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Figure 3: Nerve conduction study of a 52-year-old male with hereditary motor sensory neuropathy showing slowing of conduction velocity and reduced CMAP in (A) ulnar (16.8 m/s; 0.9 mV and 0.8) and median (22 m/s; 0.5 and 0.6 mv) motor conductions. His peroneal and sural conductions were unrecordable. (C) Peroneal conduction study of his son who was asymptomatic showed slowing of conduction velocity (23.6 m/s). (D) Photograph of the patient and his sister and son suggesting AD in heritance. There was wasting and weakness of small muscles of hands and feet of the patient and high-arched feet of the sister and son (inset)

Figure 3: Nerve conduction study of a 52-year-old male with hereditary motor sensory neuropathy showing slowing of conduction velocity and reduced CMAP in (A) ulnar (16.8 m/s; 0.9 mV and 0.8) and median (22 m/s; 0.5 and 0.6 mv) motor conductions. His peroneal and sural conductions were unrecordable. (C) Peroneal conduction study of his son who was asymptomatic showed slowing of conduction velocity (23.6 m/s). (D) Photograph of the patient and his sister and son suggesting AD in heritance. There was wasting and weakness of small muscles of hands and feet of the patient and high-arched feet of the sister and son (inset)