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3.
A 40-year-old man develops depressed mood, anhedonia, initial and terminal insomnia, loss of appetite, a 10-lb weight loss, and difficulty with sexual arousal. The clinical features of the patient's psychiatric illness suggest dysfunction of which of the following?
A. Frontal lobes
B. Pituitary
C. Hippocampus
D. Hypothalamus
E. Corpus callosum
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limbic system deals with personality and emotional expression (flight,fight,feeding and procreation)
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WHAT'S THE CORRECT ANSWER??
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The answer is: D
Clinical studies of patients with major depressive disorders indicate that an intrinsic regulatory defect involving the hypothalamus underlies the disorder. It also involves the monoamine pathways. The hypothalamic modulation of neuroendocrine activity has been implicated, as have been the neurotransmitter systems of serotonin and norepinephrine. Recent evidence suggests a major role for the heritability of such neurochemical disorders. The role of behavior in stimulating or triggering such mechanisms is also being explored. While the frontal lobes, the pituitary, the hippocampus, and the corpus callosum are related to the emotions, memory, and neural communications, they do not play as major a role in the depressive disorders as does the hypothalamus
