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Selective Attention Gates the Interactive Crossmodal Coupling between Perceptual Systems.

Silvia Convento1, Md Shoaibur Rahman1, Jeffrey M Yau1

  • 1Department of Neuroscience, Baylor College of Medicine, Houston, One Baylor Plaza, Houston, TX 77030, USA.

Current Biology : CB
|February 20, 2018
PubMed
Summary
This summary is machine-generated.

Selective attention modulates brain interactions. Transcranial magnetic stimulation (TMS) over somatosensory cortex (S1) disrupted auditory perception only when attention was divided, revealing attention

Keywords:
TMSaudio-tactileauditionmultisensoryperceptiontouch

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Sensory Perception

Background:

  • Sensory cortical systems often activate in parallel, even with single-modality stimulation.
  • This co-activation may indicate interactive coupling or independent processing.
  • Somatosensory cortex (S1) co-activates with auditory cortex during tactile processing.

Purpose of the Study:

  • To investigate the interactive coupling between human somatosensory and auditory cortical systems.
  • To determine if selective attention modulates these crossmodal interactions.
  • To provide causal evidence for attention-dependent somatosensory-auditory interactions.

Main Methods:

  • Behavioral experiments utilizing transcranial magnetic stimulation (TMS).
  • TMS was applied over somatosensory cortex (S1) and visual cortex.
  • Auditory frequency perception was measured under varying attention states (auditory alone vs. dual auditory-tactile attention).

Main Results:

  • Acute TMS over S1 impaired auditory frequency perception when attention was divided between auditory and tactile stimuli.
  • Auditory perception was unaffected by S1 TMS when attention was directed solely to audition.
  • TMS over visual cortex did not affect auditory frequency perception, confirming somatosensory-auditory specificity.

Conclusions:

  • Selective attention causally modulates functional interactions between somatosensory and auditory cortical systems.
  • The gating of crossmodal coupling by attention is crucial for multisensory integration.
  • These findings highlight attention's role in shaping sensory processing and perception.