They are symptoms classically associated with depression, however, they differ in PD-affected people in treatment, mechanism, and do not always occur with depression. Apathy presents in around 16.5-40%. Symptoms of apathy include reduced initiative/interests in new activities or the world around them, emotional indifference, and loss of affection or concern for others.[1] Apathy is associated with deficits in cognitive functions including executive and verbal memory.[2]