Disruption of spatial memory in visual search in the left visual field in patients with hemispatial neglect

Árni Kristjánsson; Patrik Vuilleumier

doi:10.1016/j.visres.2010.03.001

Disruption of spatial memory in visual search in the left visual field in patients with hemispatial neglect

Árni Kristjánsson^*, Patrik Vuilleumier

^*Corresponding author for this work

Faculty of Psychology

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

Spatial working memory during an ongoing visual search trial was tested in both visual fields for right-brain damaged patients with contralesional spatial neglect, as well as age-matched control patients with right-hemisphere lesions but no neglect. We examined within-trial spatial memory by using a relocation search paradigm introduced by Kristjansson (2000) (modified from Horowitz & Wolfe, 1998), in which the display items traded places every 110. ms so that the target was never to be found in the same location from one moment to the next (the relocation condition), as compared with a static condition where the display items remained in place for the whole trial duration. To equate appearance between the two conditions, all items changed orientation every 110. ms in both conditions, and were masked after each of the briefly presented visual arrays. The results showed that search was disrupted by item relocation for both patients and controls, but importantly this disruption was only seen in the right visual field for the patients, not the left, indicating that their spatial working memory in left visual space is already severely disrupted, and to a greater degree than for their right visual space, in contrast to what has been previously argued.

Original language	English
Pages (from-to)	1426-1435
Number of pages	10
Journal	Vision Research
Volume	50
Issue number	14
DOIs	https://doi.org/10.1016/j.visres.2010.03.001
Publication status	Published - Jun 2010

Bibliographical note

Funding Information:
This research was supported by the Human Frontiers Science Program, an Eliot grant from Harvard University and by the Research fund of the University of Iceland (all awarded to AK) and grants from the Swiss National Science Foundation awarded to PV (No. 3200B0-114014). Jon Driver and Masud Husain are thanked for very helpful discussions, and we are forever grateful to Michele Girardi (deceased) for his help with recruitment and testing of patients. This paper is based in part on the proceedings of the symposium “Visual search and Selective Attention” held in Fribourg, Switzerland, July 16–18th, 2008. We thank Joe Krummenacher for very helpful comments upon previous versions of this manuscript.

Other keywords

Hemispatial neglect
Visual memory
Visual search

Access to Document

10.1016/j.visres.2010.03.001

Cite this

@article{0630ed2919604ac48dd9e5c67f7d240a,

title = "Disruption of spatial memory in visual search in the left visual field in patients with hemispatial neglect",

abstract = "Spatial working memory during an ongoing visual search trial was tested in both visual fields for right-brain damaged patients with contralesional spatial neglect, as well as age-matched control patients with right-hemisphere lesions but no neglect. We examined within-trial spatial memory by using a relocation search paradigm introduced by Kristjansson (2000) (modified from Horowitz & Wolfe, 1998), in which the display items traded places every 110. ms so that the target was never to be found in the same location from one moment to the next (the relocation condition), as compared with a static condition where the display items remained in place for the whole trial duration. To equate appearance between the two conditions, all items changed orientation every 110. ms in both conditions, and were masked after each of the briefly presented visual arrays. The results showed that search was disrupted by item relocation for both patients and controls, but importantly this disruption was only seen in the right visual field for the patients, not the left, indicating that their spatial working memory in left visual space is already severely disrupted, and to a greater degree than for their right visual space, in contrast to what has been previously argued.",

keywords = "Hemispatial neglect, Visual memory, Visual search",

author = "{\'A}rni Kristj{\'a}nsson and Patrik Vuilleumier",

note = "Funding Information: This research was supported by the Human Frontiers Science Program, an Eliot grant from Harvard University and by the Research fund of the University of Iceland (all awarded to AK) and grants from the Swiss National Science Foundation awarded to PV (No. 3200B0-114014). Jon Driver and Masud Husain are thanked for very helpful discussions, and we are forever grateful to Michele Girardi (deceased) for his help with recruitment and testing of patients. This paper is based in part on the proceedings of the symposium “Visual search and Selective Attention” held in Fribourg, Switzerland, July 16–18th, 2008. We thank Joe Krummenacher for very helpful comments upon previous versions of this manuscript.",

year = "2010",

month = jun,

doi = "10.1016/j.visres.2010.03.001",

language = "English",

volume = "50",

pages = "1426--1435",

journal = "Vision Research",

issn = "0042-6989",

publisher = "Elsevier Ltd.",

number = "14",

}

TY - JOUR

T1 - Disruption of spatial memory in visual search in the left visual field in patients with hemispatial neglect

AU - Kristjánsson, Árni

AU - Vuilleumier, Patrik

N1 - Funding Information: This research was supported by the Human Frontiers Science Program, an Eliot grant from Harvard University and by the Research fund of the University of Iceland (all awarded to AK) and grants from the Swiss National Science Foundation awarded to PV (No. 3200B0-114014). Jon Driver and Masud Husain are thanked for very helpful discussions, and we are forever grateful to Michele Girardi (deceased) for his help with recruitment and testing of patients. This paper is based in part on the proceedings of the symposium “Visual search and Selective Attention” held in Fribourg, Switzerland, July 16–18th, 2008. We thank Joe Krummenacher for very helpful comments upon previous versions of this manuscript.

PY - 2010/6

Y1 - 2010/6

N2 - Spatial working memory during an ongoing visual search trial was tested in both visual fields for right-brain damaged patients with contralesional spatial neglect, as well as age-matched control patients with right-hemisphere lesions but no neglect. We examined within-trial spatial memory by using a relocation search paradigm introduced by Kristjansson (2000) (modified from Horowitz & Wolfe, 1998), in which the display items traded places every 110. ms so that the target was never to be found in the same location from one moment to the next (the relocation condition), as compared with a static condition where the display items remained in place for the whole trial duration. To equate appearance between the two conditions, all items changed orientation every 110. ms in both conditions, and were masked after each of the briefly presented visual arrays. The results showed that search was disrupted by item relocation for both patients and controls, but importantly this disruption was only seen in the right visual field for the patients, not the left, indicating that their spatial working memory in left visual space is already severely disrupted, and to a greater degree than for their right visual space, in contrast to what has been previously argued.

AB - Spatial working memory during an ongoing visual search trial was tested in both visual fields for right-brain damaged patients with contralesional spatial neglect, as well as age-matched control patients with right-hemisphere lesions but no neglect. We examined within-trial spatial memory by using a relocation search paradigm introduced by Kristjansson (2000) (modified from Horowitz & Wolfe, 1998), in which the display items traded places every 110. ms so that the target was never to be found in the same location from one moment to the next (the relocation condition), as compared with a static condition where the display items remained in place for the whole trial duration. To equate appearance between the two conditions, all items changed orientation every 110. ms in both conditions, and were masked after each of the briefly presented visual arrays. The results showed that search was disrupted by item relocation for both patients and controls, but importantly this disruption was only seen in the right visual field for the patients, not the left, indicating that their spatial working memory in left visual space is already severely disrupted, and to a greater degree than for their right visual space, in contrast to what has been previously argued.

KW - Hemispatial neglect

KW - Visual memory

KW - Visual search

UR - http://www.scopus.com/inward/record.url?scp=77954762750&partnerID=8YFLogxK

U2 - 10.1016/j.visres.2010.03.001

DO - 10.1016/j.visres.2010.03.001

M3 - Article

C2 - 20211639

AN - SCOPUS:77954762750

SN - 0042-6989

VL - 50

SP - 1426

EP - 1435

JO - Vision Research

JF - Vision Research

IS - 14

ER -

Disruption of spatial memory in visual search in the left visual field in patients with hemispatial neglect

Abstract

Bibliographical note

Other keywords

Access to Document

Fingerprint

Cite this