Neglect and Motion Stimuli - Insights from a Touchscreen-Based Cancellation Task

Hopfner, Simone; Kesselring, Sonja; Cazzoli, Dario; Gutbrod, Klemens; Laube - Rosenpflanzer, Annett; Chechlacz, Magdalena; Nef, Tobias; Mosimann, Urs Peter; Bohlhalter, Stephan; Müri, René Martin; Nyffeler, Thomas (2015). Neglect and Motion Stimuli - Insights from a Touchscreen-Based Cancellation Task. PLoS ONE, 10(7), e0132025. Public Library of Science 10.1371/journal.pone.0132025

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BACKGROUND AND PURPOSE: In stroke patients, neglect diagnostic is often performed by means of paper-pencil cancellation tasks. These tasks entail static stimuli, and provide no information concerning possible changes in the severity of neglect symptoms when patients are confronted with motion. We therefore aimed to directly contrast the cancellation behaviour of neglect patients under static and dynamic conditions. Since visual field deficits often occur in neglect patients, we analysed whether the integrity of the optic radiation would influence cancellation behaviour. METHODS: Twenty-five patients with left spatial neglect after right-hemispheric stroke were tested with a touchscreen cancellation task, once when the evenly distributed targets were stationary, and once when the identic targets moved with constant speed on a random path. The integrity of the right optic radiation was analysed by means of a hodologic probabilistic approach. RESULTS: Motion influenced the cancellation behaviour of neglect patients, and the direction of this influence (i.e., an increase or decrease of neglect severity) was modulated by the integrity of the right optic radiation. In patients with an intact optic radiation, the severity of neglect significantly decreased in the dynamic condition. Conversely, in patients with damage to the optic radiation, the severity of neglect significantly increased in the dynamic condition. CONCLUSION: Motion may influence neglect in stroke patients. The integrity of the optic radiation may be a predictor of whether motion increases or decreases the severity of neglect symptoms.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > Forschungsbereich Pavillon 52 > Forschungsgruppe Perzeption und Okulomotorik
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology
07 Faculty of Human Sciences > Institute of Education > Educational Psychology
04 Faculty of Medicine > University Psychiatric Services > University Hospital of Geriatric Psychiatry and Psychotherapy
04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > DCR Unit Sahli Building > Forschungsgruppe Neurologie
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Gerontechnology and Rehabilitation

UniBE Contributor:

Hopfner, Simone; Cazzoli, Dario; Gutbrod, Klemens; Nef, Tobias; Mosimann, Urs Peter; Bohlhalter, Stephan; Müri, René Martin and Nyffeler, Thomas

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1932-6203

Publisher:

Public Library of Science

Language:

English

Submitter:

Vanessa Vallejo

Date Deposited:

13 Jul 2015 11:11

Last Modified:

01 Mar 2016 09:50

Publisher DOI:

10.1371/journal.pone.0132025

PubMed ID:

26158619

BORIS DOI:

10.7892/boris.70227

URI:

https://boris.unibe.ch/id/eprint/70227

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