Movement And Posh Tu W

Neuromuscular Spindles

muscle spindle

(Sappey)

spindle), and neuromuscular junction (+)

lumbar spinal cord in cross-section

Figure 1.7. The myolatic stretch reflex. A 3-foot vertical jump momentarily stretches muscle spindles in all the extensor (anti-gravity) muscles of the lower extremities. The spindles then provide direct (monosynaptic) and almost immediate facilitatory input (+ in ventral horn of spinal cord) lo extensor molor neurons, resulting in strong reflex contraction of the individual muscles.

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