scholarly journals Effect of Electrical Stimulation Frequency and Pattern on Muscle Fatigue in Spinal Cord Injured Individuals

2018 ◽  
Vol 32 (S1) ◽  
Author(s):  
Adina E. Draghici ◽  
Shuang Qiu ◽  
Glen Picard ◽  
J. Andrew Taylor
Keyword(s):  
Spinal Cord ◽  
Electrical Stimulation ◽  
Muscle Fatigue ◽  
Stimulation Frequency ◽  
Spinal Cord Injured

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.

The Effect and Mechanism of Intravesical Electrical Stimulation in Spinal Cord Injured Rats

2006 ◽  
Vol 47 (3) ◽  
pp. 303 ◽  
Author(s):  
Hyung Jin Jeon ◽  
Mei Hua Jin ◽  
Hae Kyung Ko ◽  
Chang Hee Hong ◽  
Jang Hwan Kim ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Electrical Stimulation ◽  
Spinal Cord Injured

scholarly journals Effect of electrical stimulation on neural regeneration via the p38-RhoA and ERK1/2-Bcl-2 pathways in spinal cord-injured rats

2018 ◽  
Vol 13 (2) ◽  
pp. 340 ◽  
Author(s):  
MoonYoung Lee ◽  
MinCheol Joo ◽  
ChulHwan Jang ◽  
JongTae Park ◽  
SeungWon Choi ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Electrical Stimulation ◽  
Neural Regeneration ◽  
Spinal Cord Injured

Muscle Fatigue in Response to Electrical Stimulation Pattern and Frequency in Spinal Cord Injury

PM&R ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 699-705
Author(s):  
Shuang Qiu ◽  
Adina E. Draghici ◽  
Glen Picard ◽  
J. Andrew Taylor
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Electrical Stimulation ◽  
Muscle Fatigue ◽  
Cord Injury ◽  
Stimulation Pattern
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