Abstract
A prospective study of 100 patients with neurologic deficits due to their first attacks of sciatica was performed. Characteristic motor patterns for L3-4, L5 and S1 root lesions were found. L3-4 lesions (17%) were significantly more common in 60+ age group. Lesions of L5 were significantly more common than S1 (approximately 2:1), a result which differs from all other major series. Sensory disturbance (62%) was never present within motor loss and had poor localizing value.

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