QS Study

Functions of Pyramidal and Extrapyramidal Tract

Pyramidal Tracts: These tracts originate in the cerebral cortex, carrying motor fibers to the spinal cord and brain stem. They are responsible for the voluntary control of the musculature of the body and face. An example of a classic disorder of the pyramidal system is a stroke, resulting in paralysis of an extremity.

Functions of pyramidal tract

  • Convey motor impulses to the spinal cord for controlling the voluntary movement of the body.
  • Also form a part of the pathways for some superficial reflexes like cremasteric, abdominal reflex.

Fig: Pyramidal and Extrapyramidal Tract

Extrapyramidal tracts: They are responsible for the involuntary and automatic control of all musculature, such as muscle tone, balance, posture, and locomotion. The extrapyramidal pathway is actively involved in the initiation and selective activation of movements, along with their coordination.

Functions of extrapyramidal tract

  • Control tone, posture, and equilibrium of the body.
  • Control automatic association of movement.
  • Form the platform for the action of the pyramidal tract.
  • In the case of pyramidal lession, the extrapyramidal tract can perform some function.