Visual and tactile size distortion in a patient with right neglect.

Abstract:

:One typical feature of the neglect syndrome in patients with right hemisphere damage is that they bisect horizontal lines to the right of centre. It has been argued that to a large extent these bisection errors can be attributed to a perceptual change whereby the patient experiences the left half of a line as shorter than the right half, causing them to set the midpoint of the line towards the right. We describe here a patient with a left hemisphere lesion and rightward neglect, who consequently makes bisection errors in a leftward direction. We carried out a series of tests which confirmed that he shows a subjective visual distortion in the converse direction, i.e. a perception of horizontal extents on the right as shorter than extents on the left. We also found that he shows a similar distortion in his tactile perception. The association of visual and tactile distortions in this patient is compatible with the view that the distortion effects have a rather high-level origin. Multiple single-case studies will, however, be required to establish whether this association of deficits is typical, or whether visual and tactile size distortions are separable symptoms associated with neglect.

journal_name

Neurocase

journal_title

Neurocase

authors

Pritchard CL,Dijkerman HC,McIntosh RD,Milner AD

doi

10.1076/neur.7.5.391.16246

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

391-6

issue

5

eissn

1355-4794

issn

1465-3656

journal_volume

7

pub_type

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