Examination of the legs may show a loss of muscle control over the legs and feet. The foot or leg muscles may atrophy (lose mass). There is difficulty with dorsiflexion (lifting up the foot and toes) and with eversion (toe-out movements).
Muscle biopsy or a nerve biopsy may confirm the disorder, but they are rarely necessary.
Tests of nerve activity include:
Other tests are guided by the suspected cause of the nerve dysfunction, as suggested by the person's history, symptoms, and pattern of symptom development. They may include various blood tests, x-rays, scans, or other tests and procedures.
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