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N30 Neurology
Movement Disorders
Toronto Notes 2019
Motor cortex Premotor cortex Supplementary motor area
Glutamate
Glutamate
Substantia nigra pars compacta
Dopamine
Dopamine
Glutamate
Excitatory connections Inhibitory connections
Globus pallidus pars externa
Ventrolateral thalamus
INDIRECT PATHWAY
GABA
DIRECT PATHWAY
GABA
Subthalamic nucleus
Globus pallidus pars interna
Pedunculopontine nucleus
Figure 20. Neural connections of the basal ganglia
Genu of corpus callosum
Lateral ventricle Caudate nucleus
Putamen Globus pallidus
Third ventricle
Thalamus
Lateral ventricle (trigone)
Splenium of corpus callosum
© Lucy Zhang 2011
Figure 21. Horizontal section of basal ganglia
Putamen
GABA GABA enkephalin substance P
© Susan Park 2009