Its called Anhedonia

My experience is that it is partially related to my dopamine levels. I am better when I have adequate medication but it is in the background even then. There hasnt been alot of research but i understand it can be connected with depression but not necessarily.


"Anhedonia is defined by a lowered ability to experience pleasure. It is recognized to be a core symptom of major depression, and approximately 30%–40% of subjects with Parkinson’s disease (PD) have significant depression.1 However, independently of the occurrence of depression in PD patients, anhedonia can be considered to be a specific mood disorder explained by dysfunction of the dopamine reward pathway secondary to the degenerative processes observed in PD, notably in the mesolimbic area."
http://neuro.psychiatryonline.org/ar...icleID=1476853