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Related Experiment Video

Updated: Dec 5, 2025

Testing Sensory and Multisensory Function in Children with Autism Spectrum Disorder
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Time-to-contact perception in the brain.

Robin Baurès1, Marie Fourteau1, Salomé Thébault1

  • 1CerCo, Université de Toulouse, CNRS, UPS, CHU Purpan, Toulouse Cedex 9, France.

Journal of Neuroscience Research
|October 18, 2020
PubMed
Summary
This summary is machine-generated.

Estimating time-to-contact (TTC) involves specific brain regions, particularly the right intraparietal sulcus. This study used brain surgery and tumor analysis to pinpoint these crucial areas for TTC perception.

Keywords:
awake brain surgerybrain mappingdirect electrostimulationperipersonal spacetime-to-contact estimation

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Perception

Background:

  • Time-to-contact (TTC) perception is vital for daily activities.
  • Previous studies identified brain areas correlated with TTC, but causal evidence was lacking.

Purpose of the Study:

  • To identify brain regions causally involved in time-to-contact (TTC) estimation.
  • To investigate the neural basis of TTC perception using patient studies and awake brain surgery.

Main Methods:

  • Study 1: Assessed TTC estimation in 40 patients with brain tumors.
  • Study 2: Employed awake brain surgery with electrostimulation mapping in 15 patients to identify functional areas influencing TTC.
  • Normalized functional area coordinates to MNI space.

Main Results:

  • Tumors in the right upper parietal cortex correlated with impaired TTC estimation.
  • Electrostimulation revealed that the ventral right intraparietal sulcus is critical for early TTC processing.
  • The frontal eye field (middle frontal gyrus) and left hemisphere language areas also influenced TTC estimation.

Conclusions:

  • The ventral right intraparietal sulcus plays a key role in the early stages of time-to-contact (TTC) processing.
  • TTC perception involves a distributed network including frontal eye fields and language areas.
  • These findings highlight a fine-grained cortical representation for TTC processing.