The present work critically examines two assumptions frequently stated by supporters of cognitive neuroenhancement. The first, explicitly methodological, assumption is the supposition of effective and side effect-free neuroenhancers. However, there is an evidence-based concern that the most promising drugs currently used for cognitive enhancement can be addictive. Furthermore, this work describes why the neuronal correlates of key cognitive concepts, such as learning and memory, are so deeply connected with mechanisms implicated in the development and maintenance of addictive behaviour so that (...) modification of these systems may inevitably run the risk of addiction to the enhancing drugs. Such a potential risk of addiction could only be falsified by in-depth empirical research. The second, implicit, assumption is that research on neuroenhancement does not pose a serious moral problem. However, the potential for addiction, along with arguments related to research ethics and the potential social impact of neuroenhancement, could invalidate this assumption. It is suggested that ethical evaluation needs to consider the empirical data as well as the question of whether and how such empirical knowledge can be obtained. (shrink)
Contemporary psychiatry is becoming more biologically oriented in the attempt to elicit a biological rationale of mental diseases. Although mental disorders comprise mostly functional abnormalities, there is a substantial overlap between neurology and psychiatry in addressing cognitive disturbances. In schizophrenia, the presence of cognitive impairment prior to the onset of psychosis and early after its manifestation suggests that some neurocognitive abnormalities precede the onset of psychosis and may represent a trait marker. These cognitive alterations may arise from functional disconnectivity, as (...) no significant brain damage has been found. In this review we aim to revise A.R. Luria’s systematic approach used in the neuropsychological evaluation of cognitive functions, which was primarily applied in patients with neurological disorders and in the cognitive evaluation in schizophrenia and other related disorders. As proposed by Luria, cognitive processes, associated with higher cortical functions, may represent functional systems that are not localized in narrow, circumscribed areas of the brain, but occur among groups of concertedly working brain structures, each of which makes its own particular contribution to the organization of the functional system. Current developments in neuroscience provide evidence of functional connectivity in the brain. Therefore, Luria’s approach may serve as a frame of reference for the analysis and interpretation of cognitive functions in general and their abnormalities in schizophrenia in particular. Having said that, modern technology, as well as experimental evidence, may help us to understand the brain better and lead us towards creating a new classification of cognitive functions. In schizophrenia research, multidisciplinary approaches must be utilized to address specific cognitive alterations. The relationships among the components of cognitive functions derived from the functional connectivity of the brain may provide an insight into cognitive machinery. (shrink)
Patients suffering from mental disorders are often not treated on an equal basis with patients suffering from organic diseases. In Germany, for example, alcohol-dependent patients will be detoxified on a clinical ward to ensure that they survive acute alcohol withdrawal; however, medical insurances often do not cover treatment costs for a therapy for the addictive behavior that underlies the acute alcohol problem. While patients suffering from diabetes mellitus can also display personally harmful choices and, for example, consume sugar although they (...) know that this is detrimental for their health, medical insurances pay for the acute hyperglycemic shock treatment as well as for dietary and medical treatment of the .. (shrink)
Background: Prejudices against minorities can be understood as habitually negative evaluations that are kept in spite of evidence to the contrary. Therefore, individuals with strong prejudices might be dominated by habitual or “automatic” reactions at the expense of more controlled reactions. Computational theories suggest individual differences in the balance between habitual/model-free and deliberative/model-based decision-making.Methods: 127 subjects performed the two Step task and completed the blatant and subtle prejudice scale.Results: By using analyses of choices and reaction times in combination with computational (...) modeling, subjects with stronger blatant prejudices showed a shift away from model-based control. There was no association between these decision-making processes and subtle prejudices.Conclusion: These results support the idea that blatant prejudices toward minorities are related to a relative dominance of habitual decision-making. This finding has important implications for developing interventions that target to change prejudices across societies. (shrink)
In his critical comment on our paper in this journal, Shaw argues that ‘false assumptions’ which we have criticised are in fact correct . He suggests that the risk of addiction to neuroenhancers may not be relevant, and that safety and research in regard to neuroenhancement do not pose unique ethical problems. Here, we demonstrate that Shaw ignores key empirical research results, trivialises addiction, commits logical errors, confuses addictions and passions, argues on a speculative basis, and fails to distinguish the (...) specific ethical conditions of clinical research from those relevant for research in healthy volunteers. Therefore, Shaw's criticism cannot convince. (shrink)
Mental disorders have been suggested to differ from somatic diseases because they lack an organic correlate. We show that this argument is both empirically wrong and theoretically irrelevant, because diseases are defined by functional impairments and not biological variation. Due to human diversity, a multitude of functions can be defined, and any selection of medically relevant functional impairments is necessarily value-based. We suggest that such values include individual survival and living in a shared world with others, and that their definition (...) requires public debate and a critical reflection by Philosophical Anthropology. However, the presence of functional impairments that are generally relevant for human life and survival only fulfils the so-called disease criterion, which is necessary but not sufficient to diagnose a clinically relevant malady. This would only be justified if such functional impairments cause individual harm, either because they are accompanied by suffering (the illness criterion) or because they interfere with basic activities of daily living such as personal hygiene and food intake (the sickness criterion of a clinically relevant malady). We apply this theory to mental disorders, conclude that only a fraction of such “disorders” currently listed in international classifications of diseases are clinically relevant mental maladies, suggest focusing on the needs of persons with such maladies and recommend avoiding “pathologization” of human diversity. (shrink)
The disease status of mental disorders has been hotly debated and is still highly relevant for ethical and economic considerations regarding the human rights of psychiatric patients. Here we critically discuss traditional evolutionary and degenerative concepts of mental disorders and propose instead the differentiation between independent dimensions of mental health resources on the one hand and mental disorders on the other. We suggest that impairments of a minimal set of mental functions can serve as indicators of exogenous and endogenous psychoses, (...) while other mental disorders cannot be diagnosed without a reference to setting and culture. (shrink)
Extensive research has demonstrated that rs1360780, a common single nucleotide polymorphism within the FKBP5 gene, interacts with early-life stress in predicting psychopathology. Previous results suggest that carriers of the TT genotype of rs1360780 who were exposed to child abuse show differences in structure and functional activation of emotion-processing brain areas belonging to the salience network. Extending these findings on intermediate phenotypes of psychopathology, we examined if the interaction between rs1360780 and child abuse predicts resting-state functional connectivity between the amygdala and (...) other areas of the salience network. We analyzed data of young European adults from the general population who took part in the IMAGEN study. In the absence of main effects of genotype and abuse, a significant interaction effect was observed for rsFC between the right centromedial amygdala and right posterior insula, which was driven by stronger rsFC in TT allele carriers with a history of abuse. Our results suggest that the TT genotype of rs1360780 may render individuals with a history of abuse more vulnerable to functional changes in communication between brain areas processing emotions and bodily sensations, which could underlie or increase the risk for psychopathology. (shrink)
