{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,23]],"date-time":"2026-04-23T02:16:12Z","timestamp":1776910572617,"version":"3.51.2"},"reference-count":17,"publisher":"FapUNIFESP (SciELO)","issue":"9","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Arq. Neuro-Psiquiatr."],"published-print":{"date-parts":[[2014,9]]},"abstract":"<jats:p>A retrospective case-control study based on craniometrical evaluation was performed to evaluate the incidence of basilar invagination (BI). Patients with symptomatic tonsillar herniation treated surgically had craniometrical parameters evaluated based on CT scan reconstructions before surgery. BI was diagnosed when the tip of the odontoid trespassed the Chamberlain\u2019s line in three different thresholds found in the literature: 2, 5 or 6.6 mm. In the surgical group (SU), the mean distance of the tip of the odontoid process above the Chamberlain\u2019s line was 12 mm versus 1.2 mm in the control (CO) group (p&lt;0.0001). The number of patients with BI according to the threshold used (2, 5 or 6.6 mm) in the SU group was respectively 19 (95%), 16 (80%) and 15 (75%) and in the CO group it was 15 (37%), 4 (10%) and 2 (5%).<\/jats:p>","DOI":"10.1590\/0004-282x20140113","type":"journal-article","created":{"date-parts":[[2014,9,17]],"date-time":"2014-09-17T14:54:43Z","timestamp":1410965683000},"page":"706-711","source":"Crossref","is-referenced-by-count":17,"title":["Incidence of basilar invagination in patients with tonsillar herniation ? a case control craniometrical study"],"prefix":"10.1590","volume":"72","author":[{"given":"Andrei F","family":"Joaquim","sequence":"first","affiliation":[{"name":"Universidade Estadual de Campinas,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yvens Barbosa","family":"Fernandes","sequence":"additional","affiliation":[{"name":"Universidade Estadual de Campinas,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roger N","family":"Mathias","sequence":"additional","affiliation":[{"name":"Universidade Estadual de Campinas,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ulysses C","family":"Batista","sequence":"additional","affiliation":[{"name":"Universidade Estadual de Campinas,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Enrico","family":"Ghizoni","sequence":"additional","affiliation":[{"name":"Universidade Estadual de Campinas,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Helder","family":"Tedeschi","sequence":"additional","affiliation":[{"name":"Universidade Estadual de Campinas,  Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alpesh A","family":"Patel","sequence":"additional","affiliation":[{"name":"Northwestern University,  USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"530","reference":[{"key":"ref1","first-page":"487","article-title":"Basilar impression (platybasia). 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