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Reality monitoring in anosognosia for hemiplegia

Jenkinson, P. M. and Edelstyn, N.M.J. and DRAKEFORD, Justine and Ellis, S.J. (2009) Reality monitoring in anosognosia for hemiplegia. Consciousness and Cognition, 18 (2). pp. 458-470. ISSN 10538100

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Abstract or description

Anosognosia for hemiplegia (AHP) is a lack of awareness about paralysis following stroke. Recent explanations use a ‘forward model’ of movement to suggest that AHP patients fail to register discrepancies between internally and externally generated sensory information. We predicted that this failure would impair the ability to recall from memory whether information is internally or externally generated (i.e., reality monitor). Two experiments examined this prediction. Experiment1 demonstrated that AHP patients exhibit a reality monitoring deficit for non-motor information (i.e., perceived vs. imagined drawings), whilst hemiplegic controls without anosognosia (non AHP) perform like age-matched healthy volunteers (HVs). Experiment 2 explored if this deficit occurs when AHP patients discriminate performed, imagined, or observed movement. Results showed impaired reality monitoring for movements in AHP and non AHP patients relative to HVs. Findings suggest that reality monitoring processes not directly related to movement, together with a failure to reality monitor movements, contribute to the pathogenesis of AHP.

Item Type: Article
Subjects: C800 Psychology
Faculty: Previous Faculty of Health Sciences > Psychology, Sport and Exercise
Depositing User: Justine DRAKEFORD
Date Deposited: 26 Apr 2013 16:51
Last Modified: 26 Apr 2013 16:51
URI: http://eprints.staffs.ac.uk/id/eprint/910

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