Intermittent cervical traction: a progenitor of lumbar radicular pain.

Twelve patients treated with cervical traction for complaints of cervical radicular pain subsequently developed lumbar radicular discomfort. Intermittent cervical traction therapy had been initiated at 15 pounds and increased to 30 pounds. Lumbar spine roentgenographs in four patients demonstrated a transitional lumbar vertebrae and ten patients had evidence of spinal osteoarthritis with associated degenerative changes. Abnormal electroneuromyographs were found in four patients. In two additional patients with normal electromyographs, the spinal evoked potentials were asymmetrically slowed suggesting chronic lumbar root compromise. The onset of lumbar radiculopathy after intermittent cervical traction suggests that axial tension induced in the spinal cord's dural coverings can be transmitted to lumbar nerve roots. When these structures are tethered by anatomic variants and/or associated degenerative changes, spinal root excursion may be limited, and lumbar pain may be precipitated by traction.