The Effect of Transcutaneous Spinal Cord Stimulation on Standing Postural Control in Healthy Adults

Carrera, Robert M.; Omofuma, Isirame; Yasin, Bushra; Agrawal, Sunil K.

doi:10.1109/lra.2022.3185370

Cited by 7 publications

(15 citation statements)

References 36 publications

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“…All neurophysiological tests were conducted while subjects lay supine. The procedure used for assessing the Hreflex and its recovery cycle was described in Carrera et al (2022). In the experiment described in this paper, we focus on the effects of TSCS on functional task performance.…”

Section: ) Neurophysiological Pretest (Nt1)mentioning

confidence: 99%

“…Muscle acronyms are prefixed with L or R in this paper for the left or right side of the body respectively. EMG data was processed as in Carrera et al (2022) and the integrated EMG (iEMG), and EMG duration (EMG_Dur) were calculated. Muscle coactivation was measured between the TA/SOL, TA/LG, and RF/BF agonist-antagonist pairs.…”

Section: Emg Datamentioning

confidence: 99%

“…Muscle coactivation was measured between the TA/SOL, TA/LG, and RF/BF agonist-antagonist pairs. Coactivation index was defined using the formula defined in Carrera et al (2022).…”

Section: Emg Datamentioning

confidence: 99%

“…In Carrera et al (2022); Lamy et al (2012) it was demonstrated that TSCS increases H-Reflex recovery and also increases the synaptic efficacy of the afferent -motoneuron connection. Therefore, we would have expected a similar increase in recovery in this experiment, but this was not the case.…”

Section: Spinal Excitabilitymentioning

confidence: 99%

“…Inhibitory processes serve to prevent excessive activation of motoneurons by inhibiting the signal from sensory neurons Thayer (2006); Wilson (1966). Previous studies in Carrera et al (2022); Lamy et al (2012) showed increased efficacy of the sensory neuron -motoneuron connection after TSCS. If we assume that this same effect occurred in this experiment, it would mean that subjects experienced increased triggering of the motoneurons.…”

Section: Immediate Effects Of Tscs (Bt1 Vs Bt2)mentioning

confidence: 99%

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Effect of Transcutaneous Spinal Cord Stimulation on Balance and Neurophysiological Characteristics in Young Healthy Adults

Omofuma¹

2023

Preprint

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Section: ) Neurophysiological Pretest (Nt1)mentioning

confidence: 99%

Section: Emg Datamentioning

confidence: 99%

“…Muscle coactivation was measured between the TA/SOL, TA/LG, and RF/BF agonist-antagonist pairs. Coactivation index was defined using the formula defined in Carrera et al (2022).…”

Section: Emg Datamentioning

confidence: 99%

Section: Spinal Excitabilitymentioning

confidence: 99%

Section: Immediate Effects Of Tscs (Bt1 Vs Bt2)mentioning

confidence: 99%

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Effect of Transcutaneous Spinal Cord Stimulation on Balance and Neurophysiological Characteristics in Young Healthy Adults

Omofuma¹

2023

Preprint

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The effect of transcutaneous spinal cord stimulation on the balance and neurophysiological characteristics of young healthy adults

Omofuma,

Carrera,

King-Ori

et al. 2024

Wearable Technol.

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Transcutaneous spinal cord stimulation (TSCS) is gaining popularity as a noninvasive alternative to epidural stimulation. However, there is still much to learn about its effects and utility in assisting recovery of motor control. In this study, we applied TSCS to healthy subjects concurrently performing a functional training task to study its effects during a training intervention. We first carried out neurophysiological tests to characterize the H-reflex, H-reflex recovery, and posterior root muscle reflex thresholds, and then conducted balance tests, first without TSCS and then with TSCS. Balance tests included trunk perturbations in forward, backward, left, and right directions, and subjects’ balance was characterized by their response to force perturbations. A balance training task involved the subjects playing a catch-and-throw game in virtual reality (VR) while receiving trunk perturbations and TSCS. Balance tests with and without TSCS were conducted after the VR training to measure subjects’ post-training balance characteristics and then neurophysiological tests were carried out again. Statistical comparisons using t-tests between the balance and neurophysiological data collected before and after the VR training intervention found that the immediate effect of TSCS was to increase muscle activity during forward perturbations and to reduce balance performance in that direction. Muscle activity decreased after training and even more once TSCS was turned off. We thus observed an interaction of effects where TSCS increased muscle activity while the physical training decreased it.

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Posture of Healthy Subjects Modulated by Transcutaneous Spinal Cord Stimulation

Shamantseva,

Timofeeva,

Gvozdeva

et al. 2023

Preprint

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Transcutaneous electrical stimulation of the spinal cord is used to restore locomotion and body weight support in patients with severe motor disorders. We studied effects of this non-invasive stimulation on postural control in healthy subjects. Stimulation at the L1-L2 vertebrae was performed to activate the extensor muscles of the lower limbs. Because postural regulation depends on the cognitive style, the effects of the stimulation were analyzed separately in field-dependent (FD) and field-independent (FI) participants. During the study young adults (N=16, half FD and half FI participants, all right dominant leg) stood on a force platform in a soundproof chamber with their eyes closed. Stimulation was applied in the midline between the L1-L2 vertebrae or over the left or right dorsal roots of the spinal cord; under control condition there was no stimulation. Stimulation destabilized posture in healthy subjects, whereas patients with movement disorders usually showed an improvement in postural control. In FD participants, left dorsal root and midline stimulation increased several postural parameters by up to 30%. Dorsal root stimulation on the side of the supporting leg reduced postural control, while stimulation on the side of the dominant leg did not. No significant changes were observed in the FI participants.

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The Effect of Transcutaneous Spinal Cord Stimulation on Standing Postural Control in Healthy Adults

Cited by 7 publications

References 36 publications

Effect of Transcutaneous Spinal Cord Stimulation on Balance and Neurophysiological Characteristics in Young Healthy Adults

Effect of Transcutaneous Spinal Cord Stimulation on Balance and Neurophysiological Characteristics in Young Healthy Adults

The effect of transcutaneous spinal cord stimulation on the balance and neurophysiological characteristics of young healthy adults

Posture of Healthy Subjects Modulated by Transcutaneous Spinal Cord Stimulation

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