Modulation of H Reflex of Pretibial Muscles and Reciprocal Ia Inhibition of Soleus Muscle During Voluntary Teeth Clenching in Humans

2000 ◽  
Vol 83 (4) ◽  
pp. 2063-2070 ◽  
Author(s):  
Yoshiyuki Takada ◽  
Takao Miyahara ◽  
Tatsuya Tanaka ◽  
Takashi Ohyama ◽  
Yoshio Nakamura
Keyword(s):  
Soleus Muscle ◽  
Peroneal Nerve ◽  
Common Peroneal Nerve ◽  
H Reflex ◽  
Electromyographic Activity ◽  
Dependent Manner ◽  
Teeth Clenching ◽  
Ia Inhibition ◽  
The Common ◽  
Stimulation Of

A previous study has demonstrated that the soleus H reflex is facilitated in association with voluntary teeth clenching in proportion with biting force in humans. The present study tried to elucidate the functional significance of this facilitation of the soleus H reflex, by examining 1) whether the facilitation of the H reflex is reciprocal or nonreciprocal between the ankle extensors and flexors and 2) whether the reciprocal Ia inhibition of crural muscles is facilitated or depressed in association with voluntary teeth clenching. The H reflex of the pretibial muscles was evoked by stimulation of the common peroneal nerve in seven healthy subjects with no oral dysfunction. The pretibial H reflex was facilitated in association with voluntary teeth clenching in a force-dependent manner. The facilitation started preceding the onset of electromyographic activity of the masseter muscle. Stimulation of the common peroneal nerve at low intensities subthreshold for evoking the M wave of the pretibial muscles inhibited the soleus H reflex after a short latency corresponding with a disynaptic inhibition, indicating that the reciprocal Ia inhibition was depressed in association with voluntary teeth clenching. Thus, the present study has shown that voluntary teeth clenching evokes a nonreciprocal facilitation of ankle extensor and flexor muscles and attenuated reciprocal Ia inhibition from the pretibial muscles to the soleus muscle. It is concluded that voluntary teeth clenching contributes to improve stability of stance rather than smoothness of movements.

The pulse duration of electrical stimulation influences H-reflexes but not corticospinal excitability for tibialis anterior

2014 ◽  
Vol 92 (10) ◽  
pp. 821-825
Author(s):  
Alyssa R. Hindle ◽  
Jenny W.H. Lou ◽  
David F. Collins
Keyword(s):  
Electrical Stimulation ◽  
Pulse Duration ◽  
Peroneal Nerve ◽  
Motor Evoked Potentials ◽  
Common Peroneal Nerve ◽  
H Reflex ◽  
M Wave ◽  
Recruitment Curve ◽  
Afferent Volley ◽  
The Common

The afferent volley generated by neuromuscular electrical stimulation (NMES) influences corticospinal (CS) excitability and frequent NMES sessions can strengthen CS pathways, resulting in long-term improvements in function. This afferent volley can be altered by manipulating NMES parameters. Presently, we manipulated one such parameter, pulse duration, during NMES over the common peroneal nerve and assessed the influence on H-reflexes and CS excitability. We hypothesized that compared with shorter pulse durations, longer pulses would (i) shift the H-reflex recruitment curve to the left, relative to the M-wave curve; and (ii) increase CS excitability more. Using 3 pulse durations (50, 200, 1000 μs), M-wave and H-reflex recruitment curves were collected and, in separate experiments, CS excitability was assessed by comparing motor evoked potentials elicited before and after 30 min of NMES. Despite finding a leftward shift in the H-reflex recruitment curve when using the 1000 μs pulse duration, consistent with a larger afferent volley for a given efferent volley, the increases in CS excitability were not influenced by pulse duration. Hence, although manipulating pulse duration can alter the relative recruitment of afferents and efferents in the common peroneal nerve, under the present experimental conditions it is ineffective for maximizing CS excitability for rehabilitation.

Microcirculatory changes in venous leg ulcers using intermittent electrostimulation of common peroneal nerve

2021 ◽  
Vol 30 (2) ◽  
pp. 151-155
Author(s):  
Saroj K Das ◽  
Luxmi Dhoonmoon ◽  
Duncan Bain ◽  
Swati Chhabra
Keyword(s):  
Peroneal Nerve ◽  
Common Peroneal Nerve ◽  
Mechanistic Explanation ◽  
Laser Speckle ◽  
Leg Ulcers ◽  
Contrast Imaging ◽  
Venous Leg Ulcers ◽  
The Common ◽  
Neuromuscular Electrostimulation ◽  
Stimulation Of

Objective: Activation of the venous muscle pumps of the leg by intermittent transdermal neuromuscular stimulation of the common peroneal nerve has been previously shown to augment venous and arterial flow in patients with leg ulcers. This study aims to establish if microcirculation in the wound bed and periwound area are augmented by the activation of a neuromuscular electrostimulation device (NMES) (Geko, Firstkind Ltd., UK). Method: In this self-controlled, observational study, laser speckle contrast imaging was used to map and quantify microcirculatory flow in the wound bed and periwound area of patients with venous leg ulcers (VLU). Values of flow and pulsatility in these locations were compared with the NMES device, both active and inactive. Results: A total of 16 patients took part in the study. Microvascular flux increased by 27% (p=0.014) in the wound bed, and by 34% (p=0.004) in the periwound area, when the NMES device was activated. Pulsatility increased by 170% (p<0.001) in the wound bed and 173% (p<0.001) in the periwound area when the device was activated. Conclusion: Intermittent electrostimulation of the common peroneal nerve substantially increased both microcirculatory flux and pulsatility in the wound bed and in the periwound area of the VLUs of patients in this study. This provides a plausible mechanistic explanation for its reported efficacy in healing VLUs.

60. Changes in motor cortical excitability following electrical stimulation of the common peroneal nerve

2010 ◽  
Vol 121 (7) ◽  
pp. e33
Author(s):  
Mutsumi Sugaya ◽  
Mitsuhiko Kodama ◽  
Koji Aono ◽  
Hiroshi Tanaka ◽  
Takashi Kasahara ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Peroneal Nerve ◽  
Cortical Excitability ◽  
Common Peroneal Nerve ◽  
Motor Cortical Excitability ◽  
The Common ◽  
Motor Cortical ◽  
Stimulation Of

scholarly journals The Location of Conduction Abnormalities in Human Entrapment Neuropathies

1976 ◽  
Vol 3 (2) ◽  
pp. 111-122 ◽  
Author(s):  
William F. Brown ◽  
Gary G. Ferguson ◽  
Michael W. Jones ◽  
Stephen K. Yates
Keyword(s):  
Peroneal Nerve ◽  
Common Peroneal Nerve ◽  
Medial Epicondyle ◽  
Direct Stimulation ◽  
Peroneus Longus ◽  
Entrapment Neuropathies ◽  
Conduction Abnormalities ◽  
Longus Muscle ◽  
The Common ◽  
Stimulation Of

SUMMARY:Direct stimulation of 23 median, 13 ulnar and 2 peroneal nerves at the time of surgical exploration has been used to locate, and characterize the conduction abnormalities in the nerves. The most frequent location of the major conduction abnormalities in the median nerve was in the first 1-2 cm distal to the origin of the carpal tunnel. In the ulnar nerve the important conduction abnormalities were located most frequently in the segments 1 cm proximal and distal to the medial epicondyle. In the peroneal nerve the major conduction abnormalities occurred proximal or distal to the entry point of the common peroneal nerve into the peroneus longus muscle.

Activity evoked by A- and C-afferent fibers in rat dorsal horn neurons and its relation to a flexion reflex

1983 ◽  
Vol 50 (5) ◽  
pp. 1108-1121 ◽  
Author(s):  
J. Schouenborg ◽  
B. H. Sjolund
Keyword(s):  
Dorsal Horn ◽  
Sural Nerve ◽  
Peroneal Nerve ◽  
Common Peroneal Nerve ◽  
Mechanical Stimuli ◽  
Dorsal Horn Neurons ◽  
C Fiber ◽  
The Common ◽  
Fiber Stimulation ◽  
Stimulation Of

The responses of 56 neurons recorded in the lumbosacral spinal cord of halothane-anesthetized rats were studied following the application of mechanical stimuli to the skin on the lateral aspect of the paw or electrical stimulation of the sural nerve. Only neurons driven by A- and C-fiber stimulation were considered. The evoked activity in a nerve supplying flexor muscles, the common peroneal nerve, was also recorded to evaluate possible relations between neuronal events and reflex discharges. To quantify the reflex output we also recorded the activity of 12 motoneurons. Four different populations of dorsal horn neurons activated by C-fibers could be distinguished. The neurons were classified on the basis of their responses to mechanical stimuli and of their location in the dorsal horn. Class 1 neurons were driven by nonnoxious stimulation only. Neurons driven by nonnoxious stimuli and noxious stimuli were denoted class 2S (superficial to the location of the maximal A-beta-fiber-evoked field potentials) or class 2D (deep to the same potential). Class 3 neurons were driven by noxious stimuli only. The functional characteristics of these four classes of neurons differed in many respects. The latency for the A-beta-fiber-evoked discharge was, on average, 2 ms longer in class 2S than in class 2D neurons, indicating a polysynaptic A-beta input to the former class of neurons. The C-fiber-evoked neuronal discharge often showed time-locked peaks of activity during the interval 120-170 ms. Such peaks of activity occurred, in general, later in class 2D neurons (mean, 157 ms) than in class 2S (mean, 137 ms) or in class 3 (mean, 140 ms), suggesting that the different classes received C-fiber input via partially different routes. The responses to repeated C-fiber stimulation also differed markedly among the four classes. After 16 single electrical stimulations (100 T (T = threshold strength for activating A-beta-afferents), 1 Hz), the C-fiber-evoked discharge in class 2D neurons was increased by 196%, whereas the corresponding value for those in classes 2S, 3, and 1 was 41, 24, and 38%, respectively. Ten of 14 class 2D neurons showed a simultaneous increase of the A-fiber-evoked discharge, indicating an increased excitability of these neurons after repeated impulses in C-fiber afferents. An early reflex discharge (latency, 6-10 ms) was evoked in the common peroneal nerve by electrical stimulation of the sural nerve.(ABSTRACT TRUNCATED AT 400 WORDS)

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