Which brain region is involved in decision-making and is hypoactive in depression?
Prefrontal Cortex (PFC)
What emotional functions are primarily regulated by the amygdala in depression?
Emotion processing, particularly fear and sadness
Which brain area affects memory and concentration and shows reduced size in depression?
Hippocampus
What role does the hypothalamus play in depression?
Regulates appetite and sleep; involved in neurovegetative symptoms like anhedonia
What depression-related symptom is the basal ganglia linked to?
Psychomotor agitation or retardation
What is the role of glial cells in depression?
Support neurons, stabilize glutamate, and produce BDNF
What does BDNF do in the brain?
Promotes neuroplasticity and neurogenesis
What effect do antidepressants have on BDNF?
Normalize BDNF levels and promote neuroplasticity
What hormones are involved in HPA axis overactivation?
CRF (corticotropin releasing hormone) → ACTH → Cortisol
What is the impact of excess cortisol on the brain?
Causes hippocampal atrophy and persistent HPA activation
What labs are commonly ordered to rule out medical causes of depression?
TSH, B12, CBC (for anemia), urinalysis
What are the core DSM-5 criteria for Major Depressive Disorder (MDD)?
At least 1 major depressive episode, no history of mania/hypomania, ≥5 symptoms including depressed mood or anhedonia for ≥2 weeks
What mnemonic helps remember MDD criteria?
SIGECAPS(S): Sad mood, Interest loss, Guilt, Energy, Concentration, Appetite, Psychomotor, Sleep, Suicide
What is considered full remission in MDD?
No symptoms for at least 2 months
Which nutritional supplements have evidence for improving depression?
Folate (vitamin B9) and omega-3 fatty acids (650–1200 mg EPA + DHA daily)
What should be done if there’s only 20% improvement in 4–6 weeks?
Consider maximizing the dose before switching medications
How long should antidepressants be continued after symptom remission?
At least 6–12 months
Why is bupropion contraindicated in eating disorders?
Increased seizure risk
Which atypical antipsychotics are FDA-approved as adjuncts for treatment-resistant depression?
Aripiprazole and quetiapine
What is Deplin (L-methylfolate) used for in depression?
Augmentation, especially in patients with folate deficiency
Which agent is preferred for an overweight, hypersomnolent patient?
Bupropion (activating, weight-neutral)
Which SSRI is best avoided in pregnancy?
Paroxetine (Paxil)
What is the minimum duration of symptoms required for a diagnosis of Generalized Anxiety Disorder (GAD)?
≥6 months
What are first-line treatments for GAD?
SSRIs such as escitalopram, paroxetine, sertraline