Development of recommendations for SEMG sensors and sensor placement procedures

Hermens, Hermanus J.; Freriks, Bart; Disselhorst‐Klug, Catherine; Rau, G.

doi:10.1016/s1050-6411(00)00027-4

Cited by 5,642 publications

(3,981 citation statements)

References 7 publications

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“…Electrodes were placed on the center of each muscle belly, in the direction of the muscle fibers, according to European recommendations on sEMG (Hermens, Freriks, Disselhorst‐Klug, & Rau, 2000). …”

Section: Methodsmentioning

confidence: 99%

Botulinum toxin A modifies nociceptive withdrawal reflex in subacute stroke patients

Alvisi

Serrao²,

Conte

et al. 2018

Brain and Behavior

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ObjectivesThe aims of this study were to evaluate the pattern of the nociceptive withdrawal reflex (NWR) of the upper limb at rest and after injection of Botulinum toxin type A (BoNT‐A) in poststroke subacute hemiparetic patients.MethodsFourteen patients with poststroke subacute hemiparesis underwent clinical and instrumental evaluation and BoNT‐A injection. Painful electrical stimulation was applied to induce the NWR. Baseline EMG activity and NWR recordings (EMG and kinematic response) were performed at T0, one month (T1), and three months (T2) after the BoNT‐A injection, as were Modified Ashworth Scale (MAS) and Functional Independence Measure (FIM) scores.ResultsComparison of results at T0, T1, and T2 revealed significant changes in the MAS score for the elbow (p < 0.001) and wrist joints (p < 0.001) and in the FIM score at T0 and T2. BoNT‐A injection had a significant effect on both NWR amplitude and baseline EMG activity in the posterior deltoid (PD) and flexor carpi radialis (FCR) muscles as well as in all averaged muscles. Analysis of elbow kinematics before and after treatment revealed that the reflex probability rates were significantly higher at T1 and T2 than at T0.ConclusionInjection of BoNT‐A in the subacute phase of stroke can modify both the baseline EMG activity and the NWR‐related EMG responses in the upper limb muscles irrespective of the site of injection; furthermore, the reflex‐mediated defensive mechanical responses, that is, shoulder extension and abduction and elbow flexion, increased after treatment. BoNT‐A injection may be a useful treatment in poststroke spasticity with a potential indirect effect on spinal neurons.

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Section: Methodsmentioning

confidence: 99%

Botulinum toxin A modifies nociceptive withdrawal reflex in subacute stroke patients

Alvisi

Serrao²,

Conte

et al. 2018

Brain and Behavior

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“…EMGs were acquired from the 8 major knee muscles from a randomized limb using Wave Wireless (CMR) (Zero Wire, Aurion, Italy) or Telemyo 900 (CHESM) (Noraxon, Arizona, USA) systems sampling (1000 and 2400 Hz, respectively). Similar to our previous studies [16,17,19] that used SENIAM guidelines (http://www.seniam.org/) [21], circular pre-formed bipolar Ag/AgCl electrodes (Duo-Trode, Myotronics, USA) were placed over the medial and lateral gastrocnemii, hamstrings, vasti, as well as the rectus femoris and tensor fasciae latae.…”

Section: Methodsmentioning

confidence: 99%

Tibiofemoral contact forces during walking, running and sidestepping

et al. 2016

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“…1D). (Hermens et al 2000). Signals were amplified (Counterpoint MK2, Dantec, Denmark), band-pass filtered (10-1000 Hz), sampled at 2 kHz, and stored after 12 bits A/D conversion.…”

Section: Force Recordingsmentioning

confidence: 99%

Experimental muscle pain increases normalized variability of multidirectional forces during isometric contractions

Salomoni

Graven‐Nielsen

2012

Eur J Appl Physiol

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Pain elicits complex adaptations of motor strategy, leading to impairments in the generation and control of steady forces, which depend on muscle architecture. The present study used a cross-over design to assess the effects of muscle pain on the stability of multidirectional (task-related and tangential) forces during sustained dorsiflexions, elbow flexions, knee extensions, and plantarflexions. Fifteen healthy subjects performed series of isometric contractions (13 s duration, 2.5%, 20%, 50%, 70% of maximal voluntary force) before, during, and after experimental muscle pain. Three-dimensional force magnitude, angle and variability were measured while the task-related force was provided as feedback to the subjects. Surface electromyography was recorded from agonist and antagonist muscles. Pain was induced in agonist muscles by intramuscular injections of hypertonic (6%) saline with isotonic (0.9%) saline injections as control. The pain intensity was assessed on an electronic visual analogue scale (VAS). Experimental muscle pain elicited larger ranges of force angle during knee extensions and plantarflexions (P<0.03) and higher normalized fluctuations of task-related (P<0.02) and tangential forces (P<0.03) compared with control assessments across force levels, while the mean force magnitudes, mean force angle and the level of muscle activity were non-significantly affected by pain. Increased multidirectional force fluctuations probably resulted from multiple mechanisms that, acting together, balanced the mean surface EMG. Although pain adaptations are believed to aim at the protection of the painful site, the current results show that they result in impairments in steadiness of force.

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Development of recommendations for SEMG sensors and sensor placement procedures

Cited by 5,642 publications

References 7 publications

Botulinum toxin A modifies nociceptive withdrawal reflex in subacute stroke patients

Botulinum toxin A modifies nociceptive withdrawal reflex in subacute stroke patients

Tibiofemoral contact forces during walking, running and sidestepping

Experimental muscle pain increases normalized variability of multidirectional forces during isometric contractions

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