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Related Concept Videos

Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Association Areas of the Cortex01:21

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at the...

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Related Experiment Video

Updated: May 15, 2026

Recording Human Electrocorticographic (ECoG) Signals for Neuroscientific Research and Real-time Functional Cortical Mapping
13:32

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

Published on: June 26, 2012

Electrocorticographic functional mapping identifies human cortex critical for auditory and visual naming.

Mackenzie Carpenter Cervenka1, James Corines, Dana Frances Boatman-Reich

  • 1Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA. mcerven1@jhmi.edu

Neuroimage
|January 1, 2013
PubMed
Summary

New mapping strategies are crucial for epilepsy surgery patients. Auditory descriptive naming mapping using electrocorticography may reduce post-operative language deficits after dominant temporal or frontal lobe resections.

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Last Updated: May 15, 2026

Recording Human Electrocorticographic (ECoG) Signals for Neuroscientific Research and Real-time Functional Cortical Mapping
13:32

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

Published on: June 26, 2012

Functional Mapping with Simultaneous MEG and EEG
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Functional Mapping with Simultaneous MEG and EEG

Published on: June 14, 2010

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
08:45

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example

Published on: October 24, 2012

Area of Science:

  • Neurosurgery
  • Neuroscience
  • Epileptology

Background:

  • Post-operative language deficits, particularly naming impairments, are common after epilepsy surgery involving dominant frontal or temporal lobe resections.
  • Standard pre-operative electrocortical stimulation mapping for visual object naming may not fully predict these deficits.
  • Electrocorticography (ECoG) high gamma activity mapping offers a more efficient method to identify critical language areas.

Purpose of the Study:

  • To investigate the efficacy of electrocorticographic (ECoG) high gamma activity mapping for both visual object naming and auditory descriptive naming.
  • To determine if auditory descriptive naming mapping can identify language areas missed by standard stimulation mapping within conservative resection boundaries.
  • To assess the potential of ECoG mapping to reduce post-operative language deficits in epilepsy surgery patients.

Main Methods:

  • Simultaneous recording of electrocorticographic high gamma activity (60-150 Hz) and electrocortical stimulation mapping in 16 epilepsy surgery patients.
  • Mapping of visual object naming and auditory descriptive naming using 933 subdural electrodes within dominant temporal or frontal lobe resection areas.
  • Logistic regression analysis to compare ECoG activity during the two naming tasks within resection boundaries.

Main Results:

  • Electrodes within conservative dominant frontal or temporal lobe resection boundaries showed significantly higher high gamma activity during auditory descriptive naming compared to visual object naming.
  • Seven out of eleven patients who underwent resection experienced post-operative language deficits not predicted by stimulation mapping alone.
  • Four patients with deficits had resections that included sites with high gamma activity during naming tasks.

Conclusions:

  • Electrocorticographic mapping of auditory descriptive naming is more sensitive in identifying critical language areas within dominant temporal or frontal lobes than visual object naming.
  • This advanced mapping technique may help neurosurgeons avoid resecting crucial language areas, thereby reducing the risk of permanent post-operative language impairments.
  • Integrating ECoG high gamma mapping for auditory descriptive naming into pre-surgical planning can enhance surgical safety and improve patient outcomes.