scholarly journals Electrocorticographic high gamma activity versus electrical cortical stimulation mapping of naming

Brain ◽  
2005 ◽  
Vol 128 (7) ◽  
pp. 1556-1570 ◽  
Author(s):  
Alon Sinai ◽  
Christopher W. Bowers ◽  
Ciprian M. Crainiceanu ◽  
Dana Boatman ◽  
Barry Gordon ◽  
...  
Keyword(s):  
Cortical Stimulation ◽  
Gamma Activity ◽  
High Gamma ◽  
Cortical Stimulation Mapping

Localization of Expressive Language Cortex in a 2-Year-Old Child Using High-Gamma Electrocorticography

2019 ◽  
Vol 34 (13) ◽  
pp. 837-841
Author(s):  
Abbas Babajani-Feremi ◽  
Stephen P. Fulton ◽  
Christen M. Holder ◽  
Asim F. Choudhri ◽  
Frederick A. Boop ◽  
...  
Keyword(s):  
Expressive Language ◽  
Inferior Frontal Gyrus ◽  
Young Patients ◽  
Cortical Stimulation ◽  
Older Children ◽  
Language Mapping ◽  
Language Deficit ◽  
High Gamma ◽  
Cortical Stimulation Mapping ◽  
Language Cortex

Cortical stimulation mapping is the gold standard for presurgical language mapping; however, it cannot be reliably performed in very young patients. Language mapping using noninvasive modalities is also challenging in very young patients. Although utility of language mapping using power of high-gamma in electrocorticographic recordings was demonstrated in adults and older children, there is a gap of knowledge in the ability of this procedure for localizing language-specific cortex in very young patients. We describe a case of a 2-year-old patient who, to our knowledge, is the youngest person to undergo successful high-gamma electrocorticographic presurgical language mapping for localization of the expressive language cortex (Broca area). The surgical plan was to resect a cortical tuber within the left inferior frontal gyrus and there was a strong concern about postoperative language deficit after resection. Presurgical language mapping using noninvasive modalities were attempted without success. Cortical stimulation mapping was not feasible in this patient. Therefore, high-gamma electrocorticography was the only viable option for language mapping, and it successfully localized the expressive language cortex. The patient underwent surgery for resection of the IFG tuber based on results of high-gamma electrocorticography and had no postoperative language deficit. High-gamma electrocorticography can be used for localizing language-specific cortex, especially Broca’s area, in very young patients.

scholarly journals Variation in the topography of the speech production cortex verified by cortical stimulation and high gamma activity

Neuroreport ◽  
2014 ◽  
Vol 25 (18) ◽  
pp. 1411-1417 ◽  
Author(s):  
Abbas Babajani-Feremi ◽  
Roozbeh Rezaie ◽  
Shalini Narayana ◽  
Asim F. Choudhri ◽  
Stephen P. Fulton ◽  
...  
Keyword(s):  
Speech Production ◽  
Cortical Stimulation ◽  
Gamma Activity ◽  
High Gamma

scholarly journals Dissociation of action and object naming: Evidence from cortical stimulation mapping

2004 ◽  
Vol 24 (1) ◽  
pp. 1-10 ◽  
Author(s):  
David P. Corina ◽  
Erin K. Gibson ◽  
Richard Martin ◽  
Andrew Poliakov ◽  
James Brinkley ◽  
...  
Keyword(s):  
Cortical Stimulation ◽  
Object Naming ◽  
Cortical Stimulation Mapping

scholarly journals Direct electrical stimulation of human cortex evokes high gamma activity that predicts conscious somatosensory perception

2018 ◽  
Vol 15 (2) ◽  
pp. 026015 ◽  
Author(s):  
Leah Muller ◽  
John D Rolston ◽  
Neal P Fox ◽  
Robert Knowlton ◽  
Vikram R Rao ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Gamma Activity ◽  
Direct Electrical Stimulation ◽  
Human Cortex ◽  
High Gamma ◽  
Stimulation Of

scholarly journals Multimodality Word-Finding Distinctions in Cortical Stimulation Mapping

Neurosurgery ◽  
2013 ◽  
Vol 73 (1) ◽  
pp. 36-47 ◽  
Author(s):  
Sandra Serafini ◽  
Merlise Clyde ◽  
Matt Tolson ◽  
Michael M. Haglund
Keyword(s):  
Cortical Stimulation ◽  
Sentence Completion ◽  
Resection Margins ◽  
Dominant Hemisphere ◽  
Language Mapping ◽  
Hierarchical Logistic Regression ◽  
Word Finding ◽  
Cortical Stimulation Mapping ◽  
Multimodality Approach ◽  
Patients With Epilepsy

Abstract BACKGROUND: Cortical stimulation mapping (CSM) commonly uses visual naming to determine resection margins in the dominant hemisphere of patients with epilepsy. Visual naming alone may not identify all language sites in resection-prone areas, prompting additional tasks for comprehensive language mapping. OBJECTIVE: To demonstrate word-finding distinctions between visual, auditory, and reading modalities during CSM and the percentage of modality-specific language sites within dominant hemisphere subregions. METHODS: Twenty-eight patients with epilepsy underwent CSM by the use of visual, auditory, and sentence-completion tasks. Hierarchical logistic regression analyzed errors to identify language sites and provide modality-specific percentages within subregions. RESULTS: The percentage of sites classified as language sites based on auditory naming was twice as high in anterior temporal regions compared with visual naming, marginally higher in posterior temporal areas, and comparable in parietal regions. Sentence completion was comparable to visual and auditory naming in parietal regions and lower in most temporal areas. Of 470 sites tested with both visual and auditory naming, 95 sites were distinctly auditory, whereas 48 sites were distinctly visual. The remaining sites overlapped. CONCLUSION: Distinct cortical areas were found for distinct input modalities, with language sites in anterior tip regions found most often by using auditory naming. The vulnerability of anterior temporal tip regions to resection in this population and distinct sites for each modality suggest that a multimodality approach may be needed to spare crucial language sites, if sparing those sites can be shown to significantly reduce the rate of postoperative language deficits without sacrificing seizure control.

scholarly journals Comparison of subdural and subgaleal recordings of cortical high-gamma activity in humans

2016 ◽  
Vol 127 (1) ◽  
pp. 277-284 ◽  
Author(s):  
Jared D. Olson ◽  
Jeremiah D. Wander ◽  
Lise Johnson ◽  
Devapratim Sarma ◽  
Kurt Weaver ◽  
...  
Keyword(s):  
Gamma Activity ◽  
High Gamma

scholarly journals Prefrontal High Gamma in ECoG tags periodicity of musical rhythms in perception and imagination

2019 ◽  
Author(s):  
S. A. Herff ◽  
C. Herff ◽  
A. J. Milne ◽  
G. D. Johnson ◽  
J. J. Shih ◽  
...  
Keyword(s):  
Auditory Processing ◽  
Right Hemisphere ◽  
Brain Activity ◽  
Activity Patterns ◽  
Superior Temporal Gyrus ◽  
Gamma Activity ◽  
Rhythm Perception ◽  
High Gamma ◽  
The Right ◽  
Musical Rhythms

AbstractRhythmic auditory stimuli are known to elicit matching activity patterns in neural populations. Furthermore, recent research has established the particular importance of high-gamma brain activity in auditory processing by showing its involvement in auditory phrase segmentation and envelope-tracking. Here, we use electrocorticographic (ECoG) recordings from eight human listeners, to see whether periodicities in high-gamma activity track the periodicities in the envelope of musical rhythms during rhythm perception and imagination. Rhythm imagination was elicited by instructing participants to imagine the rhythm to continue during pauses of several repetitions. To identify electrodes whose periodicities in high-gamma activity track the periodicities in the musical rhythms, we compute the correlation between the autocorrelations (ACC) of both the musical rhythms and the neural signals. A condition in which participants listened to white noise was used to establish a baseline. High-gamma autocorrelations in auditory areas in the superior temporal gyrus and in frontal areas on both hemispheres significantly matched the autocorrelation of the musical rhythms. Overall, numerous significant electrodes are observed on the right hemisphere. Of particular interest is a large cluster of electrodes in the right prefrontal cortex that is active during both rhythm perception and imagination. This indicates conscious processing of the rhythms’ structure as opposed to mere auditory phenomena. The ACC approach clearly highlights that high-gamma activity measured from cortical electrodes tracks both attended and imagined rhythms.

Technical and Practical Aspects of Invasive Recordings and Brain Stimulation

2018 ◽  
pp. 26-37
Author(s):  
Gholam K. Motamedi ◽  
Jean Gotman ◽  
Ronald P. Lesser
Keyword(s):  
Charge Density ◽  
Surface Area ◽  
Brain Stimulation ◽  
Electrode Surface ◽  
Cortical Stimulation ◽  
Basic Principles ◽  
Depth Electrodes ◽  
Cortical Stimulation Mapping ◽  
Drug Resistant Epilepsy ◽  
Intracranial Electrodes

This chapter discusses the technical and practical issues involved in invasive recording and cortical stimulation mapping in patients with drug-resistant epilepsy. It reviews the way in which EEG signals are generated, circumstances when intracranial electrodes are needed, and how such electrodes operate. It also discusses the basic principles of cortical stimulation mapping and different methods of using intracranial electrodes for stimulation purposes, and relevant concepts involved in the process such as charge density and electrode surface area. It reviews different electrodes used for mapping including subdural surface electrodes and depth electrodes.

The Comparison of the Anesthetic Regimens for Functional Direct Cortical Stimulation Mapping during Craniotomy

1998 ◽  
Vol 34 (4) ◽  
pp. 821
Author(s):  
Dong Chan Kim ◽  
Seong Hoon Ko ◽  
Sang Kyi Lee ◽  
Jun Rae Lee ◽  
Young Jin Han ◽  
...  
Keyword(s):  
Cortical Stimulation ◽  
Direct Cortical Stimulation ◽  
Cortical Stimulation Mapping
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