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Related Concept Videos

Association Areas of the Cortex01:21

Association Areas of the Cortex

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Related Experiment Video

Updated: Jun 8, 2026

Analyzing Neural Activity and Connectivity Using Intracranial EEG Data with SPM Software
06:50

Analyzing Neural Activity and Connectivity Using Intracranial EEG Data with SPM Software

Published on: October 30, 2018

Localised face processing by the human prefrontal cortex: stimulation-evoked hallucinations of faces.

J P Vignal, P Chauvel, E Halgren

    Cognitive Neuropsychology
    |October 15, 2010
    PubMed
    Summary

    Electrical stimulation of the right ventrolateral prefrontal cortex (VLPFC) in epilepsy patients induced vivid face hallucinations and illusions. This finding supports the VLPFC's role in face perception and memory.

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    Last Updated: Jun 8, 2026

    Analyzing Neural Activity and Connectivity Using Intracranial EEG Data with SPM Software
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    09:36

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    Published on: May 12, 2014

    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Epilepsy Surgery

    Background:

    • Stereotactic implantation of brain regions including prefrontal, premotor, and anterior temporal sites is used for epilepsy surgical therapy.
    • Understanding the precise roles of specific brain regions in cognitive functions is crucial for refining surgical interventions.

    Purpose of the Study:

    • To investigate the functional role of specific brain regions, particularly the right ventrolateral prefrontal cortex (VLPFC), in face processing.
    • To determine if direct electrical stimulation of frontal and temporal sites can elicit specific perceptual phenomena related to faces.

    Main Methods:

    • Stereotactic electrode implantation in bilateral prefrontal, premotor, and anterior temporal regions for epilepsy treatment.
    • Direct electrical stimulation of targeted brain sites during surgery.
    • Recording of patient subjective experiences (hallucinations, illusions) and electrophysiological responses (afterdischarges).

    Main Results:

    • Electrical stimulation of the right anterior inferior frontal gyrus induced distinct face-related hallucinations and illusions.
    • Stimulation evoked rapid successions of faces on blank backgrounds and modifications of real faces.
    • Effective stimulations were associated with afterdischarges localized to the right VLPFC, with no similar effects from other stimulated sites.

    Conclusions:

    • The right VLPFC plays a significant role in face processing.
    • Findings support models where the VLPFC engages working or declarative memory systems for face representation.
    • This research offers insights into the neural basis of face perception and its potential modulation during neurosurgery.