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Related Experiment Video

Updated: Jun 7, 2026

A Comprehensive Protocol for Manual Segmentation of the Medial Temporal Lobe Structures

A Comprehensive Protocol for Manual Segmentation of the Medial Temporal Lobe Structures

Published on: July 2, 2014

Sub-centimeter language organization in the human temporal lobe.

A Flinker¹, E F Chang, N M Barbaro

¹Helen Wills Neuroscience Institute, University of California, Berkeley, CA 94720-3190, USA. adeen.f@gmail.com

Brain and Language

|October 22, 2010

Summary

High-density electrocorticography reveals the human temporal lobe

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Area of Science:

Neuroscience
Cognitive Science
Linguistics

Background:

The human temporal lobe is crucial for language comprehension.
Previous non-invasive studies suggest spatially homogenous activity in speech perception across large cortical areas.
These methods average data, potentially obscuring fine-grained functional organization.

Purpose of the Study:

To investigate the spatiotemporal dynamics of word processing in the human temporal lobe.
To determine the spatial resolution of functional distinctiveness in temporal lobe language processing.
To differentiate responses to word vs. phoneme stimuli and self-produced vs. external speech.

Main Methods:

Utilized electrocorticography (ECoG) with high-density electrode arrays (4mm spacing) placed directly on the temporal lobe.
Recorded electrophysiological signals during word and phoneme processing tasks.
Analyzed responses to both external stimuli and self-produced speech.

Main Results:

ECoG revealed a detailed mosaic of language activity, functionally distinct at 4mm resolution.
Specific word-processing sites were adjacent to sites responding to both words and phonemes.
Distinct sub-regions showed preferential activation for self-produced speech versus external stimuli, with inverse patterns at 4mm separation.

Conclusions:

The temporal lobe exhibits specificity for word processing and self-produced speech.
Cortical processing of language in the temporal lobe is not spatially homogenous over centimeters.
Language processing relies on independent, spatially distinct functional sub-regions at a resolution of at least 4mm.