For example, Parkinson's disease is hypothesized to be a result of excessive inhibitory pathway activity, which explains the slow movement and cognitive deficits, while Tourettes is proposed to be a result of excessive excitatory activity resulting in the tics characteristic of Tourettes.
12.
For example, in Parkinson's disease, degeneration of dopaminergic neurons leading to decreased activity of the excitatory pathway is thought to result in hypokinesia, and in Huntington's disease, degeneration of dopaminergic neurons driving the inhibitory pathway is thought to result in the jerky body movements.
