Clinical and electrodiagnostic findings were analyzed retrospectively in 25 brachial plexus injury patients who underwent electrodiagnoses during the period of one and a half years from March 1, 1988 to August 31, 1989 in the electrodiagnosis laboratory of the Department of Rehabilitation Medicine in Chungnam National University Hospital.
Peripheral nerve conduction studies, paravertebral muscle needle electromyography and median nerve somatosensory evoked potential (SSEP) study were included in the electrodiagnosis of brachial plexus injury.
Among 25 patients 22(88％) were male.with 16 patients(64％) in their third and fourth decades. Traffic accident was the leading cause of injury followed by industrial accidents and direct trauma. According to the electrodiagnostically determined level of injury, 17 patients had postganglionic lesion, 5 preganglionic and 3 pre & postganglionic lesion. There were 17 whole arm type, 5 Erb´s type, and 3 Klumpke´s type injuries. Among 15 patients who underwent SSEP study, 10 patients showed abnormal N9 and N20 potentials, 4 of whom had normal sensory nerve action potentials.
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