From the article: Abstract Over the last decades, philosophers and cognitive scientists have argued that the brain constitutes only one of several contributing factors to cognition, the other factors being the body and the world. This position we refer to as Embodied Embedded Cognition (EEC). The main purpose of this paper is to consider what EEC implies for the task interpretation of the control system. We argue that the traditional view of the control system as involved in planning and decision making based on beliefs about the world runs into the problem of computational intractability. EEC views the control system as relying heavily on the naturally evolved fit between organism and environment. A ‘lazy’ control structure could be ‘ignorantly successful’ in a ‘user friendly’ world, by facilitating the transitory creation of a flexible and integrated set of behavioral layers that are constitutive of ongoing behavior. We close by discussing the types of questions this could imply for empirical research in cognitive neuroscience and robotics.
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Background: Health care practitioners' knowledge and attitudes influence patients’ beliefs and health outcomes in musculoskeletal (MSK) pain. It is unclear to what extent physiotherapists undertaking a postgraduate master in manual therapy (MT students) possess the knowledge and attitudes toward pain neuroscience to be able to apply the biopsychosocial model in patients with MSK pain. Objectives: The aim of this study was to assess the knowledge and attitudes toward pain neuroscience in MT students. Design: A cross-sectional study. Method: Self-reported knowledge and attitudes were measured among students (n = 662) at baseline and in all years of the MT postgraduate programs in the Netherlands. The Knowledge and Attitudes of Pain questionnaire (KNAP) was used as a primary measure. Difference in KNAP-scores between baseline (0), year 1, year 2 and year 3 was tested using a one-way ANOVA (hypothesis: 0 < 1
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The primary aim was to investigate feasibility of a web-based cross-over Paleolithic diet intervention in the general population. The secondary aim was to calculate the sample size needed to reach a statistically significant difference in effect of a Paleolithic-like diet on psychological and somatic symptoms compared with the Dutch consensus diet.
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Background: Healthcare practitioner beliefs influence patients’ beliefs and health outcomes in musculoskeletal (MSK) pain. A validated questionnaire based on modern pain neuroscience assessing Knowledge and Attitudes ofPain (KNAP) was unavailable.Objectives: The aim of this study was to develop and test measurement properties of KNAP.Design: Phase 1; Development of KNAP reflecting modern pain neuroscience and expert opinion. Phase 2; a crosssectional and longitudinal study among Dutch physiotherapy students.Method: In the cross-sectional study (n = 424), internal consistency, structural validity, hypotheses testing, and Rasch analysis were examined. Longitudinal designs were applied to analyse test-retest reliability (n = 156), responsiveness, and interpretability (n = 76).Results: A 30-item KNAP was developed in 4 stages. Test-retest reliability: ICC (2,1) 0.80. Internal consistency: Cronbach’s α 0.80. Smallest Detectable Difference 90%: 4.99 (4.31; 5.75). Structural validity: exploratory factor analysis showed 2 factors. Hypotheses testing: associations with the Pain Attitudes and Beliefs Scale for Physiotherapists biopsychosocial subscale r = 0.60, with biomedical subscale r = 0.58, with the Neurophysiology of Pain Questionnaire r = 0.52. Responsiveness: 93% improved on KNAP after studying pain education. MinimalImportant Change: 4.84 (95%CI: 2.77; 6.91).Conclusions: The KNAP has adequate measurement properties. This new questionnaire could be useful to evaluate physiotherapy students’ knowledge and attitudes of modern pain neuroscience that could help to create awareness and evaluate physiotherapy education programs, and ultimately provide better pain management.
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Background: Insufficient amounts of physical activity is a risk factor for (recurrent) stroke. People with a stroke or transient ischemic attack (TIA) have a high risk of recurrent stroke and have lower levels of physical activity than their healthy peers. Though several reviews have looked at the effects of lifestyle interventions on a number of risk factors of recurrent stroke, the effectiveness of these interventions to increase the amounts of physical activity performed by people with stroke or TIA are still unclear. Therefore, the research question of this study was: what is the effect of lifestyle interventions on the level of physical activity performed by people with stroke or TIA? Method: A systematic review was conducted following the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) statement. Pubmed, Embase and Cumulative Index for Nursing and Allied Health Literature (CINAHL), were searched up to August 2018. Randomised controlled trials that compared lifestyle interventions, aimed to increase the amount of physical activity completed by participants with a stroke or TIA, with controls were included. The Physiotherapy Evidence Database (PEDro) score was used to assess the quality of the articles, and the Grading of Recommendations, Assessment, Development and Evaluations (GRADE) method for the best evidence synthesis. Results: Eleven trials (n = 2403) met the inclusion criteria. The quality of the trials was mostly high, with 8 (73%) of trials scoring ≥6 on the PEDro scale. The overall best evidence syntheses showed moderate quality evidence that lifestyle interventions do not lead to significant improvements in the physical activity level of people with stroke or TIA. There is low quality evidence that lifestyle interventions that specifically target physical activity are effective at improving the levels of physical activity of people with stroke or TIA. Conclusion: Based on the results of this review, general lifestyle interventions on their own seem insufficient in improving physical activity levels after stroke or TIA. Lifestyle interventions that specifically encourage increasing physical activity may be more effective. Further properly powered trials using objective physical activity measures are needed to determine the effectiveness of such interventions.
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Mirror neurons in the cerebral cortex have been shown to fire not onlyduring performance but also during visual and auditory observation ofactivity. This phenomenon is commonly called cerebral resonance behavior.This would mean that cortical motor regions would not only beactivated while singing, but also while listening to music. The sameshould hold true for playing a music instrument. Although most individualsare able to sing along when they hear a melody, even highlyskilled instrumentalists, however, are frequently unable to play by ear.They are score-dependent—i.e. they are only able to play a piece of musicwhen they have access to the notes—while musicians who are able to playby ear and improvise are non score-dependent; they are able to playwithout notes. Our hypothesis is that score-dependent instrumentalistswill exhibit less cerebral resonance behavior than non score-dependentmusicians while listening to music. Using fMRI to measure BOLD response,subjects listen to two-part harmony presented with headphones.The following experimental conditions are distinguished: (1) well-knownvs. unknown music (2) motor imagery vs. attentive listening. A voxelbasedanalysis of differences between the condition-related cerebral activationsis performed using Statistical Parametric Mapping.
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Metacognition comprises both the ability to be aware of one’s cognitive processes (metacognitive knowledge) and to regulate them (metacognitive control). Research in educational sciences has amassed a large body of evidence on the importance of metacognition in learning and academic achievement. More recently, metacognition has been studied from experimental and cognitive neuroscience perspectives. This research has started to identify brain regions that encode metacognitive processes. However, the educational and neuroscience disciplines have largely developed separately with little exchange and communication. In this article, we review the literature on metacognition in educational and cognitive neuroscience and identify entry points for synthesis. We argue that to improve our understanding of metacognition, future research needs to (i) investigate the degree to which different protocols relate to the similar or different metacognitive constructs and processes, (ii) implement experiments to identify neural substrates necessary for metacognition based on protocols used in educational sciences, (iii) study the effects of training metacognitive knowledge in the brain, and (iv) perform developmental research in the metacognitive brain and compare it with the existing developmental literature from educational sciences regarding the domain-generality of metacognition.
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PowerPointpresentatie gebruikt bij een presentatie van Hans Hopster, lector Diergedrag, Diergezondheid en Dierenwelzijn, op 3 maart 2020 aan de Provinciale Staten van Friesland te Leeuwarden.
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Functional Magnetic Resonance Imaging (fMRI) was used to study the cerebral underpinning of resonance behavior in professional keyboard musicians (n=12). The activation paradigm implied that subjects listened to two-part polyphonic music, while either critically appraising the performance or imagining they were performing themselves. Two-voice audition and bimanual motor imagery circumvented a hemisphere bias associated with a main melody.Both tasks activated ventral premotor and auditory cortices, bilaterally, and the anterior parietal cortex right-dominantly, compared to 12 musically unskilled controls. Although left ventral premotor activation was increased during imagery (compared to judgment), bilateral dorsal premotor and right posterior-superior parietal activations were quite unique to motor imagery, suggesting that musicians not only recruited their manual motor repertoire but alsoperformed a spatial transformation from the vertical perceived pitch axis to the horizontal keyboard. Imagery-specific activations in controls comprised left dorsal parietal-premotor and supplementary motor cortices. Although these activations were less strong compared to musicians, this overlapping distribution indicated the recruitment of a general 'mirror-neuron'circuitry. These two levels of sensori-motor transformations point towards common principles by which the brain organizes audition-driven music performance and visually guided task performance.
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SummaryADHD and reificationThis thesis starts with a quote from eleven-year-old Sylvia, who thinks ADHD “is like a cancer (...) but you’re not going to die from it”. ADHD is no disease like cancer, but a con- cept from the Diagnostic and Statistical Manual of Mental Disorders (DSM), currently in its fifth edition. The DSM-5 defines ADHD with -partly overlapping- behavioral criteria such as “often has trouble waiting his/her turn” and “often interrupts or intrudes on others”. Thinking that the definitions in the DSM are concrete illnesses, such as Sylvia does, is acknowledged as a problematic phenomenon called reification. The most well- known mechanism of reification is called the “nominal fallacy”: naming behaviors carries the risk of thinking we have thereby explained them. In fact, constructs like ADHD only name these behaviors. However, confusing naming and explaining is just one of the mechanisms of reification. This thesis aims to answer the questions: how is ADHD reified in written discourse, and how often do these identified mechanisms of reification occur?Generalization and other mechanisms of reificationBesides confusing naming and explaining, generalizations can also lead to reification; particularly group-to-individual generalization. For instance, the authors of a large meta-analysis of brain-anatomy compared groups classified with ADHD with groups of “normal” individuals. They stated in their paper in 2017: “We confirm, with high-pow- ered analysis, that patients with ADHD have altered brains; therefore ADHD is a disorder of the brain. This message is clear for clinicians to convey to parents and patients”. The find- ings were in fact mere averages, and the case and control groups largely overlap. The authors wrongly suggest that all those classified with ADHD have different (smaller) brain parts. In fact, many with an ADHD classification have larger than average brain parts while many without an ADHD classification have brain parts that are smaller than average.There are many other reifying mechanisms. For instance, when reporting about case-control studies of neurophysiology and neurochemistry, researchers often select brain-images of the extremes from both samples. These images are then often pre- sented as allegedly representative of the brain activity and neurochemistry of a whole population of those classified with ADHD. In reality, case and control groups again show much overlap. Furthermore, brain activity differs strongly across people, regardless of an ADHD classification. Also within persons neurochemistry and physiology are not consistent through time.Medical jargon, for instance words like “symptom”, can also reify ADHD as the term implies that behaviors like interrupting others are the result of a disease or disorder. Speaking of criteria for ADHD is a more appropriate term, as this word refers to a stand- ard on which a decision may be based, and the word does not suggest the behaviors are caused by an innate problem.Similarly, by using metaphors, such as comparing ADHD to a meat-cleaver that splits the brains of those with ADHD, agency is ascribed to the ADHD-concept as a real entity that does damage to the human brain. This reifies ADHD and such a metaphor may also create fear and stigma. Another reifying mechanism is the suggestion of causality when only correlation is empirically proven. It is often suggested that ADHD can cause academic failure and maladaptation to the point of delinquency. However, as for instance child maltreatment can cause problems of inattention and restless behaviors –for which the ADHD-con- cept merely provides a name- both ADHD and delinquency can be confounded by adverse circumstances.ADHD can also be reified by “textual silence”: omitting important information that shows the construct does not represent a steady and reliable disorder. For instance: birth-month studies reveal that normal, age-related behaviors tend to be “diagnosed” with ADHD and medically treated. Not mentioning this important information can leave the perception of ADHD as a concrete entity intact.How often do these reifying mechanisms occur?Using a sample of 43 academic textbooks used at universities in the Netherlands, this thesis aims to quantify the occurrence of reifying mechanisms such as textual silence in relation to genetics. For instance, roughly half of the textbooks mention 60-80% heritability estimates of twin/family and adoption studies that compare behaviors of relatives to estimate the influence of genetics. At the same time, these textbooks omit that the more precise molecular genetic studies reveal a low direct influence of genes of about 5%. Only a quarter of the textbooks mention the contrasting findings, which reveal that twin/family and adoption studies cannot separate genetic from environ- mental influences very well. A quarter of the textbooks do contrast the high outcome of twin/family/adoption studies and the limited effects according to molecular studies. This “missing heritability problem”, as it is known, is not mentioned explicitly as such.Generalizations are also a common mechanism of reification. Of 36 textbooks that discuss brain anatomy in relation to ADHD, 21 (58%) do not mention that empirical outcomes are mere average findings that have little bearing on individuals classified as having ADHD. Fifteen chapters on ADHD did place such findings in perspective, by referring, for instance, to the fact that such findings are mere group outcomes. Only 3 of those, however, clearly mentioned that those with ADHD do not necessarily have different brains, or that “normal” controls can also have different/smaller brains. Only one chapter on ADHD mentioned both: no single deficit is necessary or sufficient to explain all cases of ADHD. Additionally, none of the chapters mentioned sampling bias due to the use of “supernormal” controls on the one hand and “refined phenotypes”, rigorously screened ADHD cases, on the other.Background of reificationReification is a concept from scholars filed under the sociological school of “Conflict Theory” that sees the quest for power as a foundation of social relationships. Framing ADHD as a hardwired genetic and brain-based illness can privilege medical profes- sionals. When described by the catch-all concept that ADHD is at risk of becoming, everyday behaviors like interrupting others are framed as medical problems and not as a normal part of socialization. As a result, non-medical professionals, like teachers, may feel inept.Conflict Theory also addresses the monetary basis at the heart of the production of knowledge. Differences in the availability of monetary resources (e.g. from pharma- ceutical companies) might further tilt the power balance, such as by financing dedicated companies that help to prepare presentations, write scientific papers (ghost writing) and recruit opinion leaders. However, a conflict theoretical perspective seems limited to explain the passion of some of those who believe strongly in the biological approach. Financial incentives might not necessarily have preceded this enthusiasm, and many researchers do not receive industry funding.Philosophers such as Trudy Dehue and Charles Taylor bring an additional, more “functional” perspective to explain our contemporary eagerness to reify concepts such as ADHD. Dehue, for instance, states that as biological explanations of behavior, concepts like ADHD are functional by providing an excuse for the person one is, par- ticularly if one fails to meet the neo-liberal norm of being self-reliant and successful. Taylor traced one of the roots of this neo-liberal ideology, which he calls “disengaged reason” all the way back to the likes of Plato and Descartes. Disengaged reason means that humans can find true beliefs about the world when being disengaged from it and being disengaged from one’s emotions. This ideal is represented well by Descartes’ “I think therefore I am”.The success of science, partly founded on this notion of disengaged reason, eroded the influence of the church. The influence of the normative framework that the church provided eroded as well and created a void that, from a functional perspective, needed to be filled. Psychiatry rose to the occasion to help fill this void with its’ own psychiatric bible –as the DSM is often called. Perhaps unsurprisingly, psychiatry, as the new sci- ence-based norm-setting institution, is engrained with this ideal of disengaged reason.ADHD and the ideal of disengaged reasonI argue that the rationalistic norms strongly surface in the ADHD-concept. We expect children to control their impulses, be silent in their play and await their turn. Also in the way we study human behavior and “diagnose” children as having a neurodevelopmental disorder - based on splicing their behaviors and counting “symptoms”, we lean towards disengaged reason. A diagnosis does not require asking for a child’s motives for his/ her behavior. So, both the norms we bestow upon children via the ADHD-concept, and the norms we bestow upon ourselves by the way we try to classify them without the need to involve children themselves to give meaning to their behaviour, reflect the dominance of this disengaged reason in my view.ImplicationsSo, possibly we reify and fail to be objective to the disappointing outcomes of empirical studies with the ADHD construct due to our own narrow (institutional) interests. Or, possibly we have historically embedded high hopes for the success of psychiatry’s nor- mative framework. Either way, such interests or high hopes do not necessarily overlap with the interests of the child, which should be our primary concern. So finally, some political and practical implications are offered to safeguard the child’s best interest.Future studies based on this thesis could estimate the prevalence of reifying mech- anisms and could also include different domains of discourse besides textbooks. Ad- ditionally, institutional dependency on constructs from the DSM should be examined critically. For instance, scientific funding agencies should consider the pros and many limitations of the study into the highly reified classifications and consider alternative classifications, such as using Research Domain Criteria. Another possible approach to research and providing care is using a more tentative, back-and fourth, normalizing approach such as stepped diagnosis and stepped care. From a political point of view the high interdependence of science and commercially vested interest calls for reconsider- ation of how we can use financial resources. One longstanding idea is to concentrate these resources in a fund with representatives from different branches of industry, science and government.Finally, medically framing children’s restlessness that is associated with a plethora of problems -such as the contemporary schooling system, divorce, poverty, trauma and loss- makes it easy to forget such larger issues. To avoid this, we should seek refuge in the institute that aims to protect the child’s autonomy, agency and safety in the face of the many individual and collective challenges that our children are confronted with: The Convention on the Rights of the Child. This institution should also safeguard that our current healthcare system with its classifications is part of the solution and not part of the problem.
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