Effect of a visual distractor on line bisection

被引：25

作者：

Chieffi, Sergio ^{[1
]}

Iavarone, Alessandro ^{[2
,3
]}

Viggiano, Andrea

Monda, Marcellino ^{[1
]}

Carlomagno, Sergio ^{[4
]}

机构：

[1] Univ Naples 2, Dipartimento Med Sperimentale, I-80138 Naples, Italy

[2] AORN Osped Colli, Unita Operat Complessa Neurol, Osped CTO, Naples, Italy

[3] Univ Napoli Parthenope, Dipartimento Studi Istituz & Sistemi Territoriali, Naples, Italy

[4] Univ Trieste, Dipartimento Psicol, Trieste, Italy

来源：

EXPERIMENTAL BRAIN RESEARCH | 2012年 / 219卷 / 04期

关键词：

Humans; Line bisection; Reaching; Distractor; Perceptual factors; Attentional factors; LEFT-SIDE UNDERESTIMATION; INDIVIDUAL VARIATION; NEGLECT; ATTENTION; CORTEX;

D O I：

10.1007/s00221-012-3106-8

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Previous studies have shown that a flanking distractor produces a spatial bias during line bisection. In the present study, we investigated whether that bias depends on perceptual or motor components. Participants were asked to bisect a horizontal line, or to reach towards a dot, with or without vision of their hand. The line and the target could be flanked by a distractor. Movement trajectories and endpoints were consistently deviated away from the location of the distractor in the bisection task, but not in the reaching task, irrespectively of whether the participants had online visual feedback from their moving hand. It is suggested that flanking distractors influence perceptual localization of the subjective mid-point during line bisection.

引用

页码：489 / 498

页数：10