Kinesiology 1080A/B Lecture 12: Kin lecture 12 - February 8

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 1080A/B
• Professor: Matthew Heath

Document Summary

Spinal cord: afferent fibers (sensory) fibers occupy the external lateral portions of the spinal cord. The smaller muscle is an intrafusal muscle fiber detects stretch: monosynaptically connect to a alpha motor neuron. Cc (cerebral cortex) modulates action of motor neurons in the brain stem and spinal cord: corticobulbar tract: motor neuron activity organized by cerebral cortex. Corticobulbar fibers e(cid:454)te(cid:374)d for(cid:373) the (cid:373)otor (cid:272)orte(cid:454) to the (cid:862)(cid:271)ul(cid:271)(cid:863) (i. e. the brain stem) Control facial musculature and muscles of mastication (i. e chewing and speaking: upper- and lower- motorneurons. Contralateral connection (opposite side connection: which connection depends on the part of the body being controlled. The red line is fusing with the alpha motor neuron. Lower motor neuron injury (cid:272)a(cid:374)"t i(cid:374)(cid:374)er(cid:448)ate its upper a(cid:374)d lo(cid:449)er (cid:373)us(cid:272)les o(cid:374) the left side complete paralysis. Easy way to see if they have an infection or something is wrong with their cerebral cortex.