UTILIZATION BEHAVIOR AND CONCOMITANT MOTOR NEGLECT BY BILATERAL FRONTAL-LOBE DAMAGE

We reported on a patient who had bilateral mesial frontal lesions, pre sumably of a primary cerebral malignant lymphoma. The patient presente d with a combination of unusual behavioral disorders of the upper extr emities, which has not yet been documented in the literature: bilatera l utilization and imitation behaviors and motor neglect of the left ar m. Utilization behavior was closely associated with bilateral manual g rasping behavior and was caused by the bifrontal lesions. Damage to th e right supplementary motor area resulted most likely in concomitant m otor neglect of the left hand. Discussion includes differentiation fro m other related behavioral disorders.