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OVERVIEW OF THE MOTOR NERVOUS SYSTEM Prof. Vajira Weerasinghe Dept of Physiology
Components of the motor system ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Spinal level ,[object Object],[object Object]
Brain stem level ,[object Object],[object Object]
Cortical level ,[object Object]
cerebellum ,[object Object],[object Object],[object Object]
Basal ganglia ,[object Object],[object Object],[object Object],[object Object]
Premotor cortex and SMA ,[object Object],[object Object]
Functional role of primary and secondary motor areas ,[object Object],[object Object],[object Object],[object Object],[object Object],SMA PMC MI CST Motor units
plan execute memory, emotions idea ,[object Object],[object Object],motor cortex movement basal ganglia cerebellum cerebellum
hierarchical motor control  muscles lower motor neuron upper motor neuron primary motor area premotor area SMA cerebellum basal ganglia
hierarchical motor control a lesion at a lower level muscles lower motor neuron upper motor neuron primary motor area premotor area SMA cerebellum basal ganglia x eg. carpal tunnel syndrome
hierarchical motor control a lesion at a higher level muscles lower motor neuron upper motor neuron primary motor area premotor area SMA cerebellum basal ganglia x eg. Parkinsonism
[object Object],[object Object],[object Object]

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Motor system6 overview3

  • 1. OVERVIEW OF THE MOTOR NERVOUS SYSTEM Prof. Vajira Weerasinghe Dept of Physiology
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9.
  • 10.
  • 11. hierarchical motor control muscles lower motor neuron upper motor neuron primary motor area premotor area SMA cerebellum basal ganglia
  • 12. hierarchical motor control a lesion at a lower level muscles lower motor neuron upper motor neuron primary motor area premotor area SMA cerebellum basal ganglia x eg. carpal tunnel syndrome
  • 13. hierarchical motor control a lesion at a higher level muscles lower motor neuron upper motor neuron primary motor area premotor area SMA cerebellum basal ganglia x eg. Parkinsonism
  • 14.