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Motor tracts were electrically stimulated and identified by a handheld brain-mapping probe, the NY Tract Finder (NYTF). Sixteen-gauge plastic tubes were mounted onto the NYTF and inserted in the estimated direction of the motor tract with reference to navigational information. Only the NYTF was removed, leaving the plastic tubes in their places, immediately after muscle motor evoked potentials were recorded at the minimum stimulation current. Motor tracts were electrically identified in all cases. Three-dimensional information on the position of motor tracts was given by plastic tubes that were neurophysiologically placed. Tips of tubes showed the resection limit during tumor removal. Safe tumor resection with an arbitrary safety margin can be performed by adjusting the length of the plastic tubes. The motor tract positioning method enabled the 3D recognition of the motor tract by surgeons and provided for safe resection of tumors. Tumor resections were performed safely before damaging motor tracts, without any postoperative neurological deterioration.<\/jats:p>","DOI":"10.3171\/2017.5.jns162978","type":"journal-article","created":{"date-parts":[[2017,11,24]],"date-time":"2017-11-24T14:59:15Z","timestamp":1511535555000},"page":"576-582","source":"Crossref","is-referenced-by-count":6,"title":["An intraoperative motor tract positioning method in brain tumor surgery: technical note"],"prefix":"10.3171","volume":"129","author":[{"given":"Fumio","family":"Yamaguchi","sequence":"first","affiliation":[{"name":"Department of Neurosurgery for Community Health and"},{"name":"Department of Neurological Surgery, Nippon Medical School, Tokyo;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hirotomo","family":"Ten","sequence":"additional","affiliation":[{"name":"Department of Judo Therapy, Faculty of Health Care, Teikyo Heisei University, Tokyo;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tadashi","family":"Higuchi","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, Nippon Medical School, Tokyo;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomoko","family":"Omura","sequence":"additional","affiliation":[{"name":"Neurological Institute, Nippon Medical School Chiba Hokusoh Hospital, Inzai;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toyoyuki","family":"Kojima","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Yotsuya Medical Cube, Tokyo;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Koji","family":"Adachi","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, Nippon Medical School Musashi-Kosugi Hospital, Kawasaki;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takayuki","family":"Kitamura","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, Nippon Medical School Musashi-Kosugi Hospital, Kawasaki;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shiro","family":"Kobayashi","sequence":"additional","affiliation":[{"name":"Neurological Institute, Nippon Medical School Chiba Hokusoh Hospital, Inzai;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Takahashi","sequence":"additional","affiliation":[{"name":"Department of Neurosurgery, Kasugai Rehabilitation Hospital, Fuefuki; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akira","family":"Teramoto","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, Nippon Medical School, Tokyo;"},{"name":"Tokyo Rosai Hospital, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akio","family":"Morita","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, Nippon Medical School, Tokyo;"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"key":"b1","series-title":"J Neuroanaesth Crit Care","doi-asserted-by":"publisher","first-page":"2","DOI":"10.4103\/2348-0548.124832","article-title":"Anaesthetic considerations for evoked potentials monitoring","volume":"1","author":"Bithal PK","year":"2014","unstructured":"Bithal PK: Anaesthetic considerations for evoked potentials monitoring. 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