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Medicine, 18.04.2020 01:59 july00

ALS (Amyotrophic Lateral Sclerosis) causes the death of motor neurons that innervate skeletal muscle fibers. In the early stages of the disease, the axons of the remaining motor neurons can branch off and form synapses with skeletal muscle fibers that were previously innervated by the dead motor neurons (this is an example of neuroplasticity). Based on this information, which of the following statements is INCORRECT: a. Exciting a single motor neuron in someone with early stage ALS will contract more skeletal muscle fibers within an affected muscle compared to someone without ALS. b. Someone with early stage ALS may have only slightly diminished skeletal muscle strength but large declines in fine motor control. c. In someone with early stage ALS, skeletal muscle fibers innervated by living motor neurons will respond to a single motor neuron action potential with a twitch contraction. d. The number of motor units in affected skeletal muscle will be greater in someone with early stage ALS compared to someone without ALS.

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ALS (Amyotrophic Lateral Sclerosis) causes the death of motor neurons that innervate skeletal muscle...

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