Reality monitoring in anosognosia for hemiplegia

P. Jenkinson, N.M.J. Edelstyn, J.L. Drakeford, S.J. Ellis

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


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. Experiment 1 demonstrated that AHP patients exhibit a reality monitoring deficit for non-motor information (i.e., perceived vs. imagined drawings), whilst hemiplegic controls without anosognosia (nonAHP) 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 nonAHP 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.
Original languageEnglish
Pages (from-to)458-470
JournalConsciousness and cognition
Issue number2
Publication statusPublished - 2009


  • anosognosia for hemiplegia
  • reality monitoring
  • forward model
  • source memory


Dive into the research topics of 'Reality monitoring in anosognosia for hemiplegia'. Together they form a unique fingerprint.

Cite this