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Related Concept Videos

Higher Mental Functions of the Brain: Language01:10

Higher Mental Functions of the Brain: Language

Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...

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Related Experiment Video

Updated: Jun 9, 2026

Combined Invasive Subcortical and Non-invasive Surface Neurophysiological Recordings for the Assessment of Cognitive and Emotional Functions in Humans
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Decoding spoken words using local field potentials recorded from the cortical surface.

Spencer Kellis1, Kai Miller, Kyle Thomson

  • 1Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT 84112, USA.

Journal of Neural Engineering
|September 3, 2010
PubMed
Summary
This summary is machine-generated.

Researchers restored communication for locked-in syndrome patients using brain-computer interfaces. Micro-electrocorticography of language areas decoded speech rhythms, offering new hope for severe paralysis.

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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

Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Neurology

Background:

  • Locked-in syndrome, caused by conditions like amyotrophic lateral sclerosis, results in severe paralysis while maintaining full awareness.
  • Current communication methods for locked-in patients rely on slow, arduous residual movements.
  • Direct brain-computer interfaces (BCIs) offer a potential pathway for restoring intuitive communication.

Purpose of the Study:

  • To investigate the feasibility of using non-penetrating micro-electrodes to record brain activity from language areas.
  • To determine if local field potentials (LFPs) from the cortical surface can be used to classify words for communication.
  • To explore the potential of micro-electrocorticography (micro-ECoG) in BCIs for locked-in patients.

Main Methods:

  • Recorded local field potentials (LFPs) using a grid of closely spaced, non-penetrating micro-electrodes.
  • Targeted surface recordings from the face motor cortex and Wernicke's area of the cerebral cortex.
  • Classified a small set of words based on recorded LFP patterns on a trial-by-trial basis.

Main Results:

  • Successfully classified a small set of words from LFPs recorded from the cortical surface at levels significantly above chance.
  • Observed that distinct electrode patterns correlated with different words, indicating the capture of independent neural signals.
  • Demonstrated that speech-related cortical rhythms can be classified using micro-ECoG signals from language areas.

Conclusions:

  • Cortical surface potentials, specifically micro-ECoG, show promise for developing effective brain-computer interfaces.
  • LFPs from language areas can be utilized to decode speech rhythms, potentially restoring communication for locked-in patients.
  • This approach offers a more intuitive and rapid communication method compared to existing assistive technologies.