Between-day reliability of upper extremity H-reflexes

Stowe, Ann M.; Hughes-Zahner, L.; Stylianou, Antonis P.; Schindler-Ivens, Sheila; Quaney, Barbara M.

doi:10.1016/j.jneumeth.2008.01.031

Cited by 27 publications

(36 citation statements)

References 12 publications

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“…The reliability of H-reflex test has been examined under various experimental conditions, for instance, in different body positions [17,18] and age populations [19], with and without conditioningtest (C-T) stimulations [20], and in the upper [21,22] and lower [23] limb muscles. In general, these investigations have indicated that the H-reflex test is a highly reliable assessment in repeated tests.…”

Section: Reliability Of H-reflexmentioning

confidence: 99%

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Soleus H-reflex and its relation to static postural control

Chen

Zhou

2011

Gait & Posture

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Section: Reliability Of H-reflexmentioning

confidence: 99%

“…In contrast, the bipolar stimulation is used at a more focused location for stimulation on the nerve of interest [24]. Both the cathode and anode are places on the same nerve, for instance, on the median nerve for testing the H-reflex of the flexor carpi radialis [22].…”

Section: Configuration and Placement Of The Stimulation Electrodesmentioning

confidence: 99%

Soleus H-reflex and its relation to static postural control

Chen

Zhou

2011

Gait & Posture

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“…Other studies have analysed the changes in the amplitude of the H-reflex during different times of day. No daily changes were observed for the responses of the flexor carpi radialis muscle [44][45][46]. On the other hand, the soleus muscle showed a significant increase in the amplitude of the H-reflex after 12 hours [45].…”

Section: Applications Of the Hoffman's Reflex Measurementmentioning

confidence: 88%

“…The most commonly assessed muscles of the lower limbs that display the H-reflex are the soleus muscle [37][38][39][40] and the gastrocnemius muscle [5,41,42]. While the H-reflex is very difficult to observe in the upper limbs, some researchers have shown that it can be induced for the flexor carpi radialis muscle [43][44][45][46][47] and the extensor carpi radialis muscle [43,46].…”

Section: Applications Of the Hoffman's Reflex Measurementmentioning

confidence: 99%

The H-reflex as an important indicator in kinesiology

Gajewski¹,

Mazur-Różycka²

2018

Hum Mov.

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Hoffmann's reflex (the H-reflex) is an electrically-induced reflex that is analogous to the mechanically-induced stretch reflex controlled by the spinal cord. The most common measurements performed concerns the electrical response of the soleus muscle to electrical stimulation in the tibial nerve. The response is induced by a discharge occurring in a motoneuron. The latency time of the H-reflex for the soleus muscle amounts to 30-40 ms. An increase in the strength of the stimulus induces a direct response from the muscle, i.e. the M-wave. The latency time of the M-wave amounts to 4-5 ms. A sport training may affect the parameters of the H-reflex. The Hmax/Mmax ratio is the highest among persons engaged in endurance sports and the lowest among those practising speed and strength sports. A decreased amplitude of the H-reflex characterises the level of the central fatigue, while a decrease in the M-wave amplitude is attributed to the peripheral fatigue. Usually, a decrease in Hmax/Mmax ratio is observed post-exercise. Different times of recovery were reported in the literature. No clear quantitative laws have yet been established that govern the course of the reflex as a result of fatigue. The H-reflex still remains within the scope of the interests of kinesiology as a valuable source of information about the reflex functions in the human motor system.

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“…Surface EMG signals were recorded with self-adhesive Ag-AgCl electrodes (Skintact, 1.0 cm diameter). Electrodes were positioned over the belly of the FCR and over the radial styloid with the ground electrode mounted over the ulnar sytloid (Christie et al 2005;Stowe et al 2008).…”

Section: H-rexex Testsmentioning

confidence: 99%

Spinal and cortical activity-dependent plasticity following learning of complex arm movements in humans

et al. 2012

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Activity-dependent plasticity is a fundamental requirement for human motor learning, which takes place at several stages of the motor system and involves various mechanisms in neuronal circuitry. Here, we investigate parameters of cortical and spinal excitability before and immediately after a single session of locomotion-like arm training (LMT) or sequential visuo-motor learning (VMT). Both training paradigms focused especially on mainly activating the flexor carpi radialis muscle (FCR). The activity-dependent change in the excitability of FCR-associated neurons was investigated using standard transcranial magnetic stimulation, including analysis of motor-evoked potentials (MEP) amplitude, short-interval intracortical inhibition and intracortical facilitation (ICF). Furthermore, spinal plasticity was also assessed by means of homosynaptic FCR H-reflex depression (HD). LMT decreased HD and ICF. In contrast, VMT had no significant effect on cortical and spinal parameters. There was a nonsignificant tendency of an increase in MEP amplitudes after both interventions. This implies that human locomotor-related learning involves spinal mechanisms. Despite the decreasing importance of quadrupedal coordination in the course of evolution, these changes in transsynaptic plasticity may reflect a persisting locomotor memory-encoding function in the spinal circuitry of the human upper extremities. Evaluating FCR HD might be helpful for the evaluation and development of locomotor rehabilitation strategies.

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Between-day reliability of upper extremity H-reflexes

Cited by 27 publications

References 12 publications

Soleus H-reflex and its relation to static postural control

Soleus H-reflex and its relation to static postural control

The H-reflex as an important indicator in kinesiology

Spinal and cortical activity-dependent plasticity following learning of complex arm movements in humans

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