| Temporal gap detection in tactile channels. | |
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MedLine Citation:
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PMID: 14675963 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The ability of observers to detect temporal gaps in bursts of sinusoids or bursts of band-limited noise was measured to assess the temporal acuity of Pacinian (P) and non-Pacinian (NP) tactile information processing channels. The P channel was isolated by delivering high frequency sinusoids or high frequency noise through a large 1.5-cm2 contactor to the thenar eminence. The NP channels were isolated from the P channel by delivering these stimuli as well as stimuli with lower frequencies through a small 0.01-cm2 contactor to the same site. Gap detection thresholds were higher for gaps in noise than for gaps in sinusoids but did not differ among conditions designed to isolate P and NP channels. The finding that temporal acuity does not differ among channels supports the hypothesis that, after termination of a stimulus, the P and NP channels exhibit the same amount of neural persistence. Also consistent with this hypothesis are the earlier findings that the enhancement of the sensation magnitude of a stimulus by a prior stimulus (Verrillo and Gescheider, Percept Psychophys 18: 128-136, 1975) and the duration of sensation after the termination of a stimulus (Gescheider et al., J Acoust Soc Am 91: 1690-1696, 1992) are independent of stimulus frequency. One important implication of this hypothesis, if true, is that the presence of temporal summation in the P channel and its absence in the NP channels, results, not from the lack of neural persistence in the NP channels, but instead, in marked contrast to the P channel, from the lack of a mechanism for integrating persistent neural activity over time. |
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Authors:
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George A Gescheider; Stanley J Bolanowski; Sarah K Chatterton |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Somatosensory & motor research Volume: 20 ISSN: 0899-0220 ISO Abbreviation: Somatosens Mot Res Publication Date: 2003 |
Date Detail:
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Created Date: 2003-12-16 Completed Date: 2004-04-12 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 8904127 Medline TA: Somatosens Mot Res Country: England |
Other Details:
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Languages: eng Pagination: 239-47 Citation Subset: IM |
Affiliation:
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Department of Psychology, Hamilton College, Clinton, NY 13323, USA. ggeschei@hamilton.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Artifacts Female Humans Male Mechanotransduction, Cellular / physiology Pacinian Corpuscles / physiology* Reaction Time / physiology Sensory Thresholds / physiology Touch / physiology* Vibration* |
| Grant Support | |
ID/Acronym/Agency:
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R01NS38661/NS/NINDS NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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