[Disruption of motor habits in tumors of the premotor zone of the frontal lobe].

The report is concerned with the character of disordered complex automated movements in a group of patients with frontal lobe tumors. These disorders were studied with the aid of a neuropsychological technique elaborated by prof. Luria. A crude disautomation of voluntary movements appeared in cases of tumors of the supra-convexital area of the premotor zone. In lesions of the deep area of posterior frontal area with an involvement into the process of the subcortical structures an inertness in the motor sphere was registered.