P.164 Analysis of MNI OR log book over Dr Wilder Penfield`s Career: Practice profile of epilepsy cases

Background: Dr. Penfield was a pioneer in neurosurgery and his contribution continues to impact the practice today. Our objective is analyze epilepsy surgeries during career. Methods: Analysis of original operating room books from 1934-1960. Results: He performed 2338 procedures 601 (26%) epilepsy, 524 (22%) oncology, 441 (19%) general neurosurgery, 379 (16%) functional, 230 (10%) spine, 80 (3%) trauma, 54 (2%) vascular, 29 (1%) nerves. Epilepsy cases were divided: local vs. anesthesia focal resection or lobectomy. From 1934-1945 he 167 procedures, 146 with resection. 1946-1950 223 introduction lobectomies 30. Most right-side under anesthesia. 1951-1955 152 88 resection, 64 lobectomies. 1956-1960 59 surgeries, similar number Conclusions: To our knowledge this most complete comprehensive account surgical In early years patients treated through large craniotomies EEG stimulation tailor resections now known as “Montreal procedure”. This led better understanding human cortex division brain functions. During later years, there reduction done increase