• In a longitudinal study of 119 patients with minor head injuries, 13 had abnormal auditory brain-stem responses (ABRs) within 48 hours after trauma. At follow-up examination one month later, ten patients had abnormal ABRs. The ABRs remained stable in most patients; in nine patients they normalized. However, in six patients initially normal ABRs became abnormal. This instability limits the medicolegal application of ABR testing after minor head injury.
Schoenhuber R, Gentilini M, Scarano M, Bortolotti P. Longitudinal Study of Auditory Brain-Stem Response in Patients With Minor Head Injuries. Arch Neurol. 1987;44(11):1181-1182. doi:10.1001/archneur.1987.00520230061015