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Titolo:
Line versus representational bisections in unilateral spatial neglect
Autore:
Ishiai, S; Koyama, Y; Seki, K; Izawa, M;
Indirizzi:
Tokyo Metropolitan Inst Neurosci, Dept Rehabil, Fuchu, Tokyo 1838526, Japan Tokyo Metropolitan Inst Neurosci Fuchu Tokyo Japan 1838526 1838526, Japan Kobe Univ, Sch Med, Fac Hlth Sci, Suma Ku, Kobe, Hyogo 6540142, Japan KobeUniv Kobe Hyogo Japan 6540142 i, Suma Ku, Kobe, Hyogo 6540142, Japan Kakeyu Hosp, Rehabil Ctr, Dept Neurol, Nagano 3860396, Japan Kakeyu Hosp Nagano Japan 3860396 Ctr, Dept Neurol, Nagano 3860396, Japan
Titolo Testata:
JOURNAL OF NEUROLOGY NEUROSURGERY AND PSYCHIATRY
fascicolo: 6, volume: 69, anno: 2000,
pagine: 745 - 750
SICI:
0022-3050(200012)69:6<745:LVRBIU>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEMISPATIAL NEGLECT; DIRECTIONAL HYPOKINESIA; VISUAL NEGLECT; STIMULI; FIELD; HEMIANOPIA; ATTENTION; SEVERITY; HEMINEGLECT; INATTENTION;
Keywords:
unilateral spacial neglect; line bisection; representation; attention;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Ishiai, S Tokyo Metropolitan Inst Neurosci, Dept Rehabil, 2-6 Musashidai, Fuchu, Tokyo 1838526, Japan Tokyo Metropolitan Inst Neurosci 2-6 MusashidaiFuchu Tokyo Japan 1838526
Citazione:
S. Ishiai et al., "Line versus representational bisections in unilateral spatial neglect", J NE NE PSY, 69(6), 2000, pp. 745-750

Abstract

Objectives-To clarify the mechanisms of left unilateral spatial neglect found in the bisection of lines after cueing to the left end point and to determine whether neglect occurs for the mental representation of a line. Methods-A new representational bisection task was developed to eliminate the influence of the right segment of the physical line that would attract attention. Eight patients with typical left unilateral spatial neglect underwent line and representational bisection tasks on a computer display with atouch panel. In the line bisection with cueing, they bisected a line aftertouching the left end point. In the representational bisection, the patients were presented with a line until they touched the left end point. On theblank display, they pointed to the subjective midpoint of the erased line. The performances of the two bisection tasks were compared when the length and position of stimulus lines were varied. Results-The rightward errors in the representational bisection were greater than or equivalent to those in the line bisection with cueing. The effectof line length in which the errors became greater for the longer lines wasequally found in the line bisection with cueing and the representational bisection. This was confirmed in the condition where the right end point wasplaced at a fixed position and the line length was varied. Conclusions-After cueing to the left end point, rightward bisection errorsof patients with neglect are not caused by over-attention to the right segment of the physical line. Left neglect occurs mainly for the mental representation formed at the time of cueing or seeing the whole extent of a line.

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Documento generato il 29/03/20 alle ore 00:16:25