scholarly journals A comparison of customized strategies to manage muscle fatigue in isometric artificially elicited muscle contractions for incomplete SCI subjects

2013 ◽  
Vol 21 (1) ◽  
pp. 19-25 ◽  
Author(s):  
Antonio del-Ama ◽  
Aikaterini Koutsou ◽  
Elisabeth Bravo-Esteban ◽  
Julio Gómez-Soriano ◽  
Stefano Piazza ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Muscle Fatigue ◽  
Management Strategies ◽  
Muscle Performance ◽  
Second Phase ◽  
Objective Criterion ◽  
Fatigue Protocol ◽  
Fatigue Management ◽  
Active Research ◽  
Spinal Cord Injured

Muscle fatigue due to functional electrical stimulation still prevents its widespread use as a gait rehabilitation tool for spinal cord injured subjects. Although there is an active research towards optimization of pulse parameters to delay muscle fatigue, changes in stimulated muscle's performance during repeated contractions due to fatigue have not been yet determined. In this work, a study conducted in two phases with a sample of incomplete spinal cord injured patients is presented. In the first phase, a fatigue protocol based on submaximal isometric contractions allowed to obtain an objective criterion for estimation of fatigue of knee muscles from initial changes in muscle performance. The criterion is incorporated in the fatigue protocol in the second phase of the study, to compare two novel customized fatigue management strategies. Results showed that knee flexor muscles develop less force and lower fatigue than extensor muscles. Muscle fatigue management strategies based on customized modulations of stimulation frequency are valid to delay muscle fatigue.

Knee Muscle Fatigue Estimation during Isometric Artificially Elicited Contractions in Incomplete Spinal Cord Injured Subjects

2013 ◽  
pp. 327-332 ◽  
Author(s):  
Antonio J. del Ama ◽  
Elisabeth Bravo-Esteban ◽  
Juan C. Moreno ◽  
Julio Gómez-Soriano ◽  
Steffano Piazza ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Muscle Fatigue ◽  
Fatigue Estimation ◽  
Knee Muscle ◽  
Spinal Cord Injured

scholarly journals ORTHOPEDIC RELATED COMORBIDITIES IN SPINAL CORD-INJURED INDIVIDUALS

2020 ◽  
Vol 28 (4) ◽  
pp. 199-203
Author(s):  
Rafaella Camilo de Oliveira ◽  
Laura Bellintani de Freitas ◽  
Roberta Rocha Gomes ◽  
Alberto Cliquet Júnior
Keyword(s):  
Spinal Cord ◽  
Chronic Pain ◽  
Upper Limb ◽  
Weight Bearing ◽  
Shoulder Girdle ◽  
Rehabilitation Program ◽  
Muscle Performance ◽  
Level Of Evidence ◽  
Spinal Cord Injured ◽  
Wrist Joints

ABSTRACT Objective: This study aims to review, identify and study the determinations of the main orthopedic aspects in SCI patients. Methods: A total of 80 articles from PUBMED and three theses (MSc. /DSc.) were examined. Results: The results refer to the most essential joints. There is a chronic overload on the shoulder girdle due to the use of the upper limb as a supporting joint. The elbow presents osteoarthritis, subclinical, acute and chronic pain, mainly in quadriplegic patients. In the hand and wrist joints there are cases of paralysis, osteoporosis and osteoarthritis. Hips are the main weight-bearing joints while sitting which leads to a substantial degenerative process of this joint. Lastly, on the knee, feet and ankles, spasticity, contractures, osteoporosis and deformities can arise. Conclusion: Along with the increase in cases and research that analyze the alterations that spinal cord-injured individuals suffer, it is necessary to recognize the orthopedic changes to understand their limits and identify the relevance of the rehabilitation program to improve the muscle performance. Level of Evidence II, Prognostic Studies - Investigating the Effect of a Patient Characteristic on the Outcome of Disease.

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.

How to improve working conditions for spinal cord injured? An intervention study at the workplace

2004 ◽  
Author(s):  
Leif Sandsjo ◽  
Lena Grundell ◽  
Kirsi Valtonen ◽  
Ann-Katrin Karlsson ◽  
Eira Viikari-Juntura
Keyword(s):  
Spinal Cord ◽  
Working Conditions ◽  
Intervention Study ◽  
Improve Working ◽  
Spinal Cord Injured
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