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Recording Human Electrocorticographic ECoG Signals for Neuroscientific Research and Real-time Functional Cortical Mapping

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Published on: June 26, 2012

Electrocorticographic Activation within Human Auditory Cortex during Dialog-Based Language and Cognitive Testing.

Kirill V Nourski¹, Mitchell Steinschneider², Ariane E Rhone¹

¹Human Brain Research Laboratory, Department of Neurosurgery, The University of Iowa, Iowa City IA, USA.

Frontiers in Human Neuroscience

|May 21, 2016

Summary

This summary is machine-generated.

This study used electrocorticography (ECoG) to examine brain activity during conversation. Researchers found distinct high gamma responses in auditory cortex regions when listening versus speaking, providing insights into human communication.

Keywords:

Heschl’s gyrus Mini-mental state examination high gamma speech superior temporal gyrus

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Transcranial Direct Current Stimulation tDCS of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition

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Transcranial Direct Current Stimulation tDCS of Wernicke's and Broca's Areas in Studies of Language Learning and Word Acquisition

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Published on: July 13, 2019

Area of Science:

Neuroscience
Cognitive Science
Speech Processing

Background:

Cortical speech and language processing involve temporal lobe regions and general cognitive functions.
Understanding interactions between these regions is crucial for human communication.
Early stages of cortical speech processing require clarification of activity patterns.

Purpose of the Study:

To examine high gamma (70-150 Hz) responses in Heschl's gyrus (HG) and superior temporal gyrus (STG) using electrocorticography (ECoG).
To investigate brain activity patterns during an ecologically salient, conversation-based paradigm.
To clarify activity patterns at the earliest stages of cortical speech processing.

Main Methods:

Utilized electrocorticography (ECoG) in neurosurgical epilepsy patients.
Recorded simultaneous ECoG from Heschl's gyrus (HG) and superior temporal gyrus (STG).
Subjects performed an expanded Mini-mental state examination (MMSE) including speech and memory tasks during recordings.

Main Results:

Widespread activation in auditory cortex was observed during the expanded MMSE.
No significant difference in high gamma activity was found between listening and speaking in posteromedial HG (auditory core).
Anterolateral HG and lateral STG showed significantly greater activity during listening compared to speaking.

Conclusions:

Electrocorticography (ECoG) recordings are feasible in time-efficient, dialog-based paradigms for studying language and cognition.
Distinct patterns of high gamma activity differentiate listening from speaking in non-core auditory cortical areas.
These findings provide a foundation for future studies on communication-related brain activity beyond auditory cortex.