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Related Experiment Videos

Tactile motion activates the human middle temporal/V5 (MT/V5) complex.

Matthew C Hagen1, Ove Franzén, Francis McGlone

  • 1Cognitive Neuroimaging Unit (11P), Psychiatry Service, Veterans Affairs Medical Center, Minneapolis, MN 55417, USA.

The European Journal of Neuroscience
|October 10, 2002
PubMed
Summary
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Tactile motion activates the human middle temporal/V5 complex (hMT/V5), a brain region typically associated with visual motion. This finding suggests hMT/V5 processes motion information across different sensory modalities.

Area of Science:

  • Neuroscience
  • Sensory Processing
  • Neuroimaging

Background:

  • The human middle temporal/V5 complex (hMT/V5) is crucial for visual motion perception.
  • hMT/V5 has been traditionally viewed as a unimodal visual area.
  • Limited evidence exists for its involvement with other sensory modalities.

Purpose of the Study:

  • To investigate whether tactile motion influences activity in the hMT/V5 region.
  • To determine if the brain region responsible for visual motion perception also processes tactile motion.

Main Methods:

  • Used H215O Positron Emission Tomography (PET) to measure regional cerebral blood flow (rCBF).
  • Compared brain activity during tactile motion (brush stroking) and visual motion (radiating rings) against resting controls.

Related Experiment Videos

  • Defined hMT/V5 location using visual motion activation and analyzed tactile motion effects within this region.

    • Main Results:

    • Significant bilateral activation of hMT/V5 was observed during tactile motion compared to control conditions.
    • In a detailed single-subject analysis, tactile motion-induced rCBF increases overlapped with visually identified hMT/V5.
    • The activated region in tactile motion processing was located at the posterior part of the inferior temporal sulcus.

    Conclusions:

    • The human middle temporal/V5 complex (hMT/V5) is involved in processing tactile motion.
    • These findings challenge the view of hMT/V5 as purely a unimodal visual area.
    • Suggests cross-modal integration of motion information within hMT/V5.