Electrical Stimulation During Gait Promotes Increase of Muscle Cross-sectional Area in Quadriplegics: A Preliminary Study |
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Authors: | Daniela Cristina Carvalho de Abreu Jr" target="_blank">Alberto CliquetJr Jane Maryan Rondina Fernando Cendes |
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Affiliation: | 1.Biomechanics, Medicine and Rehabilitation of Locomotor System Department, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Av Bandeirantes, 3900 Ribeirão Preto, SP Brazil ;2.Orthopaedics Department, Faculty of Medical Sciences, State University of Campinas, Campinas, Brazil ;3.Neuroimage Laboratory, Faculty of Medical Sciences, State University of Campinas, Campinas, Brazil |
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Abstract: | Increases in muscular cross-sectional area (CSA) occur in quadriplegics after training, but the effects of neuromuscular electrical stimulation (NMES) along with training are unknown. Thus, we addressed two questions: (1) Does NMES during treadmill gait training increase the quadriceps CSA in complete quadriplegics?; and (2) Is treadmill gait training alone enough to observe an increase in CSA? Fifteen quadriplegics were divided into gait (n = 8) and control (n = 7) groups. The gait group performed training with NMES for 6 months twice a week for 20 minutes each time. After 6 months of traditional therapy, the control group received the same gait training protocol but without NMES for an additional 6 months. Axial images of the thigh were acquired at the beginning of the study, at 6 months (for both groups), and at 12 months for the control group to determine the average quadriceps CSA. After 6 months, there was an increase of CSA in the gait group (from 49.8 ± 9.4 cm2 to 57.3 ± 10.3 cm2), but not in the control group (from 43.6 ± 7.6 cm2 to 41.8 ± 8.4 cm2). After another 6 months of gait without NMES in the control group, the CSA did not change (from 41.8 ± 8.4 cm2 to 41.7 ± 7.9 cm2). The increase in quadriceps CSA after gait training in patients with chronic complete quadriplegia appears associated with NMES. |
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