It is a natural response to disappointment, dejection, and stress. As a response, apathy is a way to forget about these negative feelings.[citation needed] This type of common apathy is usually only felt in the short-term and when it becomes a long-term or even lifelong state is when deeper social and psychological issues are most likely present.
Apathy should be distinguished from reduced affect display, which refers to reduced emotional expression but not necessarily reduced emotion.
Pathological apathy, characterised by extreme forms of apathy, is now known to occur in many different brain disorders[2], including neurodegenerative conditions often associated with dementia such as Alzheimer's disease,[3] and psychiatric disorders such as schizophrenia.[4] Although many patients with pathological apathy also suffer from depression, several studies have shown that the two syndromes are dissociable: apathy can occur independently of depression and vice versa.[2]