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Related Experiment Videos

Two corticotectal areas facilitate multisensory orientation behavior.

Wan Jiang1, Huai Jiang, Barry E Stein

  • 1Department of Neurobiology and Anatomy, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.

Journal of Cognitive Neuroscience
|December 24, 2002
PubMed
Summary

Cortical areas anterior ectosylvian sulcus (AES) and rostral lateral suprasylvian sulcus (rLS) are crucial for multisensory integration in the superior colliculus (SC). Their removal disrupts SC-mediated orientation behaviors to cross-modal stimuli.

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Area of Science:

  • Neuroscience
  • Sensory processing
  • Behavioral neuroscience

Background:

  • The anterior ectosylvian sulcus (AES) and rostral lateral suprasulvian (rLS) cortices influence superior colliculus (SC) neurons' ability to synthesize cross-modal inputs.
  • Understanding the behavioral impact of these cortical influences on SC-mediated responses is essential.

Purpose of the Study:

  • To investigate the effects of eliminating AES and rLS cortical influences on SC-mediated orientation responses to cross-modal stimuli.
  • To determine if multisensory integration disruptions at the neuronal level translate to behavioral deficits.

Main Methods:

  • Cats were trained to orient to visual cues, with or without auditory cues, under varying spatial relationships and stimulus effectiveness.
  • Cryogenic blockade was used to selectively inactivate either the AES or rLS cortical areas.

Related Experiment Videos

  • Orientation response accuracy and error patterns were analyzed.

    • Main Results:

    • Spatially coincident cross-modal cues enhanced correct orientation responses, while disparate cues decreased them.
    • Cryogenic blockade of AES or rLS disrupted these behavioral effects, impairing performance with coincident and disparate cues.
    • These disruptions were specific to multisensory interactions, leaving modality-specific orientation unchanged.

    Conclusions:

    • The findings demonstrate that AES and rLS cortical influences are critical for SC-mediated multisensory orientation behaviors.
    • Disrupting these cortical inputs impairs the synthesis of cross-modal information within the SC, leading to behavioral deficits.
    • This highlights the role of specific cortical pathways in enabling complex multisensory behaviors.