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2011 ; 24
(3
): 257-62
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Drawing with oblique coordinates: on a single case
#MMPMID21876265
Grossi D
; Santangelo G
; Carbone G
; Giordano F
; Angelillo VG
; Trojano L
Behav Neurol
2011[]; 24
(3
): 257-62
PMID21876265
show ga
We describe a patient with right hemisphere damage affected by mild left
visuo-spatial neglect and constructional apraxia. During the rehabilitation, he
failed to draw a draught-board using horizontal and vertical trajectories, but he
performed it successfully using oblique trajectories. These observations
suggested an impairment of vertical/horizontal spatial coordinates system. In
copying tasks including figure elements in different orientations he drew more
accurately components in oblique orientation, whereas failed to reproduce
components in horizontal orientation. The patient performed visuospatial
perceptual and perceptual-imaginative tasks successfully. From these findings, it
is possible to suggest that the oblique coordinate system of reference operates
independently of vertical and horizontal coordinate systems in building a complex
figure and that, therefore, cardinal orientation do not constitute a reference
norm to define oblique orientation, as previously suggested.