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Sensory and association cortex in time perception.

Domenica Bueti1, Bahador Bahrami, Vincent Walsh

  • 1Institute of Cognitive Neuroscience, University College London, London, UK. d.bueti@ucl.ac.uk

Journal of Cognitive Neuroscience
|January 24, 2008
PubMed
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Disrupting the right posterior parietal cortex impacts auditory and visual timing. The MT/V5 brain area is crucial for visual timing, but not auditory timing, revealing domain-specific roles in time perception.

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psychology

Background:

  • Time perception is a complex cognitive function with poorly understood neural underpinnings.
  • Previous research suggests the parietal cortex plays a role in human time perception.
  • The MT/V5 area, known for motion processing, has not been extensively studied in relation to temporal discrimination.

Purpose of the Study:

  • To investigate the role of human MT/V5 in temporal discrimination.
  • To examine whether disruption of the parietal cortex affects auditory or visual time perception.
  • To determine the specific contributions of different brain regions to sensory modality-dependent timing.

Main Methods:

  • Four experiments were conducted using non-invasive brain stimulation techniques to disrupt activity in specific brain regions.

Related Experiment Videos

  • Transcranial magnetic stimulation (TMS) was used to temporarily interfere with neural activity in the MT/V5 and parietal cortex.
  • Participants performed temporal discrimination tasks involving auditory and visual stimuli.

    • Main Results:

    • Disruption of the right posterior parietal cortex significantly impaired time perception for both auditory and visual stimuli.
    • Disruption of the MT/V5 area selectively impaired temporal discrimination of visual events.
    • MT/V5 disruption did not affect the timing of auditory stimuli, suggesting a visual-specific role.

    Conclusions:

    • The right posterior parietal cortex is a critical hub for timing across both auditory and visual domains.
    • The MT/V5 area is essential for the precise timing of visual information.
    • These findings highlight distinct neural pathways for processing time in different sensory modalities.