamorphosis. Jeanneret begins by tracing the metamorphic sensibility in sixteenth-century science and (...) culture. Theories of creation and cosmology, of biology and geology, profoundly affected the perspectives of leading thinkers and artists on the nature of matter and form. The conception of humanity (as understood by Pico de Mirandola, Erasmus, Rabelais, and others), reflections upon history, the theory and practice of language, all led to new ideas, new genres, and a new interest in the diversity of experience. Jeanneret goes on to show that the invention of the printing press did not necessarily produce more stable literary texts than those transmitted orally or as hand-printed manuscripts—authors incorporated ideas of transformation into the process of composing and revising and encouraged creative interpretations from their readers, translators, and imitators. Extending the argument to the visual arts, Jeanneret considers da Vinci's sketches and paintings, changing depictions of the world map, the mythological sculptures in the gardens of Prince Orsini in Bomarzo, and many other Renaissance works. More than fifty illustrations supplement his analysis. (shrink)

The desire to understand the mathematics of living systems is increasing. The widely held presupposition that the mathematics developed for modeling of physical systems as continuous functions can be extended to the discrete chemical reactions of genetic systems is viewed with skepticism. The skepticism is grounded in the issue of scientific invariance and the role of the International System of Units in representing the realities of the apodictic sciences. Various formal logics contribute to the theories of biochemistry and molecular biology (...) and genetics. Various paths of extension are invoked in these formal logics in order to express the information of biological apodicticism. Symbolizing the appropriate notations for invariant relations and for biological extensions of relations is fundamental to the exact generating functions of discrete algebraic biology. Aspects of philosophical perspectives of the relation scientific number systems are contrasted. The deep distinction between physical motion and biological motion is expressed in terms the roles of Aristotelian causes. The interior motion within perplex numbers is contrasted with the exterior motion of physical systems. The need for a new mathematics for biology is suggested. (shrink)

Although Aristotle's contribution to biology has long been recognized, there are many philosophers and historians of science who still hold that he was the great delayer of natural science, calling him the man who held up the Scientific Revolution by two thousand years. They argue that Aristotle never considered the nature of matter as such or the changes that perceptible objects undergo simply as physical objects; he only thought about the many different, specific natures found in perceptible objects. Against this (...) view, this book argues that Aristotle offers a systematic account of matter, motion, and the basic causal powers found in all physical objects. It argues that Aristotle not only sees all perceptible objects as sharing certain basic physical properties, but he also holds that perceptible objects have these physical properties because they are ultimately made from physical matter of one kind or another. Finally, it argues that for Aristotle the basic properties of matter, including the basic properties of the material elements, cannot be understood teleologically. (shrink)

Using Schelling's philosophy, Ben Woodard examines how an expanded form of naturalism changes how we conceive of the division between thought and world, mathematics and motion, sense and dynamics, experiment and materiality, as well as speculation and pragmatism. Nature, in Schelling's eyes, is not the great outdoors or some authentic pastoral realm, but the various powers, processes and tendencies which run through biology, chemistry, physics and the very possibility of thought itself.

Background: how mind functions is subject to continuing scientific discussion. A simplistic approach says that, since no convincing way has been found to model subjective experience, mind cannot exist. A second holds that, since mind cannot be described by classical physics, it must be described by quantum physics. Another perspective concerns mind's hypothesized ability to interact with the world of quanta: it should be responsible for reduction of quantum wave packets; physics producing 'Objective Reduction' is postulated to form the basis (...) for mind-matter interactions. This presentation describes results derived from a new approach to these problems. It is based on well-established biology involving physics not previously applied to the fields of mind, or consciousness studies, that of critical feedback instability. -/- Methods: 'self-organized criticality' in complexity biology places system loci of control at critical instabilities, physical properties of which, including information properties, are presented. Their elucidation shows that they can model hitherto unexplained properties of experience. -/- Results: All results depend on physical properties of critical instabilities. First, at least one feed-back or feed-forward loop must have feedback gain, g = 1: information flows round the loop impress perfect images of system states back on themselves: they represent processes of perfect self-observation. This annihilates system quanta: system excitations are instability fluctuations, which cannot be quantized. Major results follow: -/- 1. Information vectors representing criticality states must include at least one attached information loop denoting self-observation. -/- 2. Such loop structures are attributed a function, 'registering the state's own existence', explaining -/- a. Subjective 'awareness of one's own presence' -/- b. How content-free states of awareness can be remembered (Jon Shear) -/- c. Subjective experience of time duration (Immanuel Kant) -/- d. The 'witness' property of experience – often mentioned by athletes 'in the zone' -/- e. The natural association between consciousness and intelligence -/- This novel, physically and biologically sound approach seems to satisfactorily model subjectivity. -/- Further significant results follow: -/- 1. Registration of external information in excited states of systems at criticality reduces external wave-packets: the new model exhibits 'Objective Reduction' of wave packets. -/- 2. High internal coherence (postulated by Domash & Penrose) leading to a. Non-separable information vector bundles. b. Non-reductive states (Chalmers's criterion for experience). -/- 3. Information that is: a. encoded in coherence negentropy; b. non-digitizable, and therefore c. computationally without digital equivalent (posited by Penrose). -/- Discussion and Conclusions: instability physics implies anharmonic motion, preventing excitation quantization, and totally different from the quantum physics of simple harmonic motion at stability. Instability excitations are different from anything hitherto conceived in information science. They can model aspects of mind never previously treated, including genuine subjectivity, objective reduction of wave-packets, and inter alia all properties given above. (shrink)

The automatic tendency to anthropomorphize our interaction partners and make use of experience acquired in earlier interaction scenarios leads to the suggestion that social interaction with humanoid robots is more pleasant and intuitive than that with industrial robots. An objective method applied to evaluate the quality of human–robot interaction is based on the phenomenon of motor interference (MI). It claims that a face-to-face observation of a different (incongruent) movement of another individual leads to a higher variance in one’s own movement (...) trajectory. In social interaction, MI is a consequence of the tendency to imitate the movement of other individuals and goes along with mutual rapport, sense of togetherness, and sympathy. Although MI occurs while observing a human agent, it disappears in case of an industrial robot moving with piecewise constant velocity. Using a robot with human-like appearance, a recent study revealed that its movements led to MI, only if they were based on human prerecording (biological velocity), but not on constant (artificial) velocity profile. However, it remained unclear, which aspects of the human prerecorded movement triggered MI: biological velocity profile or variability in movement trajectory. To investigate this issue, we applied a quasi-biological minimum-jerk velocity profile (excluding variability in the movement trajectory as an influencing factor of MI) to motion of a humanoid robot, which was observed by subjects performing congruent or incongruent arm movements. The increase in variability in subjects’ movements occurred both for the observation of a human agent and for the robot performing incongruent movements, suggesting that an artificial human-like movement velocity profile is sufficient to facilitate the perception of humanoid robots as interaction partners. (shrink)

This paper offers a renewed construction grammar analysis of linguistic constructions in a diachronic perspective. The present theory, termedAgentive Cognitive Construction Grammar(AgCCxG), is informed byactive inference(AIF), a process theory for the comprehension of intelligent agency. AgCCxG defends the idea that language bear traces of non-linguistic, bodily-acquired information that reflects sémiotico-biological processes of energy exchange and conservation. One of the major claims of the paper is that embodied cognition has evolved to facilitate ontogenic mental alignment among humans. This is demonstrated (...) by the results of a corpus study in which the patterns of association between verbs, the particle UP and argument structure in Old and Middle English have been studied. The conclusion is that, similar to biological systems, the linguistic sign system displays patterns of equilibrium and non-equilibrium. In other words, while in Old English usage near equilibrium was reached through the use of a conservative set of constructional semiotic templates (attachment patterns), associated with motor modalities, Middle English displays high rates of randomness resulting in a less stable, yet distinct, system of constructional attachment. (shrink)

Etienne Gilson once observed that Aristotle never had a notion of "life" for, if he was not a mechanist, still less was he a vitalist. Gilson's point was, of course, that Aristotle did not consider life to be some sort of internal force, nor was he prepared to reduce life to mechanical motions. Aristotle avoided both the vitalist and mechanist extremes in his distinctive conception of life as the proper activity of those things which have within themselves a principle of (...) their own movement. Few concepts are more central to Aristotle's understanding of the cosmos than self-motion and few are more difficult to grasp. Certainly, this idea has a very long history associated with the development of biology within the Aristotelian tradition as well as with the study of physical motion in general. Further, this distinction between the moving and the self-moving has played an important role in the development of natural theology among Christian and Islamic thinkers of the Middle Ages. Clearly, this is an idea deserving close study both in the works of Aristotle as well as in the tradition to which those works gave rise. In this context, the essays collected by Gill and Lennox are a most welcome contribution to research on the Aristotelian tradition. (shrink)

While in medicine, comparison of the data supplied by a clinical syndrome with the data supplied by the biological system is used to arrive at the most accurate diagnosis, the same cannot be said of financial economics: the accumulation of statistical results that contradict the Brownian hypothesis used in risk modelling, combined with serious empirical problems in the practical implementation of the Black-Scholes-Merton model, the benchmark theory of mathematical finance founded on the Brownian hypothesis, has failed to change the (...) Brownian representation, which has endured for more than fifty years despite the extent of its invalidation by experience. Without any statistical foundations, one mathematical representation has become the established approach, acting in the minds of practitioners as a “prenotion” in the sense the word is used by Durkheim, i.e. a “schematic, summary representation” which has produced a kind of spontaneous epistemology. The question arises of the persistence of this mathematical representation, which has been the basis for every financial risk modelling approach: how can its long life be explained? How was this spontaneous epistemology formed, and why did it prove to be so persistent? To address this question and offer an answer, I will test the various dynamics of scientific knowledge used with reference to financial modelling. All these dynamics are specific ways of describing the relationship between knowledge of a phenomenon and the phenomenon itself. Observing that it is impossible for the positivist approach to solve the financial puzzle, I turn to the three principal postpositivist dynamics, developed by Kuhn, Lakatos and Quine. I shall try to make to speak these representations of science for financial research, in order to reflect on the dominance of the Brownian representation in finance. We shall see that none of the epistemologies examined can explain why the Brownian representation continues to be used in mathematical finance research. I shall then propose an alternative hypothesis, concerning a significant pervading mental model that has irrigated both academics and practitioners in the financial sector: the “principle of continuity” introduced into economics by Marshall in. I consider that this principle of continuity has become a “persistent idea” in the form of a viral approach to representations, and I give this persistent idea the metaphorical name of the “Brownian virus”. Then, to explain the spread of this Brownian virus through the financial sector, the contamination of financial practices by this mental representation founded on the principle of continuity, I introduce the concept of the “financial Logos”, a discourse that structures practices and organisations, calculations, prudential regulations and accounting standards, leading to a general financialisation of society from the 1980s onwards. (shrink)

This article reviews recent developments in experimental facial attractiveness research. It outlines the important social consequences of facial attractiveness in social life and briefly reviews the structural factors associated with attractiveness in both sexes taking a theoretical perspective largely influenced by evolutionary biology. The study discusses individual differences in preferences from this theoretical perspective. Attractiveness is also affected by aspects of the face that are manifestly not static. Facial motion and expression involve changing configurations of the face and the (...) execution of specific, discrete gestures that are likely to contribute to attractiveness and yet are largely neglected in the current literature. It shows how an evolutionary viewpoint is also useful when considering attractiveness judgments when expressive or dynamic cues are present in stimuli. (shrink)

In the following article, the author offers an interpretation of George Canguilhem’s thinly articulated concept “biological meaning.” As a way into the problem, the article begins with the question: how does “biological meaning” differ from other forms of meaning? That is to ask, if we are to hold that the mere physical/chemical mode of being of a stone differs from the biological mode of being of an organism, how do they differ in their meaning? In an effort (...) to supply an answer to this question, our author postulates that, when we consider the lived circumstances of the organism, the existential situation of living beings, their biological facticity, then we intuit a fundamental difference in the mode of being of the motions of billiard balls and those of organisms. Moreover, through the investigation into, on the one hand, the motions that take place in a living milieu and, on the other hand, the form of potentiality inherent in what we might call the motions of adaptation, the author offers a preliminary description of a meaning that might be uniquely biological. (shrink)

This article concerns the so-called irrigation system in the Timaeus’ biology (77a-81e), which replenishes our body’s tissues with resources from food delivered as blood. I argue that this system functions mainly by the natural like-to-like motion of the elements and that the circulation of blood is an important case study of Plato’s physics. We are forced to revise the view that the elements attract their like. Instead, similar elements merely tend to coalesce with each other in virtue of their (...) tactile features as the atomists describe. The notion of attraction is replaced with this notion of mere coalescence. I begin by outlining how blood is made from food. I then argue that an understanding of health and disease compels us to read Plato as if he were an atomist and to abandon the popular scholarly interpretations according to which the elements attract each other. (shrink)

In "The Indeterministic Character of Evolutionary Theory: No 'Hidden Variables Proof' But No Room for Determinism Either," Brandon and Carson (1996) argue that evolutionary theory is statistical because the processes it describes are fundamentally statistical. In "Is Indeterminism the Source of the Statistical Character of Evolutionary Theory?" Graves, Horan, and Rosenberg (1999) argue in reply that the processes of evolutionary biology are fundamentally deterministic and that the statistical character of evolutionary theory is explained by epistemological rather than ontological considerations. In (...) this paper I focus on the topic of mutation. By focusing on some of the theory and research on this topic from early to late, I show how quantum indeterminism hooks up to point mutations (via tautomeric shifts, proton tunneling, and aqueous thermal motion). I conclude with a few thoughts on some of the wider implications of this topic. (shrink)

Aristotle's voluminous writings on animals have often been marginalised in the history of philosophy. Providing the first full-length comprehensive account of Aristotle's biology, its background, content and influence, this Companion situates his study of living nature within his broader philosophy and theology and differentiates it from other medical and philosophical theories. An overview of empiricism in Aristotle's Historia Animalium is followed by an account of the general methodology recommended in the Parts of Animals. An account of the importance of Aristotle's (...) teleological perspective and the fundamental metaphysics of biological entities provides a basis for understanding living capacities, such as nutrition, reproduction, perception and self-motion, in his philosophy. The importance of Aristotle's zoology to both his ethics and political philosophy is highlighted. The volume explores in detail the changing interpretations and influences of Aristotle's biological works from antiquity to modern philosophy of science. It is essential for both students and scholars. (shrink)