Cultural Neuroscience

Shihui Han and Georg Northoff have just published Culture-Sensitive Neural Substrates of Human Cognition: A Transcultural Neuroimaging Approach. This article will prove foundational for “cultural neuroscience,” a term Han & Northoff use near the end of the article. I highly recommend that everyone read the full version (pdf), but will outline and comment on it here.

In this Perspectives piece in Nature Neuroscience Reviews, Han and Northoff review the evidence on how culture influences neural mechanisms, highlight the need to integrate social neuroscience and cultural cognition research, argue for transcultural neuroimaging as an effective method for cultural neuroscience, and lay out implications for the future of this emerging field.

But if you don’t take my word for it, here’s their abstract:

Our brains and minds are shaped by our experiences, which mainly occur in the context of the culture in which we develop and live. Although psychologists have provided abundant evidence for diversity of human cognition and behaviour across cultures, the question of whether the neural correlates of human cognition are also culture-dependent is often not considered by neuroscientists. However, recent transcultural neuroimaging studies have demonstrated that one’s cultural background can influence the neural activity that underlies both high- and low-level cognitive functions. The findings provide a novel approach by which to distinguish culture-sensitive from culture-invariant neural mechanisms of human cognition.

Cultural Effects on Cognition

Han and Northoff systematically cover research on “cultural effects on cognition,” including perceptual processing, attentional modulation, language and music, and number representation and mental calculation. Their Figure 1, presented below, summarizes research on culture and attention, highlighting context-dependent differences in attention between Americans and East Asians.

Continue reading “Cultural Neuroscience”

New Four Stone Hearth

So the new Four Stone Hearth, the blog carnival of anthropology, is up at Almost Diamonds. Stephanie may not be an anthropologist, but she puts together a formidable list, including several Olympic-related posts, such as Rex’s (he’s still Alex to me) contribution at Savage Minds, Well I guess we should say something about the Olympics and a fascinating short post by Vaughn at Mind Hacks on cross-cultural studies of the immediate reaction to winning and losing among sighted and blind athletes. There’s a number of good archaeological posts (including Stone Pages pointing to a story about Australia’s less-than-enthusiastic attempts to preserve archaeological sites), a cluster on Neandertal research, and a fascinating piece on artificial language evolution in the laboratory from Anthropology.net (with actual people instead of computers doing the learning).

Lots of good stuff — so why are you still here and not reading it?!

Mental Health in the Aging

The average life expectancy is at its highest ever in history. Brain cells are built to live up to 127 years. However, they do not divide and replicate the same way other cells do, and so their vulnerability to attack by radiation and free radicals is more problematic. Cell loss in the normal ageing brain is patchy. There is a small stock of stem cells from which neuronal regeneration is possible, but scientists are still only just learning of their full functions now. It is believed that the brain shrinks with age. Amongst European populations it can shrink by as much as 15% between the ages of fifty and sixty-five.  Much of this reduction is due to brain cells shrinking as they lose water, while the spaces in the brain (called ventricles) and the folds of the cortex (called sulci) enlarge. Blood supply also diminishes slightly with age.

Of greatest importance are the connections between nerve cells. It is these connections that must constantly battle for survival. The gift of prolonged life is not without its anxieties. We worry about losing our memory and about the reduction in our cognitive performance. While there is an increase in the range and complexity of our language, this is accompanied by an increased frequency of mistakes, forgetting words or misnaming objects. We should remind ourselves that with age, there are greater powers of reflection and contemplation. The wonderful gift of experience is to be rejoiced. The aging brain has a greater capacity to deal with complex emotions and to complement decisions with a raft of knowledge. While the ageing brain is slower, it is this slowness in decision-making that allows time for better decisions to be made—this is called wisdom.

 

Links:

                               

Australian Centre for Posttraumatic Mental Health

Alzheimers Association Brain Health                                

American Society on Aging                                    

Alliance for Aging Research                                               

Cognitive and Emotional Health                             

Mental Health and Aging                                         

Aging and Mental Health                                         

Mental Health through the lifespan                         

Mental Health and Wellbeing                                              

Ageing and Mental Health                                       

Center for Mental Health and Aging                                   

Department of Aging and Mental Health   

Wednesday Round Up #24

Extended Mind

Andy Clark, Natural Born Cyborgs?
The noted philosopher of mind delivers his Edge piece on the extended mind, embodiment, and technology

Paul Rabinow & Gaymon Bennett, A Diagnostic of Equipmental Platforms
Working Paper #9 of ARC: Anthropology of the Contemporary Research Collaborative.
The paper, through focusing on “equipment” (what mediates method and technology), aims to “bring the biosciences and the human sciences into a mutually collaborative and enriching relationship.”

Lambros Malafouris, The Cognitive Basis of Material Engagement: Where Body, Brain and Culture Conflate
Neuroarchaeologist on cognition, brain and material culture

Taede Smedes, Review – Mind in Life
A philosopher gives his take on Evan Thompson’s massive new book, Mind in Life: Biology, Phenomenology, and the Sciences of the Mind

M. Wheeler, Final Report – The Interactive Mind: A Series of AHRC Workshops
The Arts and Humanities Research Council sponsored a series of meetings on the interactive mind. This final report, while also filled with technical information about the meetings themselves, contains a nice summary of the major cross-disciplinary themes of the workshop. A good guideline to how to think about the extended mind.

Tim Ingold, Culture from the Ground: Walking, Movement and Placemaking
Homesite for this integrative project. The research is now out as a new book, Ways of Walking: Ethnography and Practice on Foot.

Andy Clark and David Chalmers, The Extended Mind
Online paper that lays out the case for “active externalism”

Theresa Sheft, Reading Notes for Donna Haraway’s “A Cyborg Manifesto”
Background and summary to the iconic essay, which you can read in full here

Robert Logan, The Extended Mind Model of the Origins of Language and Culture
How the extended mind relates to hominid evolution, particularly the emergence of language and culture. For more from Logan, see his website.

Robin Prior, Extending the Extended Mind
Past, present and future of the extended mind – a worthwhile MA thesis. For the summary and lots of useful links, see Prior’s site.

Frederick Adams and Kenneth Aizawa, The Bounds of Cognition
Recent book that critiques embodied cognition and the extended mind. For the book summarized into a paper, check out their online essay, Why the Mind Is Still in the Head.

Brain

Mind Hacks, The Best Is Yet to Come: Reward Prediction in the Brain
Computation, dopamine and the reward model considered

Continue reading “Wednesday Round Up #24”

Integrative Neuroscience

Integrative Neuroscience is a multidisciplinary endeavour to build unified models of the brain from the various disciplines within the neurosciences. It is an effort to break down the boundaries and encourage a freer exchange of information across disciplines and scales. The highly jargonised world of science can often mean that findings from one area of science are completely incomprehensible to another. However, it is crucial that efforts are made to consolidate the knowledge from various streams within the brain sciences. From the micro-scale findings to the macro-scale findings, integrative neuroscience deeply informs clinical research and practice. It means that when a patient is diagnosed with a brain disease, we can typify the genetic, neurological, social and environmental influences on his/her condition. It is a form of diagnosis and treatment that has never existed before.

While two brains may perform the same function, the way in which they do it is never the same. Statistically it is almost impossible for the underlying connections of any two brains to be exactly the same. What does this mean? Well, it means that no two brains react to the same actions or events in the same way. You may jump out from a hiding place and scream “boo” at your best friend who freezes in fright, while someone else might react more aggressively. Similarly, if you administer a neuroactive drug to two different people, the effects can be dramatically different. That is why some patients who are prescribed medication for a brain disorder may get better, while other patients may have little or no reaction to the same drug. You will often find that Psychiatrists, neurologists and other clinicians will personalise treatments for patients. Whether the treatment is behavioural, cognitive or pharmacological, nearly all treatments must be personalized. These treatments can only become better when more people share their experience and knowledge of personalized medicine. So what is your story?

LINKS:

Integrative Neuroscience Links         

Journal of Integrative Neuroscience   

Brain Dynamics Centre                                                

Integrative Neuroscience Facility                                             

Centre for Integrative Neuroscience and Neuroengineering

Brainnet

Brain Resource Company

 

 

                          

Personalized Medicine

There is a large amount of variation in the manifestation of brain disease. There is also a large amount of variation in the response to treatment. Often patients are prescribed drugs on a trial-and-error basis until the right drug is found. This situation, multiplied across many cases, can lead to over-servicing, inefficiency and high expenses in the healthcare industry—not to mention the stress this places on individuals, their families and friends. Integrated Neuroscience could be heading towards an answer in dealing with the large amount of variation in the symptoms, diagnosis and treatment of brain disorders. This answer is called ‘Personalized Medicine’. A Brain-related Personalized Medicine approach matches genetic markers (gene-related information) with neuromarkers (brain-related information).

The brain is arguably the most complex organ of the body. It is subject to biological and environmental influences as well as the personal life history and experiences of individuals. A Personalized Medicine approach hopes to match treatment programs with the biological and psychological profile of each individual. With recent advances in biomedical science, this treatment ethic may be more realistic than ever before. Neurogenomics has gone some way in elucidating a vast number of genes that play a role in various brain disorders. However, a genetic approach alone is insufficient to diagnose and treat the development of brain disease. The combination of both genetic-markers and neuro- markers is crucial in the ultimate success of any one particular treatment.

Neuromarkers include observations of brain structure (using MRI), imaging of brain function (EEG, ERP, MEG, fMRI and PET) and psychological tests measuring social, emotional and cognitive performance. Further research is needed towards the orientation of Brain-related Personalized Medicine. Research will need to establish the links between genetic-markers and neuromarkers (genomic-neuromarkers) for use in diagnostics, drug development, treatment prediction and treatment efficacy monitoring. From here, clinicians will be able to better match the appropriate treatment for each patient according to the developmental stage of their disorder. The outcomes may even extend further to a preventative medicine that contributes to disability management, harm minimization, psychosocial and quality of life recovery.

Links:

The Biomarkers Consortium

The Personalized Medicine Coalition

Personalized Medicine Coalition

The Food and Drug Administration

The Royal Society

Dan Segal Report

The Brain Resource Company

 

The Brain Resource International Database is one methodology used to acquire genomic-neuromarker profiles. The Database pools data about genetic make-up, brain structure and function, cognition and psychology as well as the life history of participants.

These ‘genomic-neuromarkers’ will be incorporated in the next version of the DSM (DSM V) expected to be released in 2011.