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Motor system - Coggle Diagram
Motor system
Critical neurons
corticospinal neurons
located in PMC
force of movement
direction of movement
extent of movement
Speed of movement
Medium spiny neurons
Located in the striatum
Excitability modulated by dopamine
Initiation/suppression of movement
CPG
local neural circuitry independent of phasic sensory input
generates rhythm
breathing, locomotion(coordination & flexor-extensor)
Mirror neurons
ventrolateral subdivision of premotor cortex
encoding intentions to make specific movement based on observation of movement of others
Motor units
fatigueable resistant motorunits
fast fatiguable
Slow
Brain regions in movement
Primary motor cortex
Planning/selection/execution of movement
Parietal cortex
Intention to move/awareness
important for incorporating visual cues
Basal ganglia
Putamen and caudate(nigristriatal pathway)
Initiation of wanted movement/Suppression of unwanted
Cerebellum
Coordination of ongoing behavior
Regulation of equilibrium
Adaptation of movement through feedforward internal model
Cell types
Purkinje cells
Main output of cerebellum
Granule cells
Mossy fibers
Parallel cells
Descending tracts
corticospinal tract
subcategories
Ventral corticospinal tract
Lateral corticospinal tract
corticobulbar tract
Originates in PMC
Terminate on motor nuclei in the cranial nerves
Supplies musculature of head and neck
Locomotion