PROGNOSTIC VALUE OF CORTICAL MAGNETIC STIMULATION IN SPINAL-CORD INJURY

Cortical magnetic stimulation was performed in a consecutive series of 10 patients presenting within 15 days of traumatic spinal cord injury . In those patients with complete paraplegia or quadriplegia, motor ev oked potentials at presentation were absent below the level of the les ion. Six months after the injury, potentials had returned in the bicep s brachii and abductor pollicis brevis muscles in some quadriplegic ca ses, but remained absent from the tibialis anterior in all of this gro up. None of those with a complete lesion made a significant functional recovery. Of the three patients with incomplete quadriplegia, two sho wed a significant recovery after 6 months. Motor evoked potentials wer e recordable below the level of the lesion at presentation in these ca ses, although the latencies were prolonged. In the remaining patient w ho failed to improve, potentials were unrecordable throughout the stud y. This small pilot study suggests that cortical magnetic stimulation may be useful in refining the prognosis in patients with an incomplete spinal cord injury.