Somatosensory evoked potentials and sensory impairment in stroke.

Saitoh, Eiichi; Kimura, Akio; Chino, Naoichi; Sawa, Shunji

doi:10.2490/jjrm1963.26.141

Cited by 2 publications

(5 citation statements)

References 14 publications

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“…20,40 SEPs were recorded from the bilateral median and tibial nerves using Neuropack 2300 (Nihon-Kohden, Tokyo, Japan). In accordance with the methods used in previous studies, 23,24 the active electrodes were placed at Cp3 for the median nerve and 2 cm anterior to Cp3 for the tibial nerve. In addition, SEPs were simultaneously recorded from Cp4, 2 cm anterior to Cp4 and Cz.…”

Section: Discussionmentioning

confidence: 99%

“…Values applied for the analysis were calculated as an average of two independent recordings, which were obtained for 500 sweeps via the addition-averaging method. [22][23][24] Analysis of SEP wave forms. To count the number of central SEP peaks, we evaluated NI(N20), PI(P25), NII(N33), PII(P45), and NIII(N60) for the median nerve and N31, P35, N42, P53, and N66 for the tibial nerve.…”

Section: Discussionmentioning

confidence: 99%

“…Values applied for the analysis were calculated as an average of two independent recordings, which were obtained for 500 sweeps via the addition-averaging method. 22–24…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…21,22 In particular, bilateral recording of SEPs allows for minimization of inter and intra-individual variations associated with the state of awareness and cognition. 23,24 However, to the best of our knowledge, there are only a limited number of studies investigating the effect of rehabilitative approaches with SEPs for chronic stroke patients. 17,25 Hybrid assistive neuromuscular dynamic stimulation (HANDS) therapy is a comprehensive neurorehabilitative treatment that utilizes integrated volitional control electrical stimulation (IVES), 26 which is a form of closed-loop electromyography (EMG)-controlled NMES.…”

Section: Introductionmentioning

confidence: 99%

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Neuromuscular electrical stimulation-enhanced rehabilitation is associated with not only motor but also somatosensory cortical plasticity in chronic stroke patients: an interventional study

Tashiro

Mizuno

Kawakami

et al. 2019

Therapeutic Advances in Chronic Disease

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Background:Somatosensory function has been frequently overlooked in clinics and research in the field of chronic stroke. The effects of neurorehabilitation interventions on sensory processing have still to be investigated using electrophysiological means.This study investigated the effect of hybrid assistive neuromuscular dynamic stimulation (HANDS) therapy utilizing closed-loop electromyography-controlled neuromuscular electrical stimulation (NMES), on sensory changes and cortical plasticity among patients with chronic stroke.Methods:This study was a prespecified analysis of 23 participants involved in an ongoing large interventional study. Patients with severe upper limb hemiplegia dues to chronic stroke underwent 3 weeks of inpatient HANDS therapy, where daily treatment consisted of 8 h of NMES combined with wrist splinting, 90 min of comprehensive occupational therapy, and the practice of bimanual activities of daily living. Somatosensory evoked potentials (SEPs) and functional sensory assessments, including the Semmes–Weinstein monofilament test (SWMT) and thumb localizing test (TLT), were compared pre and post-treatment.Results:While no significant recovery of tactile sensation was observed, significant improvements in proprioception and motor function were induced. The number of cortical peaks significantly increased in the median nerve, but not in the tibial nerve. A total of 9 out of 11 participants who initially lacked certain peaks responded to treatment. Further analysis revealed a significant improvement in latency and amplitude of SEP peaks.Conclusions:Our results suggest that NMES-based neurorehabilitation induces certain plastic changes in the primary sensory cortex and in cortices associated with sensorimotor processing in people with chronic stroke sequelae, which may explain the observed improvements in proprioception.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Values applied for the analysis were calculated as an average of two independent recordings, which were obtained for 500 sweeps via the addition-averaging method. 22–24…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Neuromuscular electrical stimulation-enhanced rehabilitation is associated with not only motor but also somatosensory cortical plasticity in chronic stroke patients: an interventional study

Tashiro

Mizuno

Kawakami

et al. 2019

Therapeutic Advances in Chronic Disease

View full text Add to dashboard Cite

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Somatosensory Vertex Potentials: Comparison Between Bilaterally and Unilaterally Evoked Potentials.

et al. 1991

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Abstract.Somatosensory vertex potentials (SVPs), consisting of N1, P1, and N2, are obtained widely on the scalp between 100 and 500 msec of latency. To analyze interactions between SVPs evoked by right and left finger stimulation, the sum of N1-P1 or P1-N2 amplitude values in response to stimulation of independent right and left fingers were compared with those evoked by simultaneous stimulation of both fingers. SVPs were recorded at Cz, C3, and C4 in 12 healthy subjects. Three patterns of finger stimulation, namely, right, left, and both right and left, were randomly chosen until 80 responses had been obtained and averaged for each pattern of stimulation. Simultaneous bilateral responses were larger than either right or left finger SVPs. However, they were consistently smaller than summed SVPs from right and left fingers. These results suggest that the SVP generators be different between right and left. But they may be closely inter-related through occlusive connections. (Keio J Med 40 (4): 235-239, December 1991)

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Somatosensory evoked potentials and sensory impairment in stroke.

Cited by 2 publications

References 14 publications

Neuromuscular electrical stimulation-enhanced rehabilitation is associated with not only motor but also somatosensory cortical plasticity in chronic stroke patients: an interventional study

Neuromuscular electrical stimulation-enhanced rehabilitation is associated with not only motor but also somatosensory cortical plasticity in chronic stroke patients: an interventional study

Somatosensory Vertex Potentials: Comparison Between Bilaterally and Unilaterally Evoked Potentials.

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