Carbon Radioisotopes Provide Evidence of Neurogenesis in Adulthood News Round-Up June 3rd Edition 2013

Researchers looked at involuntary treatment in people with Schizophrenia in Denmark using a Psychiatry register. The researchers looked at the data for 18599 patients over a 7 year period. Of these patients 3078 underwent involuntary treatment. The researchers found that treatment with antipsychotics accounted for 99.5% of involuntary psychotropic drugs administered. Electroconvulsive therapy accounted for only 4.8% of all involuntary treatments. These findings may not be generalisable to other countries as there are many factors that can influence these results including the structure of health services.

Neuroscience

brain.1Researchers have used atmospheric atomic explosions to examine neurogenesis in the human brain in adulthood. There has been a longstanding debate about whether the brain gives rise to new neurons in adulthood. This has been a tricky area to examine due to a number of technical difficulties.

However when nuclear weapons were detonated in the atmosphere between 1945 and 1963 this increased the amount of Carbon-14 in the atmosphere. Carbon is an essential component of living organisms and therefore the uptake of C14 during this period left a signature.

The ratio of these different forms of Carbon enabled researchers to calculate the age of organic tissue. By looking at the brains of several subjects region by region they were able to identify brain regions with evidence of neurogenesis. The analysis is complex but the researchers concluded that neurogenesis occurs in the Dentate gyrus throughout adult life. There were other findings and there is a good write-up at New Scientist.

Evolutionary Psychiatry

Evolutionary PsychiatryResearchers studying Chimpanzees at Lincoln Park Zoo have identified five personality dimensions that correlate well with behaviour. The researchers identified 5 Chimpanzee personality  dimensions including dominance and agreeableness. They monitored the behaviour of 99 Chimpanzees over a two year period and correlated this with the personality measures. The researchers also used two raters to validate the personality measures. Chimpanzees are our nearest extant relative and the classification of Chimpanzee personality may be relevant to personality traits in humans.

 

Appendix

News Round-Up 2008-2011

News Round-Up 2012

Index: There are indices for the TAWOP site here and here Twitter: You can follow ‘The Amazing World of Psychiatry’ Twitter by clicking on this link. Podcast: You can listen to this post on Odiogo by clicking on this link (there may be a small delay between publishing of the blog article and the availability of the podcast). It is available for a limited period. TAWOP Channel: You can follow the TAWOP Channel on YouTube by clicking on this link. Responses: If you have any comments, you can leave them below or alternatively e-mail justinmarley17@yahoo.co.uk. Disclaimer: The comments made here represent the opinions of the author and do not represent the profession or any body/organisation. The comments made here are not meant as a source of medical advice and those seeking medical advice are advised to consult with their own doctor. The author is not responsible for the contents of any external sites that are linked to in this blog.

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