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Related Experiment Video

Updated: Jul 14, 2026

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Methods to Explore the Influence of Top-down Visual Processes on Motor Behavior

Published on: April 16, 2014

Altered processing of sensorimotor feedback in schizophrenia.

Andrés Posada¹, Nicolas Franck, Ségolène Augier

¹Institut des sciences cognitives, 67, bd Pinel, 69675 Bron, France.

Comptes Rendus Biologies

|May 29, 2007

Summary

Schizophrenia patients showed impaired recognition of their own movements due to altered sensory feedback processing. Early differences in visual-event-related potentials (ERPs) suggest a modified self-monitoring system in schizophrenia.

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Area of Science:

Neuroscience
Cognitive Psychology
Psychiatry

Background:

Schizophrenia involves altered reality perception, including hallucinations and delusions.
Theories link schizophrenia to deficiencies in predicting sensory consequences of actions.
Self-monitoring systems process reafferent information from actions for anticipation.

Purpose of the Study:

To investigate visual-event-related potentials (ERPs) during a sensorimotor task in schizophrenia patients.
To examine how experimentally distorted visual feedback affects movement recognition in schizophrenia.
To identify neural processing differences related to action consequences in schizophrenia.

Main Methods:

15 patients with schizophrenia and 15 healthy controls performed a sensorimotor task.
Visual feedback of hand movements was experimentally distorted.
Visual-event-related potentials (ERPs) were recorded and analyzed.

Main Results:

Schizophrenia patients demonstrated significant impairment in recognizing their own movements.
Distinct differences in ERP waveforms were observed between patients and controls.
An early ERP alteration (around 200 ms) was evident in schizophrenia patients.

Conclusions:

Schizophrenia is associated with a deficit in processing the sensory consequences of one's own actions.
Early neural processing of visual action feedback is modified in schizophrenia.
These findings support theories implicating self-monitoring system dysfunction in schizophrenia.