{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,8]],"date-time":"2026-04-08T04:00:11Z","timestamp":1775620811528,"version":"3.50.1"},"reference-count":41,"publisher":"Journal of Neurosurgery Publishing Group (JNSPG)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2023,8,1]]},"abstract":"<jats:sec>\n<jats:title>OBJECTIVE<\/jats:title>\n<jats:p>Idiopathic normal pressure hydrocephalus (iNPH) is characterized by ventricular enlargement that deforms the corpus callosum, making the callosal angle (CA) small. The authors aimed to evaluate the clinical usefulness of the CA in different planes in iNPH.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>METHODS<\/jats:title>\n<jats:p>Forty patients with iNPH were included in the study. As a control group, 241 patients with other neurological diseases and 50 healthy controls were included. The subjects had been seen at the authors\u2019 institutions from 2010 to 2020. The Timed Up and Go (TUG) test total time and Mini-Mental State Examination (MMSE) total score were evaluated. CAs were measured in the axial plane at the splenium and genu and in the coronal plane at the anterior commissure and posterior commissure by using 3-dimensional T1-weighted MR images. As other hydrocephalus parameters, the Evans index, frontal-occipital horn ratio, and third ventricular width were also measured in patients with iNPH. Associations between each CA or hydrocephalus parameter and clinical parameters were evaluated. The classification efficacy of each CA in differentiating between iNPH and other neurological diseases and healthy controls was evaluated.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>RESULTS<\/jats:title>\n<jats:p>The CA at the splenium, but no other hydrocephalus parameters, was correlated with TUG total time or MMSE total score in patients with iNPH. Receiver operating characteristic analysis showed that a CA of 71.1\u00b0 at the splenium has 90.0% sensitivity and 89.0% specificity in discriminating iNPH from other neurological diseases and healthy controls. Probabilistic tractography analysis showed that neuronal fibers via the splenium connect the superior parietal lobules, temporal lobes, and occipital lobes.<\/jats:p>\n<\/jats:sec>\n<jats:sec>\n<jats:title>CONCLUSIONS<\/jats:title>\n<jats:p>The study results suggest that interhemispheric disconnections at the splenium are, at least in part, responsible for gait and cognitive disturbance in iNPH. The CA at the splenium is a unique morphological feature that correlates with gait and cognition in iNPH, and it is useful for discriminating iNPH from other neurological diseases and healthy controls.<\/jats:p>\n<\/jats:sec>","DOI":"10.3171\/2022.12.jns221825","type":"journal-article","created":{"date-parts":[[2023,1,20]],"date-time":"2023-01-20T11:29:59Z","timestamp":1674214199000},"page":"481-491","source":"Crossref","is-referenced-by-count":9,"title":["Correlation of callosal angle at the splenium with gait and cognition in normal pressure hydrocephalus"],"prefix":"10.3171","volume":"139","author":[{"given":"Takaaki","family":"Hattori","sequence":"first","affiliation":[{"name":"Departments of Neurology and Neurological Science,"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masahiro","family":"Ohara","sequence":"additional","affiliation":[{"name":"Departments of Neurology and Neurological Science,"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tatsuhiko","family":"Yuasa","sequence":"additional","affiliation":[{"name":"Department of Neurology, Kamagaya General Hospital, Kamagaya, Chiba; and"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Reo","family":"Azuma","sequence":"additional","affiliation":[{"name":"Department of Neurology, Kanto Central Hospital, Setagaya-ku, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qingmeng","family":"Chen","sequence":"additional","affiliation":[{"name":"Departments of Neurology and Neurological Science,"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ryoichi","family":"Hanazawa","sequence":"additional","affiliation":[{"name":"Clinical Biostatistics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Akihiro","family":"Hirakawa","sequence":"additional","affiliation":[{"name":"Clinical Biostatistics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo;"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Satoshi","family":"Orimo","sequence":"additional","affiliation":[{"name":"Department of Neurology, Kanto Central Hospital, Setagaya-ku, Tokyo, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takanori","family":"Yokota","sequence":"additional","affiliation":[{"name":"Departments of Neurology and Neurological Science,"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1754","reference":[{"issue":"3 suppl","key":"b1","series-title":"Neurosurgery","first-page":"S4","article-title":"Diagnosing idiopathic normal-pressure hydrocephalus","volume":"57","author":"Relkin N","year":"2005","unstructured":"Relkin N, Marmarou A, Klinge P, Bergsneider M, Black PM. 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