15.5 Obsessive-Compulsive and Related Disorders

What is a common characteristic of obsessive-compulsive disorder (OCD)?

• Complete absence of compulsions

• Pleasurable repetitive behaviors

• Intrusive and unwanted thoughts

• Lack of awareness of irrational thoughts

Which of the following is NOT a common obsession in OCD?

• Need for order and symmetry

• Desire for social interaction

• Doubts about safety

• Concerns about germs

What is a typical compulsion for someone with OCD?

• Playing sports

• Listening to music

• Repetitive hand washing

• Reading books

Body dysmorphic disorder involves:

• Preoccupation with a perceived physical flaw

• Fear of social situations

• Compulsive gambling

• Excessive need for cleanliness

Hoarding disorder is characterized by:

• Compulsive shopping

• Inability to discard possessions

• Excessive exercise

• Fear of open spaces

Which brain region is believed to play a critical role in OCD?

• Hippocampus

• Amygdala

• Cerebellum

• Orbitofrontal cortex

What neurotransmitter is NOT mentioned as being involved in OCD?

• Serotonin

• Dopamine

• Acetylcholine

• Glutamate

What is the estimated lifetime prevalence of OCD in the U.S. population?

• 1.0%

• 2.3%

• 5.0%

• 10.0%