Delirium Flashcards
- disturbance of consciousness (reduced clarity of awareness of the environment with reduced ability to focus, sustain or shift attention)
- a change in cognition (memory deficit, disorientation language disturbance) or development of perceptual disturbance
delirium
the disturbance develops over a ______ period of time (hours to a few days) and tends to fluctuate in ________
short, severity
the disturbances are not better explained by another __________ disorder and don’t occur in the context of a reduced level of _______
neurocognitive, arousal
when oxygen delivery to the brain tissue falls
anoxia
in anoxia ______ floods cells and ______ flows out of cells
sodium and calcium, potassium
calcium influx accelerates tyrosine hydroxylase, increasing _______ production
dopamine
calcium influx stimulates ______ release
neurotransmitter
decreased oxygen results in breakdown of ATP dependent transporters thus decreasing ____________
neurotransmitter reuptake
decreased oxygen decreases ___________ activity, therefore can’t convert dopamine to noepinephrine
dopamine-beta-hydroxylase
hypoxic condition shifts dopamine metabolism to more toxic oxidative paths generating _______
cytotoxic quinones (6-OHDA)
psychopharmacology treatment?
dopamine antagonists
what dopamine antagonist is the most pure antipsychotic?
haloperidol, D2 target