ABEM (EDX)

Practice session

A 62-year-old man with a 6-month history of progressive weakness, dysphagia, and cramps has widespread fasciculations and wasting. EMG shows fibrillations, positive sharp waves, fasciculations, and large-amplitude, long-duration polyphasic MUAPs with reduced recruitment in muscles of three extremities and bulbar muscles. NCS shows normal sensory responses. What is the most likely diagnosis?

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