So near yet so far: neglect in far or near space depends on tool use.
The study of unilateral spatial neglect has shown that space can be dissociated on a peripersonal versus extrapersonal basis. We report a novel type of dissociation based on tool use in a patient suffering from left neglect. Line bisection was carried out in near and far space, using a stick and a laser pointer. A rightward bias was always found for the former, but not for the latter. Neglect thus appears to be contingent not only on distance, but also on the motor action required by the task.
Pegna
A J
AJ
Neurology Clinic, Geneva University Hospitals, Switzerland. alan.pegna@hcuge.ch
Petit
L
L
Caldara-Schnetzer
A S
AS
Khateb
A
A
Annoni
J M
JM
Sztajzel
R
R
Landis
T
T
D000368:Aged; D000369:Aged, 80 and over; D007839:Functional Laterality; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D010468:Perceptual Disorders / Q000503:physiopathology*; D013037:Spatial Behavior / Q000502:physiology*