The city of Leningrad. Institute of Experimental Medicine of the Academy of Medical Sciences of the USSR; operating room, computing center, laboratories. Research, operations for patients with organic brain damage. Operations are carried out by Candidate of Medical Sciences A.N. Orlova. Postoperative observation of patients. The film stars: Professor N. P. Bekhtereva, director of the institute, professor D. A. Biryukov, doctor-mathematician Yu. G. Ivannikov, candidate of medical sciences, neuropsychiatrist V. M. Smirnov.