Archive for April, 2009
Duke University’s Rajendra Morey was in the news this week following a presentation at the World Psychiatric Association Congress in Italy. Dr Morey’s group recently published a paper equating symptoms of post posttraumatic stress disorder (PTSD) with “markedly different neural activity”. Dr. Morey raised the possibility of using brain scans to diagnose PTSD, thereby catapulting herself into the science pages of Forbes, Reuters et al. She joins a lengthy list of researchers that have whetted our appetite with tantalizing suggestions about the predictive power of neuroimaging. Sadly, the list of those who have followed through on this promise is not quite so More >
Bernard Crespi, an evolutionary geneticist at the Simon Fraser University in Burnaby, Canada, has proposed that schizophrenia and autism are the opposite ends of the same social spectrum. Speaking at the Sackler Colloquium on Evolution in Health and Medicine at the National Academy of Sciences, Crespi noted that copy number variations (CNVs) in the human genome are similar for both schizophrenia and autism. What are CNVs and what evidence is their to support Crespi’s hypothesis?
What are CNVs?
Copy number variations are spontaneous mutations in the genome that result in duplications or deletions of the genomic sequence. Duplications can produce extra More >