Differential control of H-reflex amplitude in different weight-bearing conditions in young and elderly subjects

Tsuruike, Masaaki; Kitano, Koichi; Koceja, David M.; Riley, Zachary A.

doi:10.1016/j.clinph.2012.03.006

Cited by 11 publications

(16 citation statements)

References 28 publications

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“…Both, sheep and horses were standing during the measurements and therefore the limbs were weight bearing while the dogs were positioned in lateral recumbency and any muscle activity was avoided. A silent background EMG was mandatory in all studies to start the stimulation process and any reflex facilitation due to active muscle contraction prior to stimulation could be excluded [27]. Interestingly, when Rossi et al [28] stimulated electrically the sole of the foot of human volunteers at pain threshold intensity in standing position the reflex response decreased with increasing weight on the stimulated limb.…”

Section: Discussionmentioning

confidence: 99%

Quantitative assessment of the nociceptive withdrawal reflex in healthy, non-medicated experimental sheep

Rohrbach

Zeiter

Andersen

et al. 2014

Physiology & Behavior

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20This study aimed to characterize the nociceptive withdrawal reflex (NWR) and to define the 21 nociceptive threshold in 25 healthy, non-medicated experimental sheep in standing posture. 22Electrical stimulation of the dorsal lateral digital nerves of the right thoracic and the pelvic limb 23 was performed and surface-electromyography (EMG) from the deltoid (all animals) and the 24 femoral biceps (18 animals) or the peroneus tertius muscles (7 animals) was recorded. The 25 behavioural reaction following each stimulation was scored on a scale from 0 (no reaction) to 5 26 (strong whole body reaction). A train-of-five 1 ms constant-current pulse was used and current 27 intensity was stepwise increased until NWR threshold intensity was reached. The NWR 28 threshold intensity (I t ) was defined as the minimal stimulus intensity able to evoke a reflex with 29 a minimal Root-Mean-Square amplitude (RMS A ) of 20 µV, a minimal duration of 10 ms and a 30 minimal reaction score of 1 (slight muscle contraction of the stimulated limb) within the time 31 window 20 to 130 ms post-stimulation. Based on this value, further stimulations were 32 performed below (0.9I t ) and above threshold (1.5I t and 2I t ). The stimulus-response curve was 33 described. Data are reported as medians and interquartile ranges. 34At the deltoid muscle I t was 4.4 mA (2.9-5.7) with an RMS A of 62 µV (30-102

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Section: Discussionmentioning

confidence: 99%

Quantitative assessment of the nociceptive withdrawal reflex in healthy, non-medicated experimental sheep

Rohrbach

Zeiter

Andersen

et al. 2014

Physiology & Behavior

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“…However, it is unknown whether the pressure applied on the stimulation electrode influences the evoked potentials and the pain experienced by subjects. This methodological issue was rarely mentioned, suggesting that the investigators did not apply pressure on the stimulation electrode while eliciting the evoked potentials (Oya et al, 2008;Pinar et al, 2010;Tsuruike et al, 2012;Behrens et al, 2015;Mezzarane et al, 2015;Stutzig & Siebert, 2016a,b). In some studies, although pressure on the stimulation electrode was applied using adhesive tape and/or straps (Capaday & Stein, 1986;Duclay & Martin, 2005;Sefton et al, 2007;Querry et al, 2008;Cattagni et al, 2014;Baudry et al, 2015), the physiological rationale behind this manipulation was not specified.…”

Section: Introductionmentioning

confidence: 99%

H‐reflex and M‐wave recordings: effect of pressure application to the stimulation electrode on the assessment of evoked potentials and subject's discomfort

Cattagni

Merlet

Cornu

et al. 2017

Clin Physio Funct Imaging

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This study aimed to compare the effect of different types of pressure applied to the stimulation electrode on assessing the efficiency of Ia-α-motoneuron transmission of the soleus muscle and the associated discomfort using electrical nerve stimulation. Twelve healthy young adults participated in three experimental sessions (one for each knee angle). The amplitudes of the maximal Hoffmann reflex (H ) and motor potential (M ) were recorded from the soleus muscle at 0°, 30° and 90° knee angles (0° full extension) through three pressure applications to the stimulation electrode: no pressure, pressure with manual application and pressure using adhesive tape. The soleus H /M were calculated to assess the efficiency of Ia-α-motoneuron transmission during varied knee angles and pressure application to the stimulation electrode. At the stimulation intensity evoking soleus H and M , subjects were asked to orally provide a value between 'no discomfort' (0) and 'worst possible discomfort' (10). The application of pressure on the stimulation electrode, particularly using adhesive tape, decreased both the stimulation intensity needed to evoke an electrophysiological response and the associated self-reported discomfort (P<0·05), while the H /M remained constant. At the stimulation intensity evoking M , the electrical stimulation appeared to be more painful at 0° knee angle compared with 30° and 90° angles (P<0·01). To conclude, this study showed that a knee flexion and a pressure application to the stimulation electrode, especially using tape pressure, are recommended in the objective to reduce the patient/subjects' discomfort when eliciting evoked potentials on soleus muscle.

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“…Previous work reported an increase in leg muscle activity during upright standing in elderly adults (Laughton et al 2003, Tsuruike et al 2012) that should be supplied by an increased descending drive compared with young adults. However, no study has compared the excitability of the corticospinal pathway projecting to soleus during upright standing between young and elderly adults.…”

mentioning

confidence: 98%

“…, Tsuruike et al . ) that should be supplied by an increased descending drive compared with young adults. However, no study has compared the excitability of the corticospinal pathway projecting to soleus during upright standing between young and elderly adults.…”

mentioning

confidence: 99%

Input–output characteristics of soleus homonymous Ia afferents and corticospinal pathways during upright standing differ between young and elderly adults

2014

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Differential control of H-reflex amplitude in different weight-bearing conditions in young and elderly subjects

Cited by 11 publications

References 28 publications

Quantitative assessment of the nociceptive withdrawal reflex in healthy, non-medicated experimental sheep

Quantitative assessment of the nociceptive withdrawal reflex in healthy, non-medicated experimental sheep

H‐reflex and M‐wave recordings: effect of pressure application to the stimulation electrode on the assessment of evoked potentials and subject's discomfort

Input–output characteristics of soleus homonymous Ia afferents and corticospinal pathways during upright standing differ between young and elderly adults

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