Figure 2
From: Monoamine oxidase-B (MAO-B) inhibitors: implications for disease-modification in Parkinson’s disease
Compensatory changes for dopamine loss in pre-symptomatic Parkinson's disease. Abbreviations: GPe, globus pallidus pars externa; GPi, globus pallidus pars interna; STN, subthalamic nucleus; SNc, substantia nigra pars compacta; GABA, gamma-aminobutyric acid. Solid arrows: excitatory glutamatergic connections; Dot arrows: inhibitory GABAergic connections; Dash dot arrow: dopaminergic connections.