NEUR 1201 Final: Final practice Answers
11 Jun 2020
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Depressive (affective) disorders: women are twice as likely as men to suffer from depression. It may appear at any age but typical onset is between ages 20-30 and the prevalence of major depression among younger age groups appears to be increasing. It effects of 1-2% of the population and is equally common in males and females: bipolar disorder i is characterized by at least one manic or mixed episode (both mania and depression). Can consist of rapid cycling rates (four or more cycles in one years) or some individuals may cycle several times in one day. The concordance rate for identical twins is 45. 6% and the concordance rates for fraternal twins is 20. 2%. This shows that depression has a very large component but the non-genetic component is still larger: the monoamine hypothesis suggests depression is caused by reduced synaptic activity of norepinephrine and serotonin.
