Apathy and Anhedonia in Parkinson's Disease

Table 1

DSM-IV criteria of major depression.

	Items
(1)	Depressed mood
(2)	Loss of interest or loss of pleasure
(3)	Significant weight loss or loss of appetite
(4)	Insomnia or hypersomnia
(5)	Psychomotor agitation or retardation
(6)	Fatigue or loss of energy
(7)	Feelings of worthlessness or excessive or inappropriate guilt
(8)	Diminished ability to think or concentrate, or indecisiveness
(9)	Suicide attempt or a specific plan for committing suicide