Journal article
Auditory and visual attention assessed with PET
Human brain mapping, Vol.5(6), pp.422-436
1997
DOI: 10.1002/(SICI)1097-0193(1997)5:6<422::AID-HBM3>3.0.CO;2-5
PMID: 20408245
Abstract
Brain mechanisms involved in the maintenance of attention to auditory and visual stimuli at different spatial locations were assessed using positron emission tomography with [15O]water to measure regional cerebral blood flow (rCBF) changes in 13 normal volunteers. Simultaneous auditory [dichotically presented consonant-vowel-consonants (CVCs)] and visual stimuli (vertically oriented, CVCs presented to the left and right of fixation) were presented on every trial. In different conditions subjects attended for targets in a specified stimulus channel (left or right ears or left or right visual fields) while maintaining fixation on a central x. Attending left or right for auditory stimuli increased rCBF in primary auditory cortex in Heschl's gyrus and in temporal lobe auditory association cortices in both hemispheres. Attending left or right for visual stimuli did not change rCBF in primary visual cortex, and only attention to the right significantly increased rCBF in contralateral occipital cortex. Visual attention caused significant rCBF changes in a widespread network that included frontal, parietal, and temporal cortical regions as well as the cerebellum, whereas rCBF changes due to auditory attention were largely localized in the temporal lobes. The results suggest that spatially directed attention is mediated by different mechanisms in the auditory and visual modalities.
Details
- Title: Subtitle
- Auditory and visual attention assessed with PET
- Creators
- D S O'Leary - Mental Health Clinical Research Center, Department of Psychiatry, University of Iowa Hospitals and Clinics, University of Iowa, Iowa City, Iowa 52242-1057, USA. daniel-oleary@uiowa.eduN C AndreasenR R HurtigI J TorresL A FlashmanM L KeslerS V ArndtT J CizadloL L PontoG L WatkinsR D Hichwa
- Resource Type
- Journal article
- Publication Details
- Human brain mapping, Vol.5(6), pp.422-436
- DOI
- 10.1002/(SICI)1097-0193(1997)5:6<422::AID-HBM3>3.0.CO;2-5
- PMID
- 20408245
- NLM abbreviation
- Hum Brain Mapp
- ISSN
- 1065-9471
- eISSN
- 1097-0193
- Publisher
- United States
- Language
- English
- Date published
- 1997
- Academic Unit
- Radiology; Communication Sciences and Disorders; Psychiatry; Research Administration; Iowa Neuroscience Institute; Pharmaceutical Sciences and Experimental Therapeutics; Biostatistics; Physics and Astronomy; Radiation Oncology; Nursing; Injury Prevention Research Center
- Record Identifier
- 9984003925102771
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