Effects of plantar stimulation on cardiovascular response to orthostatism
| Autor: | Nastassia Navasiolava, L.E. Amirova, Guillemette Gauquelin-Koch, Claude Gharib, Marc-Antoine Custaud, Elena Tomilovskaya, Arnaud Beck, Marie-Pierre Bareille, Inessa B. Kozlovzkaya |
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| Rok vydání: | 2016 |
| Předmět: |
Adult
Male medicine.medical_specialty Sympathetic nervous system Cardiac output Sympathetic Nervous System Physiology Posture Blood Pressure Stimulation Walking 030204 cardiovascular system & hematology Baroreflex 03 medical and health sciences Orthostatic vital signs 0302 clinical medicine Heart Rate Parasympathetic Nervous System Physical Stimulation Physiology (medical) Internal medicine Heart rate medicine Humans Orthopedics and Sports Medicine Cardiac Output Postural Balance Foot business.industry Public Health Environmental and Occupational Health General Medicine Adaptation Physiological Autonomic nervous system Blood pressure medicine.anatomical_structure Touch Physical therapy Cardiology business Mechanoreceptors 030217 neurology & neurosurgery |
| Zdroj: | European Journal of Applied Physiology. 116:2257-2266 |
| ISSN: | 1439-6327 1439-6319 |
| DOI: | 10.1007/s00421-016-3479-7 |
| Popis: | Walking is a complex locomotor process that involves both spinal cord reflexes and cortical integration of peripheral nerve input. Maintaining an upright body position requires not only neuromuscular activity but also cardiovascular regulation. We postulated that plantar mechanical stimulation might modulate autonomic nervous system activity and, thereby, impact blood pressure adaptation during standing. Twelve healthy subjects underwent three randomly ordered 45-min 70°-saddle tilt tests while the plantar surfaces of the feet were stimulated using specially engineered Korvit boots in the following modes: (1) no stimulation, (2) disrupted stimulation, and (3) walking mode. Orthostatic tolerance time was measured for each trial. During testing, we obtained an electrocardiogram and measured blood pressure, skin blood flow, and popliteal vein cross-sectional area. We estimated central hemodynamics, baroreflex sensitivity and heart rate variability. Orthostatic tolerance time was not found to differ significantly between test conditions (37.2 ± 10.4, 40.9 ± 7.6, and 41.8 ± 8.2 min, for no stimulation, disrupted stimulation, and walking mode, respectively). No significant differences between treatment groups were observed for stroke volume or cardiac baroreflex sensitivity, both of which decreased significantly from baseline during tilt testing in all groups. Cardiac sympathetic index and popliteal vein cross-sectional area increased at the end of the tilt period in all groups, without significant differences between treatments. Plantar mechanical stimulation is insufficient for immediate modulation of cardiac sympathetic and parasympathetic activity under orthostatic stress. |
| Databáze: | OpenAIRE |
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