Quiz 06/22/2022

A 56-year-old female presents to the clinic with right posterior leg pain. On examination, there is decreased sensation of the right posterior calf and weakness in right ankle plantarflexion. EMG testing shows fibrillations of the gastrocnemius and gluteus maximus muscles. EMG testing of the tibialis anterior, gluteus medius, and tensor fascia lata were normal. What is the most likely etiology of this patient’s symptoms?

A 46-year-old female presents to the clinic with right-hand numbness, specifically in the 4th and 5th digits. EMG testing reveals fibrillations on the first dorsal interosseous, and flexor pollicis longus. EMG testing of the abductor pollicis brevis and triceps was unremarkable. These findings are most likely caused by radiculopathy of which of the following nerve roots?

The paraspinal muscles are innervated by which of the following?

Which of the following dermatomes lies closest to the T2 dermatome, relative to the topographical position on the skin?

Which of the following dermatomes are correctly matched with their associated anatomical location?

A 67-year-old male wakes up with a painful, right-sided, itchy rash coming across his abdomen like a band involving the umbilicus. His primary care provider is concerned that the patient has shingles. For this patient, re-activation of the varicella-zoster virus occurred at the dorsal root ganglion at which thoracic level?

Which of the following features on EMG is suggestive of chronic denervation?

A 45-year-old male presents with left-sided neck and shoulder pain. On examination, there is right arm abduction weakness and decreased bicep and brachioradialis reflexes. An EMG was ordered and showed fibrillations of the deltoids, supraspinatus, and biceps muscles. EMG testing of the triceps, first dorsal interosseous, abductor policies brevis, and rhomboid muscles were normal. These findings are most likely due to radiculopathy of which of the following nerve roots?

Which of the following muscles is solely innervated by the C5 nerve root?

A 55-year-old male presents to the clinic with a complaint of right lower extremity pain and weakness. On examination of the right lower extremity, there is decreased sensation to pinprick on the medial calf and foot, 4/5 strength with knee extension, and a mute patellar reflex. These findings are most likely due to radiculopathy of which of the following nerve roots?