| Intracranial Study of Speech-Elicited Activity on the Human Posterolateral Superior Temporal Gyrus. | |
| | |
MedLine Citation:
|
PMID: 21368087 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
To clarify speech-elicited response patterns within auditory-responsive cortex of the posterolateral superior temporal (PLST) gyrus, time-frequency analyses of event-related band power in the high gamma frequency range (75-175 Hz) were performed on the electrocorticograms recorded from high-density subdural grid electrodes in 8 patients undergoing evaluation for medically intractable epilepsy. Stimuli were 6 stop consonant-vowel (CV) syllables that varied in their consonant place of articulation (POA) and voice onset time (VOT). Initial augmentation was maximal over several centimeters of PLST, lasted about 400 ms, and was often followed by suppression and a local outward expansion of activation. Maximal gamma power overlapped either the Nα or Pβ deflections of the average evoked potential (AEP). Correlations were observed between the relative magnitudes of gamma band responses elicited by unvoiced stop CV syllables (/pa/, /ka/, /ta/) and their corresponding voiced stop CV syllables (/ba/, /ga/, /da/), as well as by the VOT of the stimuli. VOT was also represented in the temporal patterns of the AEP. These findings, obtained in the passive awake state, indicate that PLST discriminates acoustic features associated with POA and VOT and serve as a benchmark upon which task-related speech activity can be compared. |
| | |
Authors:
|
Mitchell Steinschneider; Kirill V Nourski; Hiroto Kawasaki; Hiroyuki Oya; John F Brugge; Matthew A Howard |
Related Documents
:
|
3617537 - Figure-ground segregation modulates apparent motion. 6453937 - Shape, orientation, and apparent rotational motion. 22510707 - Entrainment of peripheral clock genes by cortisol. 22371527 - Assessment of circadian rhythms in humans: comparison of real-time fibroblast reporter ... 20373227 - Judgements of time to contact are affected by rate of appearance of visible texture. 16230897 - Application of frequency importance functions to directivity for prediction of benefit ... |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-3-2 |
Journal Detail:
|
Title: Cerebral cortex (New York, N.Y. : 1991) Volume: - ISSN: 1460-2199 ISO Abbreviation: - Publication Date: 2011 Mar |
Date Detail:
|
Created Date: 2011-3-3 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 9110718 Medline TA: Cereb Cortex Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
|
Department of Neurology. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Disruption of Functional Connectivity of the Default-Mode Network in Alcoholism.
Next Document: Dissociation of Sensitivity to Spatial Frequency in Word and Face Preferential Areas of the Fusiform...