Results 201 to 210 of about 141,787 (254)
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Diurnal H-reflex variation in mice
Experimental Brain Research, 2005Mice exhibit diurnal variation in complex motor behaviors, but little is known about diurnal variation in simple spinally mediated functions. This study describes diurnal variation in the H-reflex (HR), a wholly spinal and largely monosynaptic reflex.
Jonathan S, Carp +3 more
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Posture modulates the sensitivity of the H-reflex
Experimental Brain Research, 2018The effect of body posture on the human soleus H-reflex via electrical stimulation of the tibial nerve at the popliteal fossa was studied. All parameters that may influence the reflex were controlled stringently. H-reflexes were elicited in three different body postures while keeping the level of background muscle activation to a minimum.
Serpil Cecen +7 more
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2009
Technically, the H-reflex test is relatively simple to perform in a clinical neurophysiology laboratory. A thorough understanding of the physiologic basis, sources of error, and clinical applications and limitations enhances the usefulness of the H reflex.
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Technically, the H-reflex test is relatively simple to perform in a clinical neurophysiology laboratory. A thorough understanding of the physiologic basis, sources of error, and clinical applications and limitations enhances the usefulness of the H reflex.
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2003
H-reflexes are commonly elicited electrophysiological responses that are produced by submaximal stimulation of large afferent fibers and subsequent activation of motoneurons in the anterior horn of the spinal cord, possibly monosynaptically. In adults, H-reflexes are consistently elicited in calf muscles and the homologous forearm flexor muscles.
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H-reflexes are commonly elicited electrophysiological responses that are produced by submaximal stimulation of large afferent fibers and subsequent activation of motoneurons in the anterior horn of the spinal cord, possibly monosynaptically. In adults, H-reflexes are consistently elicited in calf muscles and the homologous forearm flexor muscles.
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H Reflexes Recorded During Locomotion
2002We recorded H reflexes and the biomechanics of movement during locomotion. The soleus H reflex was strongly modulated during normal walking, depressed during the swing phase and modulated with the EMG in the stance phase. The amplitude of the H reflex increased with the EMG activity and was larger during running than walking.
Dyhre-Poulsen, Poul +1 more
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Circadian rhythm in rat H-reflex
Brain Research, 1994We measured soleus H-reflex in the Sprague-Dawley rat as a function of time of day. H-reflex amplitude displayed a marked diurnal variation, even though background EMG and M-response amplitude were stable through the day. The H-reflex was largest in the late morning and smallest around midnight.
X Y, Chen, J R, Wolpaw
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Optimal stimulus duration for the H reflex
Muscle & Nerve, 1989AbstractAuthorities advocate different stimulus durations to produce an H reflex. In order to find the optimal stimulus duration for recording H reflexes, the recruitment curves for H reflexes and M responses were studied in 10 healthy subjects. The H reflex was recorded in the upper and lower extremities, and the durations of the electrical stimulus ...
M, Panizza, J, Nilsson, M, Hallett
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Adductor T and H reflexes in humans
Muscle & Nerve, 2006AbstractIn the belief that changes in the adductor reflex (AR) may be helpful in evaluating lumbar root and plexus lesions, expression of the AR was studied in 43 healthy human subjects. ARs elicited with an electronic reflex hammer were recorded from the inner side of the proximal thigh using needle and surface electrodes, and patellar reflexes (PRs ...
Ertekin, Cumhur +4 more
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H reflex latency in the healthy elderly
Muscle & Nerve, 1994AbstractThe purpose of this study was to evaluate prospectively and analyze the relationship of tibial nerve H reflex latency to age, sex, leg length, and skin temperature in a large healthy elderly population. The H reflex was recorded bilaterally in 92% of 103 carefully screened individuals aged 60–88 years. The mean H reflex latency was 30.8 (SD = 2.
F J, Falco +3 more
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Fractal correlation in human H-reflex
Experimental Brain Research, 1990The amplitude of the H-reflex has been known to have considerable variability even if the intensity of the stimulation is held constant. However, previous studies largely ignored the time-dependent profile of this variability. Recent mathematical analyses have shown that some seemingly irregular biological signals have fractal properties.
D, Nozaki, K, Nakazawa, Y, Yamamoto
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