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Patterns of Eye Movements during Cancellation Tasks in Stroke Patients Exhibiting Hemispatial Neglect

Patterns of Eye Movements during Cancellation Tasks in Stroke Patients Exhibiting Hemispatial Neglect
Patterns of Eye Movements during Cancellation Tasks in Stroke Patients Exhibiting Hemispatial Neglect
To investigate whether hemispatial neglect arises due to an information sampling deficit or impaired processing of information on the left we measured eye movements of stroke patients whilst they completed a sub-set of the Behavioural Inattention Test (BIT; Wilson et al., 1987, Behavioural Inattention Test. Suffolk, UK: Thames Valley Test Company) over three sessions. Participants who initially demonstrated left neglect in star and letter cancellation tasks exhibited a marked sampling deficit, with fewer visits made and less total time spent on the far left region of the stimulus. In the later testing sessions, a different pattern of eye movements emerged, with compensatory eye movements being made. The amount of time spent on the left increased and gaze durations were longer in the far left region compared with the other regions. This suggests that, although participants over time could sample information from the neglected region, the acquisition and processing of that information was impaired. Furthermore, behavioural measures (from the letter cancellation task) showed that, despite fixations on the left of the stimulus in the later testing sessions, neglect was still present, indicating a processing deficit. Overall, these results demonstrate neglect can arise due to both information sampling and information processing deficits.
Leyland, Louise-Ann Leyland
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Meadmore, Katie L.
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Godwin, Hayward J.
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Benson, Valerie
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Burridge, Jane H.
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Freeman, Christopher
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Hughes, Ann-Marie
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Rogers, Eric
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Liversedge, Simon P.
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Leyland, Louise-Ann Leyland
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Meadmore, Katie L.
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Godwin, Hayward J.
ee1acd0b-58ee-457f-a49d-20eda38f01f9
Benson, Valerie
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Burridge, Jane H.
c3ae207c-24bf-4f62-a195-4255211a2bfb
Freeman, Christopher
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Hughes, Ann-Marie
11239f51-de47-4445-9a0d-5b82ddc11dea
Rogers, Eric
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Liversedge, Simon P.
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Leyland, Louise-Ann Leyland, Meadmore, Katie L., Godwin, Hayward J., Benson, Valerie, Burridge, Jane H., Freeman, Christopher, Hughes, Ann-Marie, Rogers, Eric and Liversedge, Simon P. (2011) Patterns of Eye Movements during Cancellation Tasks in Stroke Patients Exhibiting Hemispatial Neglect. European Conference on Eye Movements, Marseille, France. (Submitted)

Record type: Conference or Workshop Item (Poster)

Abstract

To investigate whether hemispatial neglect arises due to an information sampling deficit or impaired processing of information on the left we measured eye movements of stroke patients whilst they completed a sub-set of the Behavioural Inattention Test (BIT; Wilson et al., 1987, Behavioural Inattention Test. Suffolk, UK: Thames Valley Test Company) over three sessions. Participants who initially demonstrated left neglect in star and letter cancellation tasks exhibited a marked sampling deficit, with fewer visits made and less total time spent on the far left region of the stimulus. In the later testing sessions, a different pattern of eye movements emerged, with compensatory eye movements being made. The amount of time spent on the left increased and gaze durations were longer in the far left region compared with the other regions. This suggests that, although participants over time could sample information from the neglected region, the acquisition and processing of that information was impaired. Furthermore, behavioural measures (from the letter cancellation task) showed that, despite fixations on the left of the stimulus in the later testing sessions, neglect was still present, indicating a processing deficit. Overall, these results demonstrate neglect can arise due to both information sampling and information processing deficits.

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More information

Submitted date: 2011
Additional Information: Event Dates: August 2011
Venue - Dates: European Conference on Eye Movements, Marseille, France, 2011-08-01
Organisations: EEE, Southampton Wireless Group

Identifiers

Local EPrints ID: 272594
URI: http://eprints.soton.ac.uk/id/eprint/272594
PURE UUID: 6f1746d8-5ec8-47da-829a-8666f8d9de89
ORCID for Katie L. Meadmore: ORCID iD orcid.org/0000-0001-5378-8370
ORCID for Ann-Marie Hughes: ORCID iD orcid.org/0000-0002-3958-8206
ORCID for Eric Rogers: ORCID iD orcid.org/0000-0003-0179-9398

Catalogue record

Date deposited: 25 Jul 2011 16:16
Last modified: 15 Mar 2024 03:25

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Contributors

Author: Louise-Ann Leyland Leyland
Author: Hayward J. Godwin
Author: Valerie Benson
Author: Jane H. Burridge
Author: Christopher Freeman
Author: Eric Rogers ORCID iD
Author: Simon P. Liversedge

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