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Article type: Research Article
Authors: Ishihara, Kenji | Ichikawa, Hiroo | Suzuki, Yoshio | Shiota, Jun'ichi | Nakano, Imaharu | Kawamura, Mitsuru
Affiliations: Department of Neurology, Showa University School of Medicine, Tokyo, Japan | Department of Neurology, Ushioda General Hospital, Kanagawa, Japan | Department of Neurology, Jichi Medical School, Tochigi, Japan
Note: [] Corresponding author: Kenji Ishihara, Department of Neurology, Showa University School of Medicine, Hatanodai 1-5-8, Shinagawa-ku, Tokyo 142-8666, Japan. Tel.: +81 3 3784 8781; Fax: +81 3 3784 1936; E-mail: k-ishihara@mvj.biglobe.ne.jp
Abstract: Agraphia, as a neuropsychological symptom of ALS, especially ALS with dementia (ALS-D), has recently attracted more attention. However, the brain lesion responsible has not been identified. Here we present an autopsy case of ALS-D of a patient with obvious agraphia, without aphasia, that also presented cerebrospinal degeneration with TDP-43-pathology compatible with ALS-D. Of the pre-motor frontal lobe cortices, degeneration and immuno-histochemical pathology were most obvious in the caudal area of the left middle frontal gyrus, or Exner's area. Assuring this area plays a pivotal role in the kanji and kana formation used in writing the Japanese language, this case of ALS-D showed both agraphia and Exner's area stressed pathological lesions. It may thus be the first case to indicate an intimate relationship between the neuropsychological symptoms and an associated lesion for ALS-D.
Keywords: Amyotrophic lateral sclerosis with dementia (ALS-D), fronto-temporal lobar degeneration with TDP-43 proteinopathy (FTLD-TDP), progressive agraphia, Exner's area
DOI: 10.3233/BEN-2010-0276
Journal: Behavioural Neurology, vol. 23, no. 3, pp. 153-158, 2010
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