MGH imaging study finds differences in brain area responsible for vigilance
A key area in the brains of people who displayed an inhibited temperament as toddlers shows a greater response to new faces than does the same brain area in adults who were uninhibited early in life, according to a study by researchers from Massachusetts General Hospital (MGH). The imaging studies of the amygdala - a part of the brain that responds to events requiring extra vigilance - appear in the June 20 issue of Science.
"Our findings both support the theory that differences in temperament are related to differences in amygdala function, something earlier technology could not prove, and show that the footprint of temperamental differences observed when people are younger persist and can be measured when they get older," says Carl Schwartz, MD, director of the developmental psychopathology lab in the MGH Psychiatric Neuroscience Program, the paper’s first author. "In a way, this research is the neuroscientist’s version of the ’Seven-Up’ movies," he adds, referring to a well-known series of British documentaries that have revisited a group of people every seven years for more than 40 years.
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