scholarly journals Blood flow and muscle fatigue in SCI individuals during electrical stimulation

2003 ◽  
Vol 94 (2) ◽  
pp. 701-708 ◽  
Author(s):  
Jennifer L. Olive ◽  
Jill M. Slade ◽  
Gary A. Dudley ◽  
Kevin K. McCully
Keyword(s):  
Spinal Cord ◽  
Blood Flow ◽  
Electrical Stimulation ◽  
Muscle Fatigue ◽  
Muscle Blood Flow ◽  
Half Time ◽  
Time To Peak ◽  
Spinal Cord Injured ◽  
Peak Blood ◽  
Stimulation Of

Our purpose was to measure blood flow and muscle fatigue in chronic, complete, spinal cord-injured (SCI) and able-bodied (AB) individuals during electrical stimulation. Electrical stimulation of the quadriceps muscles was used to elicit similar activated muscle mass. Blood flow was measured in the femoral artery by Doppler ultrasound. Muscle fatigue was significantly greater (three- to eightfold, P ≤ 0.001) in the SCI vs. the AB individuals. The magnitude of blood flow was not significantly different between groups. A prolonged half-time to peak blood flow at the beginning of exercise (fivefold, P = 0.001) and recovery of blood flow at the end of exercise (threefold, P = 0.009) was found in the SCI vs. the AB group. In conclusion, the magnitude of the muscle blood flow to electrical stimulation was not associated with increased muscle fatigue in SCI individuals. However, the prolonged time to peak blood flow may be an explanation for increased fatigue in SCI individuals.

Increasing blood flow before exercise in spinal cord-injured individuals does not alter muscle fatigue

2004 ◽  
Vol 96 (2) ◽  
pp. 477-482 ◽  
Author(s):  
Jennifer L. Olive ◽  
Jill M. Slade ◽  
C. Scott Bickel ◽  
Gary A. Dudley ◽  
Kevin K. McCully
Keyword(s):  
Spinal Cord ◽  
Blood Flow ◽  
Electrical Stimulation ◽  
Muscle Fatigue ◽  
Spinal Injury ◽  
Quadriceps Femoris Muscle ◽  
Spinal Cord Injured ◽  
Increased Blood Flow ◽  
Cuff Occlusion ◽  
Femoris Muscle

Previous studies have shown increased fatigue in paralyzed muscle of spinal cord-injured (SCI) patients (Castro M, Apple D Jr, Hillegass E, and Dudley GA. Eur J Appl Physiol 80: 373-378, 1999; Gerrits H, Hopman MTE, Sargeant A, and de Haan A. Clin Physiol 21: 105-113, 2001). Our purpose was to determine whether the increased muscle fatigue could be due to a delayed rise in blood flow at the onset of exercise in SCI individuals. Isometric electrical stimulation was used to induce fatigue in the quadriceps femoris muscle of seven male, chronic (>1 yr postinjury), complete (American Spinal Injury Association, category A) SCI subjects. Cuff occlusion was used to elevate blood flow before electrical stimulation, and the magnitude of fatigue was compared with a control condition of electrical stimulation without prior cuff occlusion. Blood flow was measured in the femoral artery by Doppler ultrasound. Prior cuff occlusion increased blood flow in the first 30 s of stimulation compared with the No-Cuff condition (1,350 vs. 680 ml/min, respectively; P < 0.001), although blood flow at the end of stimulation was the same between conditions (1,260 ± 140 vs. 1,160 ± 370 ml/min, Cuff and No-Cuff condition, respectively; P = 0.511). Muscle fatigue was not significantly different between prior cuff occlusion and the control condition (32 ± 13 vs. 35 ± 10%; P = 0.670). In conclusion, increased muscle fatigue in SCI individuals is not associated with the prolonged time for blood flow to increase at the onset of exercise.

Modulation of Blood Flow in the Skin of Human Legs during Transcutaneus Electrical Stimulation of the Spinal Cord

2020 ◽  
Vol 46 (4) ◽  
pp. 384-390
Author(s):  
G. I. Lobov ◽  
Yu. P. Gerasimenko ◽  
T. R. Moshonkina
Keyword(s):  
Spinal Cord ◽  
Blood Flow ◽  
Electrical Stimulation ◽  
Stimulation Of

Bone fracture during electrical stimulation of the quadriceps in a spinal cord injured subject

1998 ◽  
Vol 79 (9) ◽  
pp. 1133-1136 ◽  
Author(s):  
Andreas Hartkopp ◽  
RenéJ.L. Murphy ◽  
Thomas Mohr ◽  
Michael Kjcer ◽  
Fin Biering-Sorensen
Keyword(s):  
Spinal Cord ◽  
Electrical Stimulation ◽  
Bone Fracture ◽  
Spinal Cord Injured ◽  
Stimulation Of

Increased endothelin and creatine kinase after electrical stimulation of paraplegic muscle

1993 ◽  
Vol 75 (6) ◽  
pp. 2400-2405 ◽  
Author(s):  
R. A. Robergs ◽  
O. Appenzeller ◽  
C. Qualls ◽  
J. Aisenbrey ◽  
J. Krauss ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Creatine Kinase ◽  
Electrical Stimulation ◽  
Venous Blood ◽  
Pressure Control ◽  
Baroreceptor Function ◽  
Cord Injury ◽  
Before And After ◽  
Spinal Cord Injured ◽  
Stimulation Of

The purpose of this study was to assess changes in creatine kinase (CK) and endothelin (ET) in individuals with spinal cord injury (SCI) after computerized functional electrical stimulation leg ergometry (CFES LE). Eight subjects (7 male and 1 female) with complete spinal cord lesions (C7 to L1) completed zero-loaded CFES LE tests at baseline, after 3, 6, and 12 wk of CFES LE training (30 min, 3 times/wk), and also after detraining (DT) (n = 5). Venous blood samples were drawn 24, 48, and 72 h after CFES LE for measurement of ET and CK. The CK response was largest (peak CK) 72 h after baseline tests (28.2 +/- 6.0 to 895.7 +/- 345.9 ktals/l) and was no different from baseline by weeks 3, 6, and 12. After DT, CK was similar before and after CFES LE (153.8 +/- 19.0 and 189.7 +/- 34.5 ktals/l, respectively). CFES LE also significantly increased peak ET after baseline (from 11.7 +/- 1.5 to 18.0 +/- 2.5 pg/ml). During the subsequent training, peak ET remained significantly higher than the baseline value at weeks 3, 6, and 12 (20.2 +/- 1.8, 18.0 +/- 1.1, and 16.9 +/- 2.2 pg/ml, respectively). After DT, peak ET increased significant relationship (r = 0.44) existed between ln peak CK activity and peak ET. In summary, the increase in circulating ET in spinal cord-injured individuals may have implications for baroreceptor function and therefore blood pressure control in SCI. Further research into CFES LE, ET, and baroreceptor function in SCI is warranted.

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