Sensory nerve findings by tactile stimulation of median and ulnar nerves in healthy subjects of different ages
| Autor: | Giuseppe Caruso, C. Crisci, Maria Nolano, F. Lullo, R. Massini, Jan Nilsson |
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| Přispěvatelé: | Caruso, G, Nilsson, J, Crisci, C, Nolano, M, Massini, R, Lullo, F |
| Rok vydání: | 1993 |
| Předmět: |
Adult
Male Adolescent Neural Conduction Stimulation Electromyography Vibration Nerve conduction velocity Reference Values Physical Stimulation medicine Reaction Time Humans Age Factor Reference Value Ulnar nerve Evoked Potentials Ulnar Nerve Aged Aged 80 and over medicine.diagnostic_test General Neuroscience Age Factors Anatomy Middle Aged Median nerve Electric Stimulation Median Nerve medicine.anatomical_structure Female Neurology (clinical) Evoked Potential Psychology Orthodromic Human Sensory nerve |
| Zdroj: | Electroencephalography and clinical neurophysiology. 89(6) |
| ISSN: | 0013-4694 |
| Popis: | We studied orthodromic sensory conduction velocity along the distal and proximal segments of the median and ulnar nerves by tactile stimulation of the distal phalanx of the 3rd and 5th digits in 44 healthy subjects divided into 2 age groups: from 16 to 35 years and from 63 to 81 years. In the same nerves, we used selective electrical stimulation of the corresponding digital nerves to obtain sensory potentials. In both groups, responses to tactile stimuli had a longer latency and smaller amplitude than those to electrical stimulation, and they were distributed in a series of 6-7 main deflections, apparently regardless of whether the recording site was distal or proximal. Moreover, irrespective of the nerve and of subject age, conduction velocity along both the digit-wrist and the wrist-elbow nerve segments was significantly slower with tactile stimuli than with electrical stimuli. However, independently of the stimulus used, conduction velocity along the proximal nerve segment was significantly faster than that measured along the digit-wrist nerve segment. In both the median and ulnar nerves, maximum potential amplitude, cumulative area and conduction velocity were significantly reduced in the older age group. This finding could reflect the smaller number of Meissner's corpuscles in older subjects, and the loss of large nerve fibres in individuals over 60. |
| Databáze: | OpenAIRE |
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