Reliability of the Soleus H-Reflex in Different Sitting Postures

The Soleus (SOL) Hoffmann reflex (H-reflex) is commonly recorded in sitting position. However, the reliability of recording is unknown. We assessed the reliability of SOL H-reflex amplitude measurements across multiple traces and sessions during erect, slumped, and slouched sitting postures using the generalizability theory. Five traces of the SOL H-reflex maximum amplitude (Hmax) were recorded from 10 healthy participants during erect, slumped, and slouched sitting postures in two sessions. A decision study analysis was then conducted to calculate the reliability coefficients of the Hmax for five traces and two sessions and to mathematically calculate the coefficients for seven and ten traces, and one and three sessions in the three sitting postures. For five traces and two sessions, the results showed reliability coefficients between 0.970 and 0.971, 0.980 and 0.979, and equal to 0.943 for erect, slumped, and slouched sitting, respectively. Averaging five traces of the Hmax in a single recording session was sufficient to obtain acceptable reliability in the three sitting postures (reliability range, 0.892–0.988). It was concluded that the SOL Hmax can be recorded during erect, slumped, and slouched sitting postures with adequate reliability.

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Acute Effects of Kinesiology Taping Stretch Tensions on Soleus and Gastrocnemius H-Reflex Modulations

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18094411 ◽

2021 ◽

Vol 18 (9) ◽

pp. 4411

Author(s):

Yung-Sheng Chen ◽

Shi Zhou ◽

Zachary J. Crowley-McHattan ◽

Pedro Bezerra ◽

Wei-Chin Tseng ◽

...

Keyword(s):

H Reflex ◽

Triceps Surae ◽

Reflex Modulation ◽

Hoffmann Reflex ◽

Acute Effects ◽

Physically Active ◽

M Wave ◽

Subject Design ◽

Minor Influence ◽

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This study examined the acute effects of stretch tensions of kinesiology taping (KT) on the soleus (SOL), medial (MG), and lateral (LG) gastrocnemius Hoffmann-reflex (H-reflex) modulation in physically active healthy adults. A cross-over within-subject design was used in this study. Twelve physically active collegiate students voluntarily participated in the study (age = 21.3 ± 1.2 years; height = 175.6 ± 7.1 cm; body weight = 69.9 ± 7.1 kg). A standard Y-shape of KT technique was applied to the calf muscles. The KT was controlled in three tension intensities in a randomised order: paper-off, 50%, and 100% of maximal stretch tension of the tape. The peak-to-peak amplitude of maximal M-wave (Mmax) and H-reflex (Hmax) responses in the SOL, MG, and LG muscles were assessed before taping (pre-taping), taping, and after taping (post-taping) phases in the lying prone position. The results demonstrated significantly larger LG Hmax responses in the pre-taping condition than those in the post-taping condition during paper-off KT (p = 0.002). Moreover, the ΔHmax/Mmax of pre- and post-taping in the SOL muscle was significantly larger during 50%KT tension than that of paper-off (p = 0.046). In conclusion, the stretch tension of KT contributes minor influence on the spinal motoneuron excitability in the triceps surae during rest.

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Facilitation of soleus H-reflex amplitude evoked by cutaneous nerve stimulation at the wrist is not suppressed by rhythmic arm movement

Experimental Brain Research ◽

10.1007/s00221-004-2092-x ◽

2004 ◽

Vol 159 (3) ◽

pp. 382-388 ◽

Cited By ~ 34

Author(s):

E. Paul Zehr ◽

Alain Frigon ◽

Nienke Hoogenboom ◽

David F. Collins

Keyword(s):

Nerve Stimulation ◽

Arm Movement ◽

H Reflex ◽

Cutaneous Nerve ◽

Reflex Amplitude

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Rhythmic arm cycling suppresses hyperactive soleus H-reflex amplitude after stroke

Clinical Neurophysiology ◽

10.1016/j.clinph.2008.02.016 ◽

2008 ◽

Vol 119 (6) ◽

pp. 1443-1452 ◽

Cited By ~ 39

Author(s):

Yasaman Barzi ◽

E. Paul Zehr

Keyword(s):

H Reflex ◽

Reflex Amplitude ◽

Arm Cycling

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Walking Phase Modulates H-Reflex Amplitude in Flexor Carpi Radialis

Journal of Motor Behavior ◽

10.1080/00222895.2013.854731 ◽

2013 ◽

Vol 46 (1) ◽

pp. 49-57 ◽

Cited By ~ 6

Author(s):

Antoinette Domingo ◽

Marc Klimstra ◽

Tsuyoshi Nakajima ◽

Tania Lam ◽

Sandra R. Hundza

Keyword(s):

H Reflex ◽

Reflex Amplitude ◽

Flexor Carpi Radialis

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Effect of cervicolumbar coupling on spinal reflexes during cycling after incomplete spinal cord injury

Journal of Neurophysiology ◽

10.1152/jn.00509.2017 ◽

2018 ◽

Vol 120 (6) ◽

pp. 3172-3186 ◽

Cited By ~ 6

Author(s):

R. Zhou ◽

B. Parhizi ◽

J. Assh ◽

L. Alvarado ◽

R. Ogilvie ◽

...

Keyword(s):

Spinal Cord ◽

Spinal Cord Injury ◽

H Reflex ◽

Spinal Reflexes ◽

Incomplete Spinal Cord Injury ◽

Reflex Amplitude ◽

Arm Cycling ◽

Cord Injury ◽

Leg Cycling ◽

Cycling Training

Spinal networks in the cervical and lumbar cord are actively coupled during locomotion to coordinate arm and leg activity. The goals of this project were to investigate the intersegmental cervicolumbar connectivity during cycling after incomplete spinal cord injury (iSCI) and to assess the effect of rehabilitation training on improving reflex modulation mediated by cervicolumbar pathways. Two studies were conducted. In the first, 22 neurologically intact (NI) people and 10 people with chronic iSCI were recruited. The change in H-reflex amplitude in flexor carpi radialis (FCR) during leg cycling and H-reflex amplitude in soleus (SOL) during arm cycling were investigated. In the second study, two groups of participants with chronic iSCI underwent 12 wk of cycling training: one performed combined arm and leg cycling (A&L) and the other legs only cycling (Leg). The effect of training paradigm on the amplitude of the SOL H-reflex was assessed. Significant reduction in the amplitude of both FCR and SOL H-reflexes during dynamic cycling of the opposite limbs was found in NI participants but not in participants with iSCI. Nonetheless, there was a significant reduction in the SOL H-reflex during dynamic arm cycling in iSCI participants after training. Substantial improvements in SOL H-reflex properties were found in the A&L group after training. The results demonstrate that cervicolumbar modulation during rhythmic movements is disrupted in people with chronic iSCI; however, this modulation is restored after cycling training. Furthermore, involvement of the arms simultaneously with the legs during training may better regulate the leg spinal reflexes.NEW & NOTEWORTHY This work systematically demonstrates the disruptive effect of incomplete spinal cord injury on cervicolumbar coupling during rhythmic locomotor movements. It also shows that the impaired cervicolumbar coupling could be significantly restored after cycling training. Actively engaging the arms in rehabilitation paradigms for the improvement of walking substantially regulates the excitability of the lumbar spinal networks. The resulting regulation may be better than that obtained by interventions that focus on training of the legs only.

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H-reflex (Hoffmann Reflex)

10.1007/springerreference_115812 ◽

2012 ◽

Cited By ~ 1

Keyword(s):

H Reflex ◽

Hoffmann Reflex

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Normal limits of side-to-side H-reflex amplitude variability

Archives of Physical Medicine and Rehabilitation ◽

10.1016/0003-9993(94)90327-1 ◽

1994 ◽

Vol 75 (1) ◽

pp. 3-7 ◽

Cited By ~ 19

Author(s):

Ward R. Jankus ◽

Lawrence R. Robinson ◽

James W. Little

Keyword(s):

H Reflex ◽

Reflex Amplitude ◽

Amplitude Variability ◽

Normal Limits

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Measuring Discrimination of Complex Musical Events

Journal of Research in Music Education ◽

10.2307/3345189 ◽

1977 ◽

Vol 25 (2) ◽

pp. 91-99 ◽

Cited By ~ 2

Author(s):

Warren F. Prince

Keyword(s):

Comparative Judgment ◽

University Student ◽

Perceptual Judgment ◽

Reasonable Accuracy ◽

Musical Compositions ◽

Large Complex ◽

Musical Works ◽

Reliable Instrument ◽

Acceptable Reliability ◽

Reliability Coefficients

This study describes the development of a reliable instrument to measure perceptual judgment in listening to large, complex musical compositions. Paired excerpts from existing compositions in a diversity of historical styles were taped and played to a panel of “expert” listeners. Some pairs were identical, some highly similar, some slightly similar, and some extremely different. The panel's codings were sorted for high and low consensus; the revised instrument was administered to university student samples, producing acceptable reliability coefficients. The study concludes that perception, memory, and comparative judgment in listening to complex musical works can be measured with reasonable accuracy by the instrument.

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