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Updated: Jun 30, 2026

Quantitative Assessment of Cortical Auditory-tactile Processing in Children with Disabilities

Quantitative Assessment of Cortical Auditory-tactile Processing in Children with Disabilities

Published on: January 29, 2014

Responses to interaural time delay in human cortex.

Katharina von Kriegstein¹, Timothy D Griffiths, Sarah K Thompson

¹Wellcome Trust Centre for Neuroimaging, Institute of Neurology, London, UK.

Journal of Neurophysiology

|September 19, 2008

Summary

This summary is machine-generated.

Humans locate sounds using interaural time differences (ITDs). Cortical processing of long ITDs is bilateral and shows higher activation, differing from brainstem responses and challenging existing models.

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Area of Science:

Neuroscience
Auditory Perception
Psychoacoustics

Background:

Humans localize sound sources by processing interaural time differences (ITDs).
Existing models, like the weighted-image and pi-limit models, offer contrasting predictions for neural ITD processing.
Previous studies suggested pi-limit model consistency in the inferior colliculus.

Purpose of the Study:

To investigate cortical neural responses to various interaural time differences (ITDs).
To compare experimental findings with predictions from the weighted-image and pi-limit models.
To elucidate the neural mechanisms of ITD coding in the human cortex.

Main Methods:

Neuroimaging techniques were used to measure brain activity.
Participants listened to sounds with varying interaural time differences (ITDs).
Cortical responses were analyzed for patterns of lateralization and activation levels.

Main Results:

Cortical responses to short ITDs aligned with predictions from both weighted-image and pi-limit models.
Contrary to model predictions, long ITDs elicited bilateral cortical activation, despite clear perceived lateralization.
Processing of long ITDs resulted in greater cortical activation compared to short ITDs.

Conclusions:

Cortical coding of ITDs differs significantly from brainstem processing.
Existing models do not fully explain the observed bilateral cortical activation for long ITDs.
Neural representation of sound localization in the cortex is more complex than previously hypothesized.