Mood disorders

Question 1

Major depressive episode (definition)

Answer 1

State in which a person experiences lingering depressed mood/diminished interest in pleasurable activities along with symptoms such as weight loss and sleep difficulties

Question 2

Major depressive disorder (possible causes)

Answer 2

Life events
Social disorder/interpersonal issues (Coyne J 1976)
https://www.tandfonline.com/doi/abs/10.1080/00332747.1976.11023874
Loss of reinforcement (Lewinsohn 1974)
Disorder if thinking (Beck A 1976 & 1987)
Uncontrollable events (learned helplessness, Seligman 1975 & Overmeir & Seligman 1967)
Biology

Question 3

Bipolar disorder

Answer 3

History of manic episodes with dramatically elevated mood, decreased need for sleep, inflated self-esteem, increased talkativeness and irresponsible behaviour