the aadc-positive axons appear to represent the intrinsic 'amine-handling ' neurons rather than intrinsic tryptaminergic neurons or extrinsic dopaminergic neurons , and the effect on aadc activity of removing the extrinsic nerve supply suggests that this normally exerts some restraining influence on the metabolism of the 'amine-handling ' population .
C0004461
axons
C0027882
neurons