because it has been proposed that the reduction of the striatal biogenic amines in parkinson 's disease leads to an imbalance between the actions of acetylcholine and dopamine , we have studied the effects of these substances , liberated from multibarrelled micropipettes , on the firing of single neurons in the feline caudate nucleus depleted of biogenic amines by long-standing nigrostriatal lesions .
C0001041
acetylcholine
C0005496
biogenic amines