| Cortical processing of visual and tactile stimuli studied by non-invasive rCBF measurements. | |
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MedLine Citation:
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PMID: 6874439 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Blood flow determinations were made in 32 cortical regions of normal subjects during processing of visual and tactile stimuli. One experiment involved eight subjects who were studied during three conditions of visual stimulation achieved by a Spiral-After-Effect (SAE) apparatus: 1. looking at a stationary spiral, 2. a rotating spiral, and 3. performing the SAE test. Average cortical flow increases during these conditions compared to resting were 5%, 7% and 12% respectively. Local activation was seen in occipital, parietal, temporal, and frontal regions. The magnitude and spread of local flow increases were related to task complexity. In another experiment ten subjects were studied during rest and tactile stimulation of the right hand, left hand, and both. The subjects were instructed either to ignore the stimulation (sensation) or to pay attention to it. Sensation was accompanied by parietal and prefrontal flow increases contralateral to side of stimulation. Attention to the right hand mainly enhanced right hemisphere flow, in the same areas as during sensation. Attention to the left hand was associated with large, diffuse flow increases in both hemispheres. The results support recent proposals of right hemisphere dominance for functions related to attention. |
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Authors:
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J Risberg; I Prohovnik |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Human neurobiology Volume: 2 ISSN: 0721-9075 ISO Abbreviation: Hum Neurobiol Publication Date: 1983 |
Date Detail:
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Created Date: 1983-09-23 Completed Date: 1983-09-23 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8211530 Medline TA: Hum Neurobiol Country: GERMANY, WEST |
Other Details:
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Languages: eng Pagination: 5-10 Citation Subset: IM; S |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Arousal / physiology Attention / physiology Cerebral Cortex / blood supply* Dominance, Cerebral / physiology Figural Aftereffect / physiology Form Perception / physiology Humans Male Motion Perception / physiology Regional Blood Flow Sensory Thresholds Touch / physiology* Visual Perception / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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