No matter the cause is, Parkinson's derives from the death of dopamine-producing, or dopaminergic, neurons in the substantia nigra.

无论如何，帕金森源于黑质中生产多巴胺的神经（即多巴胺能神经）死亡。

So, here, inside this dopaminergic neuron, dopamine is synthesized in a two-step process starting with the amino acid tyrosine.

所以，在多巴胺能神经元内部，多巴胺是通过两个步骤合成的从氨基酸酪氨酸开始。

In addition to that, these same dopaminergic neurons also exert inhibitory effects on the excitatory cholinergic neurons in the striatum.

除此之外，多巴胺能神经元也有同样的抑制作用纹状体的兴奋性胆碱能神经元。