A neuroscientist whose car was firebombed by violent animal rights activists has decided to fight back, at least in the court of public opinion. The UCLA professor, David Jentsch, has formed a group called UCLA Pro-Test, and is organizing a rally in support of animal testing. “People always say: ‘Don’t respond. If you respond, that will give [the attackers] credibility,’” Jentsch, 37, said in a recent interview in his UCLA office. “But being silent wasn’t making us feel safer. And it’s a moot point if they are coming to burn your car anyway, whether you give them credibility or not” [Los Angeles Times].
UCLA Pro-Test, named after a similar group in the United Kingdom, wants to show its support for animal research that is conducted in a humane and regulated way. Jentsch studies schizophrenia and drug addiction, and works on both rodents and vervet monkeys.
The Animal Liberation Brigade took credit for bombing Jentsch’s Volvo as it sat in his driveway in the early morning hours of March 7. The activist group wrote in an Internet posting: “The things you and others like you do to feeling, sentient monkeys is so cruel and disgusting we can’t believe anyone would be able to live with themselves…. David, here’s a message just for you, we will come for you when you least expect it and do a lot more damage than to your property” [Los Angeles Times].
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Two large, international studies have independently found three genetic mutations that are linked to a greatly increased risk of schizophrenia, but say the rare mutations only account for a small percentage of schizophrenia cases. The identification of the three mutations is being hailed as a breakthrough, as no genetic factors had been definitively linked to the disease before. But in a finding of even greater importance, the studies suggest that there’s no easy answer to the question of what causes the devastating mental illness. Instead of a common genetic problem, schizophrenia may be triggered by many rare mutations that cause subtly different variants of the disease.
“What is beginning to emerge is that a lot of the risk of brain diseases is conferred by rare [genetic] deletions,” [study author Kari] Stefansson said…. The new focus on rare mutations suggests that natural selection is highly efficient at removing schizophrenia-causing genes from the population. Despite selection against the disease, according to this new idea, schizophrenia continues to appear because it is driven by a spate of new mutations that occur all the time in the population. [The New York Times].
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Researchers have made a map of the human brain that shows a dense network of connections at the top of the cerebral cortex, suggesting that electrical signals travel through this hub on their way to more specialized regions. “This is just about the coolest paper I’ve seen in a long time, and forward-looking in terms of where the science is going,” said Dr. Marcus E. Raichle, a professor of neurology and radiology… who was not involved in the research. He added, “They’ve found in the brain what looks like a hub map of the airline system for the United States” [The New York Times].
An international team of researchers used a technique called diffusion spectrum imaging to map the connections between different parts of the brain. The technique traces the path of water moving along axons, long fibers that extend from a neuron’s main body and carry electrical signals [Science News]. They found the most connections at the top of the cortex along the crack that separates the brain’s two hemispheres. According to researchers, that area is not only a relay station, it’s also the area that’s most active when the brain is in “default mode,” the activation state present when the brain is not engaged in any specific cognitive task [The Scientist].
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