from these results , we conclude that , ( i ) in cats with nigrostriatal tract lesions after low doses of l-dopa comparable to those given to patients with parkinson 's disease , the bulk of the newly formed da in the caudate nucleus is contained in nigrostriatal neurons , and ( ii ) there exists an inverse relationship between the ability of the caudate to synthesize da and the severity of the nigrostriatal tract lesion .
C0023570
l-dopa
C0030567
parkinson 's disease