ABSTRACT
Changes of ABR and LEDVEP in 60 patients with mild head injury and of ABR LEDVEP BEAM in 40 out of 60 patienites were studied. The results were as folls:we:①The Chief abnormality of ABR. was the prolongation of Ⅰ- Ⅲ interpeak latency ②The appaent abnomality of the LEDVEP was the prolongation of N70 latency and the drop of N70-P100 amplitude ③The characteristic change of BEAM was the incre ment of average ?1 power. The increment of ?/?2 power ratio suggested the presence of supertentorial lesions.According to the follow up study of clectrophysiological findings, a scale of brain dysfunction was created,It provides an objective criterion for clinical diagnosis and prognostic determination. In forensic practicl. Grade O and Ⅰ could be considered as minimal wound and Grade Ⅱ as slight wound,