Researchers: Stress Causes Forgetfulness
(Washington, AP, 10/28/04)

When Dr. Amy F. T. Arnsten of Yale Medical School, and team, induced stress in rats and monkeys using chemicals, the researchers discovered that, when a situation seems out of control, the resultant stress may generate an enzyme called protein kinase C (PKC) which blocks short-term memory and other activity in the prefrontal cortex, the area of the brain associated with abstract thinking. These findings may be helpful in developing new treatments for illnesses like schizophrenia and bipolar disorder, in which the PKC enzyme is active. Scientists speculate that this blocking of the reasoning part of the brain may have evolved as a protective mechanism, useful in dangerous situations where quick reactions are more valuable than prolonged thought.

(Science, October 2004)