Aging of phrenic nerve conduction in the elderly
| Autor: | Hiroo Yuasa, Hiroyuki Matsumoto, Tomihiro Imai, Yasuo Kato |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Adult
Male Aging medicine.medical_specialty Diaphragm Neural Conduction Action Potentials Phrenic nerve conduction Diaphragmatic breathing Functional Laterality Reference Values Physiology (medical) Statistical analyses Internal medicine Reaction Time medicine Humans Latency (engineering) Phrenic nerve Aged 80 and over Sex Characteristics business.industry Anatomy Middle Aged Sensory Systems Phrenic Nerve Electrophysiology Neurology Cardiology Female Neurology (clinical) Phrenic nerve lesion Linear correlation business |
| Zdroj: | Clinical Neurophysiology. 116:2560-2564 |
| ISSN: | 1388-2457 |
| DOI: | 10.1016/j.clinph.2005.08.003 |
| Popis: | Objective We elucidated the possible relationship between age and conduction parameters of phrenic nerve in subjects above the sixth decade, comparing with the data from middle-age controls. Methods Diaphragmatic action potentials (DAPs) were recorded on bilateral hemithoraces of 41 volunteers aged 60–101 years (old group) and 25 volunteers aged 35–55 years (middle-age group). Statistical analyses were performed to assess the effects of aging on latency, latency corrected by size (Lat/Dist), amplitude, and the right–left difference of these DAP parameters. Results In all 61 subjects, age showed a significant quadratic correlation with latency and with Lat/Dist, and a linear correlation with amplitude. The right–left differences ranged from 0.0 to 14.5% for latency and from 6.5 to 112.4% for amplitude in the elderly. Conclusions The normal ranges of DAP parameters should be determined according to age. The left–right difference may be a useful reference in diagnosing unilateral phrenic nerve lesion. Significance The precise normal ranges of phrenic nerve conduction parameters presented will encourage investigations of neuropathies in subjects aged above 60. |
| Databáze: | OpenAIRE |
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