Cutaneous nerve activity in response to temperature changes of the cat's skin |
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| Affiliation: | 1. The Australian National University, Fenner School of Environment and Society, Canberra 0200, ACT, Australia;2. CSIRO Land and Water, Ecosciences Precinct, Dutton Park 4102, QLD, Australia;3. The University of Queensland, Centre for Biodiversity and Conservation Science, School of Biological Sciences, Brisbane 4072, QLD, Australia;4. Queensland Herbarium, Department of Science, Information Technology, Innovation and the Arts, Mt. Coot-tha Road, Brisbane 4068, QLD, Australia;5. Imperial College London, Department of Life Sciences, Silwood Park, Ascot SL5 7PY, Berkshire, England, UK;1. Department of Molecular Microbiology, John Innes Centre, Norwich, NR4 7UH, United Kingdom;2. School of Biological Sciences, University of East Anglia, Norwich, NR4 7TU, United Kingdom;1. National Engineering Research Centre for High Efficiency Grinding, Hunan University, Changsha, Hunan, 410082, China;2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha, Hunan, 410082, China;3. College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan, 410082, China;1. Department of Materials Science & Engineering, College of Engineering, Peking University, Beijing 100871, China;2. College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China;3. MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China;4. BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China;5. Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing 100871, China |
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| Abstract: | Cutaneous nerve activity was recorded in response to changes in skin temperature. The presence of activity from the number of receptors which theoretically should be present in the area of skin innervated by the cutaneous nerve could be detected by the method of cross-correlation even if from small myelinated or unmyelinated fibers. No specific response in the small myelinated or unmyelinated afferents was detected in response to skin temperature changes in the range of 15–45 C. Activity recorded from the A, alpha-beta and A, delta-gamma groups in response to mechanical stimulation was not altered by skin temperature ranging from 15 to 45 C. With the temperature below this, the activity in both groups was markedly depressed. Above 45 C, there was some suppression of the A, alpha-beta, but more of the A, delta-gamma groups activity. Above 50 C, irreversible damage to the tissue occurred. Unmyelinated fiber activity in response to mechanical stimuli was increased above and below skin temperature deviating from room temperature. Below 7 C, the response was suppressed. Above 50 C, there is a large amount of C-fiber activity which occurs during the rapid change in skin temperature and this adapts out and C-fiber activity in response to mechanical stimuli is suppressed. The data derived from this study would support the spatial-temporal pattern of cutaneous sensibility as expounded by the “Oxford” group. |
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