would s skeletal muscle be able to contract if a the upper m

would s skeletal muscle be able to contract if

a/ the upper motor neuron supplying it were destroyed ?

b/ the lower motor neurons supplying it were destroyed ?

Solution

skeletal muscle is innervated by somatic nerves which controle volunatry movements. skeletal muscle fibers innervated by alpha motor neurons which situated in gray horn of spinal cord which are considered as lower motor neurons. these lower motor neurons are under controle of upper motor neurons. so lower motor neurons are final common pathway of motor system. if any damage to lower motor neurons that cause loss of movement of skeletal muscle, loss of muscle tone, atrophy of muscle. so lower motor neurons lesions muscle is not able to contract or proper function. ..answer is muscle able to contract if the upper motor neron supplying it were destroyed shows hypertonia