PSL300H1 Chapter Notes -Patellar Reflex, Brainstem, Thalamus
Document Summary
Skeletal muscles cannot communication with one another directly, so they send messages to the cns allowing the integrating centers to take charge and direct movement. Most body movements are highly integrated, coordinated responses that require input from multiple regions of the brain: reflex, voluntary or rhythmic. Least complex; integrated at level of spinal cord or brain stem with higher center modulation. Learned movements that improve with practice, once learned may become subconscious (muscle memory) Intermediate complexity integrated in spinal cord with higher center (input required) However paralyzed animals can walk if they are supported on a moving treadmill and given an electrical stimulus to activate the spinal cpg governing that motion. As the treadmill moves the animal"s legs, the cpg, reinforced by sensory signals from muscle spindles, drives contraction of the legs muscles. Integrating center and relay station for sensory and motor info. (part of diencephalon) Brain stem, spinal cord (corticospinal tract), cerebellum, basal ganalia.
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