Subtle neurological injuries in pelvic fractures.

Eleven of 28 patients with a fracture of the acetabulum, pelvis, or sacrum were found to have electromyographic changes, apparently due to injury to the lumbosacral plexus. There appears to be a higher incidence associated with sacral fracture or sacroiliac separation (64%) than with acetabular fracture (24%). The EMG changes are diffuse and the clinical manifestations are subtle but the changes do interfere with the rehabilitation process.