The effect of electrical stimulation on leg muscle pump activity in spinal cord-injured and able-bodied individuals

Autor: W.N.J.C. van Asten, M.T.E. Hopman, M.C.P. van Beekvelt
Rok vydání: 2000
Předmět:
Adult
Male
changes and adaptation [Autonomic dysregulation of the circulation after spinal cord injury]
Supine position
Physiology
Posture
Hemodynamics
Neurological disorder
Physiology (medical)
medicine
Supine Position
Plethysmograph
Humans
Orthopedics and Sports Medicine
De kuitspier-pompfunctie van patiënten met chronisch veneuze insufficiëntie
Muscle
Skeletal
Spinal Cord Injuries
Leg
business.industry
Public Health
Environmental and Occupational Health
General Medicine
Anatomy
medicine.disease
Spinal cord
Electric Stimulation
Plethysmography
medicine.anatomical_structure
Anesthesia
Cuff
The calf muscle pumpfunction of patients with c.v.i
verandering en adaptatie. [Autonome dysregulatie van de circulatie na het ontstaan van een dwarslaesie]
medicine.symptom
business
Paraplegia
Muscle contraction
Muscle Contraction
Zdroj: European Journal of Applied Physiology, 82, pp. 510-516
Scopus-Elsevier
European Journal of Applied Physiology, 82, 510-516
ISSN: 1439-6319
Popis: The purpose of this study was to examine the difference in: (1) effective muscle pump activity (MPA) between voluntary and electrically (ES) induced contractions in able-bodied subjects (ABS); and (2) ES-induced MPA between spinal cord-injured (SCI) individuals and ABS. MPA was measured as relative volume changes in the calf using strain-gauge plethysmography during repeated muscle contractions in the supine position while venous outflow was impeded by a thigh cuff inflated to a range of pressures. Ten SCI individuals and ten ABS participated in this study. ABS showed no significant difference between voluntary and electrically induced MPA [58.1 (18.4)% versus 67.7 (8.7)%, respectively]. SCI individuals showed a significantly lower ES-induced MPA than ABS [21.5 (15.9)% versus 67.7 (8.7)%, respectively]. The low MPA in SCI individuals may be explained by: (1) extensive leg muscle atrophy and/or (2) an “atrophic” vascular system in the legs. The electrical current level seemed to influence MPA (43 mA, 21.5% versus 60 mA, 30.8%) for SCI individuals, whereas no influence of muscle contraction rate on MPA was observed in ABS. The results of this study demonstrate that although ES-induced leg muscle contractions result in adequate MPA in ABS, it leads to significantly less effective MPA in SCI individuals.
Databáze: OpenAIRE
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