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Featured researches published by Ken Nakatani.


Journal of Clinical Neuroscience | 2013

Horizontal visual search in a large field by patients with unilateral spatial neglect.

Ken Nakatani; Masako Notoya; Nobuyuki Sunahara; Shusuke Takahashi; Katsumi Inoue

In this study, we investigated the horizontal visual search ability and pattern of horizontal visual search in a large space performed by patients with unilateral spatial neglect (USN). Subjects included nine patients with right hemisphere damage caused by cerebrovascular disease showing left USN, nine patients with right hemisphere damage but no USN, and six healthy individuals with no history of brain damage who were age-matched to the groups with brain right hemisphere damage. The number of visual search tasks accomplished was recorded in the first experiment. Neck rotation angle was continuously measured during the task and quantitative data of the measurements were collected. There was a strong correlation between the number of visual search tasks accomplished and the total Behavioral Inattention Test Conventional Subtest (BITC) score in subjects with right hemisphere damage. In both USN and control groups, the head position during the visual search task showed a balanced bell-shaped distribution from the central point on the field to the left and right sides. Our results indicate that compensatory strategies, including cervical rotation, may improve visual search capability and achieve balance on the neglected side.


World Journal of Neuroscience | 2018

Head Position of Patients with Right Hemisphere Damage during a Visual Search Task in a Large Field

Ken Nakatani; Shusuke Takahashi; Daisuke Kimura; Masako Notoya; Nobuyuki Sunahara; Takashi Fujita; Minoru Toyama; Shinya Fukunaga; Naoe Mori; Kiyoe Sakai; Shinya Fuwa

Spatial neglect syndrome with cerebral lesions is characterized by the ina-bility to orient, report, or respond to relevant visual stimuli contralateral to the lesions. In this study, we investigated the pattern of horizontal visual search in a large space; this search was performed by patients with right hemisphere damage caused by cerebrovascular disease. The neck rotation angle and search time in each increment were continuously recorded during the task, and quantitative data of the measurements were collected. Head position during the visual search task in a large space (%) was then calculated. We set angular bands in increments of 5 degrees from the midline on the left and right sides, and calculated the total search time in each angular band. In patients with unilateral spatial neglect (USN), the search time in the angular band of 5 - 9 on the right side was significantly longer (with USN 16.7%, without USN 4.5%, t = 2.52, df = 16, p < 0.05). Furthermore, in patients with neglect in the leftmost end area in a large space, the search time was significantly shorter in the angular band of 1 - 4 degrees to the left (with neglect 13.1%, without neglect 23.7%, t = 2.13, df = 16, p < 0.05), and tended to be long in the angular band of 5 - 9 to the right. The neck rotation angle and pattern during the search task in a large field deviated slightly to the right, and the search time slightly to the left was short. We believe that these results support the rightward deviation of the search pattern and frame of USN patients.


World Journal of Neuroscience | 2017

Utility of Tracing as a Memory Storage Method

Makana Tsutsui; Masako Notoya; Daisuke Kimura; Ken Nakatani; Takashi Fujita; Nobuyuki Sunahara; Katsumi Inoue


Case Reports in Clinical Medicine | 2018

Differences of Neglect in Peripersonal Space and Extrapersonal Space in a Patient with Unilateral Spatial Neglect

Daisuke Kimura; Ken Nakatani; Masako Notoya; Aiko Imai; Hiroki Bizen; Minoru Toyama; Kazumasa Yamada


金沢大学つるま保健学会誌 | 2017

アルツハイマー病者のIADL に影響する高次脳機能障害についての検討 : 机上IADL 検査を用いて

Takashi Fujita; Masako Notoya; Nobuyuki Sunahara; Ken Nakatani; Kiyohito Kato; Takashi Nagai; Katsumi Inoue


World Journal of Neuroscience | 2017

The Influence of Behavioral and Psychological Symptoms of Dementia on the Autonomic Nervous System

Daisuke Kimura; Ken Nakatani; Masako Notoya; Aiko Imai; Taro Ohtoshi


Higher Brain Function Research | 2014

Left Parietal Lobe Damage Indicating Dysfunction in Language Comprehension of Spatial Relationships:Relevance of Mental Image Manipulation Ability: ―心的空間内のイメージ操作能力との関連―

Etsuko Morioka; Shusuke Takahashi; Ken Nakatani


Higher Brain Function Research | 2012

A Case of Aphemia Accompanied by Denial of Articulatory Disturbance

Ken Nakatani; Masako Notoya; Shusuke Takahashi; Masao Miyazaki; Yutaka Tanaka; Yoshihito Oyama


Higher Brain Function Research | 2010

A Case of Pure Agraphia Caused by Infarction of the Right Central Gyrus Area

Shinya Fukunaga; Fumitada Hattori; Koichi Tagawa; Manabu Fujita; Ken Nakatani


Higher Brain Function Research | 2009

Comparison of articulatory disturbance resulting from subcortical lesion including left putamen, and apraxia of speech

Shusuke Takahashi; Ken Nakatani

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Shusuke Takahashi

American Physical Therapy Association

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Etsuko Morioka

Kansai University of Welfare Sciences

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