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A 25-year-old male with a history of brachial plexopathy presents to the Neuromuscular lab for electromyography. The video below is a recording of his EMG of the triceps muscle when activated. The abnormal findings shown represent which of the following?
A 37-year-old female with a PMH of Sjogren’s, and a recent motor vehicle accident (MVA) is referred to the EMG Lab for evaluation of right arm pain/weakness. The patient endorses right head pain which radiates down her neck into the right shoulder and wrist. Examination shows 5/5 strength in the upper extremities except for 4+/5 deltoid and 4+/5 biceps strength in the right upper extremity. Sensation to light touch was intact throughout. Sensory nerve conduction studies of the right upper extremity were normal. Based on the patient’s EMG results outlined below what is the most likely diagnosis?
A 6-month-old full-term female is referred to the clinic with persistent right shoulder and elbow weakness since birth. Which of the following is the most likely pathologic lesion?
A 45-year-old female who is a professional pianist was referred to the EMG lab for right-hand numbness and tingling. Based on the EMG data outlined below where is this patient’s pathological lesion?
A 50-year-old male has noted winging of his right scapular and pain for the past four months following a hyperextension injury. Based on the EMG data outlined below where is this patient’s pathological lesion?
This EMG video of the biceps femoris muscle at rest could be associated with which of the following pathologies?
A 57-year-old male with a past medical history of progressive weakness affecting all extremities and dysphagia for the past 6 months is admitted to the hospital. An EMG was completed as part of his workup and is shown below. Based on the available information what is the most likely diagnosis?
Patients with Charcot-Marie Tooth disease that have the CMT1A phenotype will have which of the following genetic mutations?
A 45-year-old male with a history of C6 radiculopathy presents to the neuromuscular lab for electromyography. The video below depicts spontaneous findings while evaluating the biceps brachii muscle during electromyography. What is the abnormal pattern shown?
A patient with right leg weakness presents to the neuromuscular lab for electromyography. The image below depicts a spontaneous finding while evaluating the right tibialis anterior muscle. This finding is most consistent with which of the following?
With of the following CMT types present with an axonal pre-dominant peripheral neuropathy?
A 19-year-old male was admitted to the hospital with a 2 weeks history of progressive lower extremity weakness. CSF studies showed an elevated CSF protein and normal WBC count. MRI of the lumbar spine showed contrast enhancement of the cauda equina. His nerve conduction study (NCS) is shown below. What is the most appropriate next step in medical management?
Submaximal muscle stimulation is used during which of the following aspects of the nerve conduction study?
What is the earliest NCS/EMG abnormality found in AIDP?
A neurology consult was placed for a 35-year-old male who was admitted overnight after a motor vehicle accident that occurred earlier in the day. He experienced multiple bone fractures, including the right humerus at the spiral groove. The primary team is concerned about a radial nerve injury. Which of the following findings are most likely to be found on EMG/NCS?
A 71-year-old male with a history of mild ankle weakness and balance issues for the last 6 years is referred to the lab for a nerve conduction study (NCS). While performing the testing the patient states that a few of his siblings, as well as his father, had similar issues. Examination showed high arches and hammertoes. Based on the clinical history and NCS, what is the most likely diagnosis?
A 21-year-old female was admitted to the hospital with a 3 weeks history of progressive lower extremity weakness. An EMG was performed and the results were shown below. Based on the clinical history, examination, and diagnostic testing, the patient was started on plasma exchange (PLEX) therapy. After completing her PLEX therapy there was a marked improvement in her weakness. Although not shown below, which of the following additional NCS/EMG results were also likely present on the day of recording?
Which of the following is most likely to show temporal dispersion of the action potential?
Which is the following findings on EMG is suggestive of a chronic neurogenic lesion?
Mild cases of carpal tunnel syndrome will have which of the following findings on electromyography (EMG)?