Motor System

increase in

dopamine activity

on intact side

(reflects release)

Striatum

Effect

if you

administer

apomorphine

if you

administer

amphetamine

animal turns

toward the lesion

(away from striatum

that has the greatest

activity)

increase in

dopamine activity

on both sides

(dopamine receptor

activation)

animal turns

away from the lesion

(away from striatum

that has the greatest

activity)

receptor supersensitivity

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