Linked Life Data

17241747

Source:http://linkedlifedata.com/resource/pubmed/id/17241747

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2007-2-16
pubmed:abstractText
In natural face-to-face communication, speech perception utilizes both auditory and visual information. We described previously an acoustically responsive area on the posterior lateral surface of the superior temporal gyrus (field PLST) that is distinguishable on physiological grounds from other auditory fields located within the superior temporal plane. Considering the empirical findings in humans and non-human primates of cortical locations responsive to heard sounds and/or seen sound-sources, we reasoned that area PLST would also contain neural signals reflecting audiovisual speech interactions. To test this hypothesis, event related potentials (ERPs) were recorded from area PLST using chronically implanted multi-contact subdural surface-recording electrodes in patient-subjects undergoing diagnosis and treatment of medically intractable epilepsy, and cortical ERP maps were acquired during five contrasting auditory, visual and bimodal speech conditions. Stimulus conditions included consonant-vowel (CV) syllable sounds alone, silent seen speech or CV sounds paired with a female face articulating matched or mismatched syllables. Data were analyzed using a MANOVA framework, with the results from planned comparisons used to construct cortical significance maps. Our findings indicate that evoked responses recorded from area PLST to auditory speech stimuli are influenced significantly by the addition of visual images of the moving lower face and lips, either articulating the audible syllable or carrying out a meaningless (gurning) motion. The area of cortex exhibiting this audiovisual influence was demonstrably greater in the speech-dominant hemisphere.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0306-4522
pubmed:author
pubmed:issnType
Print
pubmed:day
2
pubmed:volume
145
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
162-84
pubmed:dateRevised
2011-10-21
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Auditory-visual processing represented in the human superior temporal gyrus.
pubmed:affiliation
Department of Neurosurgery, University of Iowa, Iowa City, IA 52242, USA. rreale@wisc.edu
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural