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Influence of Colour Lightness Differences in Patients With Left Unilateral Spatial Neglect

Published online by Cambridge University Press:  15 October 2015

Shinsuke Sato ,
Akio Tsubahara ,
Yoichiro Aoyagi ,
Takashi Hiraoka ,
Sumire Hasegawa  and
Masazumi Mizuma
Shinsuke Sato*
Affiliation:
Department of Rehabilitation Medicine, Showa University School of Medicine, Tokyo, Japan. shinne73@hotmail.com
Akio Tsubahara
Affiliation:
Department of Rehabilitation Medicine, Kawasaki Medical School, Kurashiki, Japan.
Yoichiro Aoyagi
Affiliation:
Department of Rehabilitation Medicine, Kawasaki Medical School, Kurashiki, Japan.
Takashi Hiraoka
Affiliation:
Department of Rehabilitation Medicine, Kawasaki Medical School, Kurashiki, Japan.
Sumire Hasegawa
Affiliation:
Department of Rehabilitation Medicine, Okayama Kyokuto hospital, Okayama, Japan.
Masazumi Mizuma
Affiliation:
Department of Rehabilitation Medicine, Showa University School of Medicine, Tokyo, Japan.
*
*Address for correspondence: Shinsuke Sato, MD, Showa University Fujigaoka Hospital, 1-30 Fujigaoka, Aoba-ku, Yokohama city, Kanagawa, 227-8501 Japan
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Abstract

We used desk-based tasks to evaluate and clarify the effects of colour lightness differences (Liebmann effect) in patients with left unilateral spatial neglect (USN) following stroke. Participants were 30 adults with USN (16 men and 14 women; mean age = 72.3 years, SD = 8.9 years). They took the ‘Letter Cancellation Test’ of the Japanese version of the Behavioral Inattention Test using two types of paper: black letters with a yellow background (‘black on yellow’) and red letters with a green background (‘red on green’). They also took the Line Bisection Test and their laterality index (LI) was also determined. Paired t-tests were computed comparing the LI by colour displays. LI was higher for ‘black on yellow’ than for ‘red on green’ in patients with mild left USN. However, LI for ‘red on green’ was higher in patients with severe left USN. Colour lightness differences are likely on the left side in patients with relatively mild left USN, but not in those with severe left USN.

Keywords

hemispatial neglectstrokecolourLiebmann effectlightness
Type
Articles
Information
The Australian Journal of Rehabilitation Counselling , Volume 16 , Issue 1 , 01 May 2010 , pp. 1 - 13
Copyright
Copyright © Cambridge University Press 2010

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