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Motor System - Basal Ganglia - Coggle Diagram
Motor System - Basal Ganglia
Nuclei
Striatum
Caudate nucleus
Putamen
Globus pallidus
Internal sengment
External segment
Substantia nigra
Pars reticulata
Pars compacta
Subthalamic nucleus
Input / Output Zones
Input Route
Cotex / Brainstem
Striatum
Globus pallidus
Substantia nigra
Output
Globus pallidus (GP)
Substantia nigra (SN)
Medium Spiny Neurons (MSN) of Striatum
Inputs to striatum
Projects to GPi and GPe
Collaterals from corticocortical, corticothalamic and corticospinal pathways form
excitatory glutamatergic synapes
on dendritic spines
Convergence
MSN contacted by many axons
Allows integration
Divergence
MSN contacted by same the same axon
Functions
Start Movement
Stop movement
Modulate movement
Pathways
Direct
Initiate Motor Movements
Indirect
Inhibition of motor activity
Nigrostriatal
Modulation of motor activity
Nuclear circuit
