{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T10:05:39Z","timestamp":1780653939558,"version":"3.54.1"},"reference-count":11,"publisher":"Scientific Scholar","content-domain":{"domain":["surgicalneurologyint.com"],"crossmark-restriction":true},"short-container-title":[],"abstract":"\n Background:<\/jats:title>\n Neurological deterioration during cervical laminoplasty for ossification of the posterior longitudinal ligament (OPLL) remains a significant clinical concern. This study evaluated the utility of somatosensory evoked potential (SEP) monitoring initiated immediately after anesthetic induction as an early warning system during surgical positioning.<\/jats:p>\n <\/jats:sec>\n \n Methods:<\/jats:title>\n We retrospectively reviewed 63 consecutive patients with cervical OPLL who underwent laminoplasty (2023\u20132026). SEP monitoring of all four limbs was initiated in the supine position after induction to establish the intraoperative baseline. Alarm thresholds were 70% (caution) and 50% or below (critical) of baseline amplitudes in any monitored limb. Neurological status was assessed using the modified Japanese Orthopaedic Association (mJOA) scale.<\/jats:p>\n <\/jats:sec>\n \n Results:<\/jats:title>\n Positioning-related SEP deterioration occurred in 8 patients (12.7%); all were detected before skin incision, and resolved following positional correction (i.e., typically in the opposite direction). No patient developed a permanent neurological deficit. Transient C5 palsy occurred in two patients in the no-SEP-change group that resolved within 3 weeks. All patients demonstrated mJOA improvement at 3 months.<\/jats:p>\n <\/jats:sec>\n \n Conclusion:<\/jats:title>\n SEP monitoring detected significant changes during positioning for laminoplasty in 12.7% of OPLL patients, all of which resolved in a timely fashion.<\/jats:p>\n <\/jats:sec>","DOI":"10.25259\/sni_462_2026","type":"journal-article","created":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T09:21:40Z","timestamp":1780651300000},"page":"337","update-policy":"https:\/\/doi.org\/10.25259\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Early somatosensory evoked potential monitoring warnings during positioning for cervical laminoplasty in ossification of the posterior longitudinal ligament patients"],"prefix":"10.25259","volume":"17","author":[{"given":"Hiroshi","family":"Inagaki","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"10894","published-online":{"date-parts":[[2026,6,5]]},"reference":[{"key":"10.25259\/SNI_462_2026\/ref-1","doi-asserted-by":"crossref","first-page":"104S","DOI":"10.1177\/2192568219859314","article-title":"The use of intraoperative neurophysiological monitoring in spine surgery","volume":"10","author":"Charalampidis","year":"2020","journal-title":"Global Spine J"},{"key":"10.25259\/SNI_462_2026\/ref-2","doi-asserted-by":"crossref","first-page":"737","DOI":"10.1097\/00007632-199305000-00011","article-title":"Evaluation of intraoperative somatosensory-evoked potential monitoring during 100 cervical operations","volume":"18","author":"Epstein","year":"1993","journal-title":"Spine"},{"key":"10.25259\/SNI_462_2026\/ref-3","doi-asserted-by":"crossref","first-page":"575","DOI":"10.3171\/2011.1.SPINE10649","article-title":"Neurological complications of cervical laminoplasty for patients with ossification of the posterior longitudinal ligament","volume":"14","author":"Fujimori","year":"2011","journal-title":"J Neurosurg Spine"},{"key":"10.25259\/SNI_462_2026\/ref-4","first-page":"e0149462","article-title":"Comparison of anterior decompression and fusion versus laminoplasty in the treatment of multilevel cervical ossification of the posterior longitudinal ligament: A systematic review and meta-analysis","volume":"11","author":"Gu","year":"2016","journal-title":"PLoS One"},{"key":"10.25259\/SNI_462_2026\/ref-5","first-page":"5353","article-title":"Perioperative complications of laminoplasty in degenerative cervical myelopathy","volume":"12","author":"Hirai","year":"2023","journal-title":"J Clin Med"},{"key":"10.25259\/SNI_462_2026\/ref-6","first-page":"784","article-title":"Comparison of laminoplasty and posterior fusion surgery for cervical ossification of posterior longitudinal ligament","volume":"12","author":"Koda","year":"2022","journal-title":"Sci Rep"},{"key":"10.25259\/SNI_462_2026\/ref-7","doi-asserted-by":"crossref","first-page":"1916","DOI":"10.1097\/01.brs.0000228724.01795.a2","article-title":"Characterization of neurophysiologic alerts during anterior cervical spine surgery","volume":"31","author":"Lee","year":"2006","journal-title":"Spine (Phila Pa 1976)"},{"key":"10.25259\/SNI_462_2026\/ref-8","first-page":"1230","article-title":"Reoperation for late neurological deterioration after laminoplasty in individuals with degenerative cervical myelopathy","volume":"20","author":"Lee","year":"2020","journal-title":"Spine J"},{"key":"10.25259\/SNI_462_2026\/ref-9","doi-asserted-by":"crossref","first-page":"E303","DOI":"10.1097\/BRS.0b013e318239cca0","article-title":"Surgical treatment of ossification of the posterior longitudinal ligament and its outcomes: Posterior surgery by laminoplasty","volume":"37","author":"Matsumoto","year":"2012","journal-title":"Spine (Phila Pa 1976)"},{"key":"10.25259\/SNI_462_2026\/ref-10","doi-asserted-by":"crossref","first-page":"1264","DOI":"10.1016\/j.clinph.2014.09.020","article-title":"Role of multimodal intraoperative neurophysiological monitoring during positioning of patient prior to cervical spine surgery","volume":"126","author":"Plata-Bello","year":"2015","journal-title":"Clin Neurophysiol"},{"key":"10.25259\/SNI_462_2026\/ref-11","first-page":"96","article-title":"The utility of somatosensory evoked potential monitoring during cervical spine surgery: How often does it prompt intervention and affect outcome?","volume":"10","author":"Scofield","year":"2010","journal-title":"Ochsner J"}],"container-title":["Surgical Neurology International"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/surgicalneurologyint.com\/early-somatosensory-evoked-potential-monitoring-warnings-during-positioning-for-cervical-laminoplasty-in-ossification-of-the-posterior-longitudinal-ligament-patients\/","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/surgicalneurologyint.com\/surgicalint-articles\/early-somatosensory-evoked-potential-monitoring-warnings-during-positioning-for-cervical-laminoplasty-in-ossification-of-the-posterior-longitudinal-ligament-patients\/","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T09:21:43Z","timestamp":1780651303000},"score":1,"resource":{"primary":{"URL":"http:\/\/surgicalneurologyint.com\/surgicalint-articles\/early-somatosensory-evoked-potential-monitoring-warnings-during-positioning-for-cervical-laminoplasty-in-ossification-of-the-posterior-longitudinal-ligament-patients\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,6,5]]},"references-count":11,"alternative-id":["10.25259\/SNI_462_2026"],"URL":"https:\/\/doi.org\/10.25259\/sni_462_2026","relation":{},"ISSN":["2152-7806","2229-5097"],"issn-type":[{"value":"2152-7806","type":"electronic"},{"value":"2229-5097","type":"print"}],"subject":[],"published":{"date-parts":[[2026,6,5]]},"article-number":"337"}}