The Left Superior Longitudinal Fasciculus within the Primary Sensory Area of Inferior Parietal Lobe Plays a Role in Dysgraphia of Kana Omission within Sentences

Nobusada Shinoura; Akira Midorikawa; Toshiyuki Onodera; Ryozi Yamada; Yusuke Tabei; Yasumitsu Onda; Chihiro Itoi; Seiko Saito; Kazuo Yagi

doi:10.3233/BEN-2012-100147

Behavioural Neurology (Jan 2012)

The Left Superior Longitudinal Fasciculus within the Primary Sensory Area of Inferior Parietal Lobe Plays a Role in Dysgraphia of Kana Omission within Sentences

Nobusada Shinoura,
Akira Midorikawa,
Toshiyuki Onodera,
Ryozi Yamada,
Yusuke Tabei,
Yasumitsu Onda,
Chihiro Itoi,
Seiko Saito,
Kazuo Yagi

Affiliations

Nobusada Shinoura: Department of Neurosurgery, Komagome Metropolitan Hospital, Bunkyo-ku, Tokyo, Japan
Akira Midorikawa: Department of Psychology, Chuo University of Literature, Hachioji City, Tokyo, Japan
Toshiyuki Onodera: Department of Radiologic Technology, Tokyo Metropolitan University of Health Sciences, Arakawa-ku, Tokyo, Japan
Ryozi Yamada: Department of Neurosurgery, Komagome Metropolitan Hospital, Bunkyo-ku, Tokyo, Japan
Yusuke Tabei: Department of Neurosurgery, Komagome Metropolitan Hospital, Bunkyo-ku, Tokyo, Japan
Yasumitsu Onda: Department of Neurosurgery, Komagome Metropolitan Hospital, Bunkyo-ku, Tokyo, Japan
Chihiro Itoi: Department of Psychology, Chuo University of Literature, Hachioji City, Tokyo, Japan
Seiko Saito: Department of Psychology, Chuo University of Literature, Hachioji City, Tokyo, Japan
Kazuo Yagi: Department of Radiologic Technology, Tokyo Metropolitan University of Health Sciences, Arakawa-ku, Tokyo, Japan

DOI: https://doi.org/10.3233/BEN-2012-100147
Journal volume & issue: Vol. 25, no. 4
pp. 363 – 368

Abstract

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Functional neurological changes after surgery combined with diffusion tensor imaging (DTI) tractography can directly provide evidence of anatomical localization of brain function. Using these techniques, a patient with dysgraphia before surgery was analyzed at our hospital in 2011. The patient showed omission of kana within sentences before surgery, which improved after surgery. The brain tumor was relatively small and was located within the primary sensory area (S1) of the inferior parietal lobe (IPL). DTI tractography before surgery revealed compression of the branch of the superior longitudinal fasciculus (SLF) by the brain tumor. These results suggest that the left SLF within the S1 of IPL plays a role in the development of dysgraphia of kana omission within sentences.

Published in Behavioural Neurology

ISSN: 0953-4180 (Print); 1875-8584 (Online)
Publisher: Wiley
Country of publisher: United Kingdom
LCC subjects: Medicine: Internal medicine: Neurosciences. Biological psychiatry. Neuropsychiatry
Website: https://onlinelibrary.wiley.com/journal/3037

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