A 60-year-old man has had mild weakness of the proximal muscles of the upper and lower extremities for the past several months. He was recently diagnosed with small cell carcinoma of the lung Reflexes are hypoactive. The amplitude of the compound motor action potential elicited in response to a single supramaximal electrical stimulus is small but increases significantly with repetitive stimulation at a frequency of 30 Hz Which of the following is the most likely site of the deficit? Cerebral cortex Spinal cord Peripheral nerve Muscle spindle Neuromuscular junction

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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  1. A 60-year-old man has had mild weakness of the proximal muscles of the upper and lower extremities for the past several months. He was recently diagnosed with small cell carcinoma of the lung Reflexes are hypoactive. The amplitude of the compound motor action potential elicited in response to a single supramaximal electrical stimulus is small but increases significantly with repetitive stimulation at a frequency of 30 Hz Which of the following is the most likely site of the deficit?
  2. Cerebral cortex
  3. Spinal cord
  4. Peripheral nerve
  5. Muscle spindle
  6. Neuromuscular junction
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