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Research article summary:
Effects of attention, distraction and sleep on CO(2) laser evoked potentials related to C-fibers in humans.
Abstract Extract: OBJECTIVES: The objective of this study is to evaluate the effects of attention, distraction and sleep on CO(2) laser-evoked potentials (LEP) relating to C-fibers (ultra-late LEP).METHODS: Non-painful CO(2) laser pulses were delivered to a tiny skin area ... (Full abstract text below) Published 2002Oct
in Journal: Clin Neurophysiol
(Language : eng)
Full Pubmed Extract
This information was retrieved, real-time, on your behalf from the public area of the Pubmed website:
1. Clin Neurophysiol.
2002 Oct;113(10):1579-85
Effects of attention, distraction and sleep on CO(2) laser evoked potentials related to C-fibers in humans.
Qiu Y, Inui K, Wang X, Tran TD, Kakigi R
Department of Integrative Physiology, National Institute for Physiological Sciences, Myodaiji, Okazaki, 444-8585, Japan. yhqiu@nips.ac.jp
OBJECTIVES: The objective of this study is to evaluate the effects of attention, distraction and sleep on CO(2) laser-evoked potentials (LEP) relating to C-fibers (ultra-late LEP).METHODS: Non-painful CO(2) laser pulses were delivered to a tiny skin area of the dorsum of the right hand. Ultra-late LEP were recorded from 10 normal subjects in 5 different conditions: control (wakefulness), attention, distraction, drowsiness and sleep (stage 2).RESULTS: The amplitude of ultra-late LEP was slightly increased during attention and significantly decreased during distraction, relative to the control. The ultra-late LEP decreased much in amplitude or almost disappeared during sleep. However, significant differences in latency among the conditions were not found.CONCLUSIONS: We confirmed that the brain responses relating to signals ascending through C-fibers were much affected by the level of consciousness, being consistent with the findings of late LEP relating to Adelta-fibers. This is the first study to indicate the important characteristics of ultra-late LEP relating to consciousness, suggesting that they include cognitive function and also that one has to be careful of the change in alertness when recording.
PMID : 12350434 [PubMed - Indexed for MEDLINE]
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Full Author Information
| First Name | LastName | Initials |
| Yunhai | Qiu | Y |
| Koji | Inui | K |
| Xiaohong | Wang | X |
| Tuan Diep | Tran | TD |
| Ryusuke | Kakigi | R |
Affiliation: Department of Integrative Physiology, National Institute for Physiological Sciences, Myodaiji, Okazaki, 444-8585, Japan. yhqiu@nips.ac.jp
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Category links from this article:- Adult
- Arousal - physiology
- Attention - physiology
- Body Height
- Body Weight
- Carbon Dioxide
- Evoked Potentials - radiation effects
- Female
- Humans
- Lasers
- Male
- Middle Aged
- Reaction Time
- Sleep - radiation effects
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