because it is commonly believed that acetylcholine is a synaptic transmitter in the caudate nucleus and that the reduction of striatal biogenic amines in parkinson 's disease leads to acetylcholine supersensitivity in the caudate nucleus , we investigated the effects of the muscarinic blocking agent scopolamine on synaptic responses of neurons in the intact feline caudate nucleus and in the caudate nucleus depleted of dopamine by long-standing nigrostriatal lesions .
C0005496
biogenic amines
C0001041
acetylcholine