ABPN Clinical Neurophysiology
Motor Neuron DiseaseEnglish
Exam overviewPractice session
A 60-year-old man has progressive weakness without sensory loss. EMG shows active denervation (fibs + PSWs) with chronic reinnervation (long-duration, high-amp polyphasic MUAPs) in bulbar, cervical, thoracic, and lumbosacral regions with normal sensory NCS. This pattern supports:
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