The causes of somatic system disorders may be related to:

A) faulty perceptions of body sensations.
B) traumatic childhood events.
C) culture-bound phenomena.
D) mood instability.

Structural or functional abnormalities of the brain have been suggested to lead to the somatic system disorders, resulting in disturbed processes of perception and interpretation of bodily sensations. Furthermore, cognitive theorists believe patients misinterpret the meaning of certain bodily sensations and then become excessively alarmed by them. Traumatic childhood events are related to the dissociative disorders. Culture-bound phenomena may explain the prevalence of some symptoms but cannot explain the cause. Somatic system disorders are not a facet of mood instability; however, depression may coexist with a somatic system disorder.