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Cited by 267Motor Control and AdaptationSpatial Neglect and Hemispheric DysfunctionAction Observation and Synchronization

Perception of self-generated movement following left parietal lesion

Sirigu, A.·1999·Brain
DOI 10.1093/brain/122.10.1867
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Abstract

Three apraxic patients with lesions in the left parietal cortex were required to execute finger movements with either hand, while the visual feedback they received about the movement was manipulated systematically. We used a device which allowed us to present on a video monitor either the patient's hand or the examiner's hand simultaneously performing an identical or a different movement. In each trial, patients were required to decide whether the hand shown on the screen was their own or not. Hand movements produced in response to verbal command included simple (single-finger extension) and complex gestures (multi-finger extension). Ownership judgements were analysed and compared with those produced by six normal controls and two non-apraxic neurological patients. Apraxic patients and controls accurately recognized their own hand on the screen (own movement condition) and correctly identified the viewed hand as the examiner's when it performed a movement different from their own movement (incongruent movement condition). However, when the viewed hand was the examiner's hand executing their own movement (congruent movement condition), apraxic patients were significantly more impaired than controls. When the results were analysed as a function of gesture type, the number of correct responses was significantly lower for apraxic patients with respect to controls only for complex gestures. Interestingly, when patients executed the finger gestures inaccurately, they still failed to recognize the examiner's hand as alien, and claimed that the correct movement presented on the screen was their own. These results confirm that parietal lesions alter the representational aspects of gestures, and suggest a failure in evaluating and comparing internal and external feedback about movement. We conclude that the parietal cortex plays an important role in generating and maintaining a kinaesthetic model of ongoing movements.

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  • The mismatch between expected and actual consequences of a given action justifies attribution of sensory outcomes to exogenous rather than endogenous causes, such that attribution to exogenous causes results in a reduced or absent sense of agency.

    “The mismatch between the expected and actual consequences of a given action justifies the attribution of sensory outcomes to exogenous (external) rather than endogenous (internal) causes, such that attribution of sensory outcomes to exogenous causes results in a reduced or absent sense of agency (Sirigu et al. 1999).”

    From Consciousness in active inference: Deep self-models, other minds, and the challenge of psychedelic-induced ego-dissolution (2021) · cites this paper as Sirigu et al. 1999

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Authors
Sirigu, A.
Venue
Brain
Publisher
Oxford University Press (OUP)
Published
1999-10-01
Volume
122
Issue
10
Pages
1867-1874
ISSN
  • 0006-8950 (ISSN-L)
  • 1460-2156
DOI
10.1093/brain/122.10.1867
OpenAlex
W2035592217
Cited by
267
References
18
Citations by year
2026: 4 · 2025: 6 · 2024: 6 · 2023: 5 · 2022: 5 · 2021: 12 · 2020: 10 · 2019: 9 · 2018: 8 · 2017: 13 · 2016: 6 · 2015: 8 · 2014: 13 · 2013: 3 · 2012: 12
FWCI
3.34
Type
journal article
Language
en
Open access
closed
Locations
  • Brain (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
  • Cineca Institutional Research Information System (Tor Vergata University) (submittedVersion)
Funders
Centre National de la Recherche Scientifique
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Spatial Neglect and Hemispheric Dysfunction
  • Social Sciences › Psychology › Social Psychology › Action Observation and Synchronization
Keywords
body ownership, self-motion perception, apraxia, left parietal cortex, parietal lobe lesions, visual feedback, finger gestures, motion representation
MeSH terms
Aged, Apraxias, Feedback, Female, Fingers, Gestures, Hand, Hemiplegia, Humans, Kinetics, Male, Middle Aged, Models, Neurological, Motion Perception, Movement, Parietal Lobe, Perception, Visual Perception, Matched-Pair Analysis

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