The amplitude modulation of the Quadriceps H-reflex in relation to the knee joint action during walking

Larsen, Birgit Tine; Mrachacz-Kersting, Natalie; Lavoie, Brigitte; Voigt, Michael

doi:10.1007/s00221-005-0237-1

Cited by 23 publications

(34 citation statements)

References 37 publications

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“…Furthermore, the assumption that feedback from muscle spindles should be most significantly diminished during jaw opening, so that counterproductive forces of the jaw elevator muscles can be avoided (van der Bilt et al, 1997), does not necessarily have an analogy in limb studies. Neither modulation of the quadriceps H-reflex (Larsen et al, 2006) nor the biceps femoris stretch reflex (Faist et al, 1999) follows the classic pattern of reciprocal inhibition between antagonistic muscles during walking. The gain of reflexes in both of these muscles increases during the times when the muscles are lengthening rapidly and is then modulated downward during shortening.…”

Section: Discussionmentioning

confidence: 98%

Modulation of Masseteric Reflexes by Simulated Mastication

Naser-ud-Din

Sowman²,

Dang

et al. 2009

J Dent Res

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It is well-known that limb muscle reflexes are modulated during human movements. However, little is known about the existence of equivalent masticatory muscle reflex modulation. We hypothesized that masticatory reflexes would be modulated during chewing so that smooth masticatory movements occur. To examine this hypothesis, we studied the modulation of inhibitory reflexes evoked by periodontal mechanoreceptor activation and of excitatory reflexes evoked by muscle spindle activation during simulated mastication. In 28 participants, 1- and 2-N mechanical taps were delivered to the incisor. Reflex responses to these taps were examined in the average masseteric electromyogram. To differentiate between periodontal mechanoreceptor- and muscle-spindle-mediated reflex components, we performed experiments prior to, and in the presence of, periodontal anesthesia. Both periodontal mechanoreceptor and muscle spindle reflexes were reduced during simulated masticatory movements.

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Section: Discussionmentioning

confidence: 98%

Modulation of Masseteric Reflexes by Simulated Mastication

Naser-ud-Din

Sowman²,

Dang

et al. 2009

J Dent Res

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“…Future research is needed to investigate how the constraints and the goal function of the optimization can be adapted in order to enforce neurophysiologically imposed control aspects which may affect the observed co-contraction patterns (Larsen et al 2006).…”

Section: Discussionmentioning

confidence: 99%

Dynamic simulation of human motion: numerically efficient inclusion of muscle physiology by convex optimization

et al. 2007

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Determining the muscle forces that underlie some experimentally observed human motion, is a challenging biomechanical problem, both from an experimental and a computational point of view. No non-invasive method is currently available for experimentally measuring muscle forces. The alternative of computing them from the observed motion is complicated by the inherent overactuation of the human body: it has many more muscles than strictly needed for driving all the degrees of freedom of the skeleton. As a result, the skeleton's equations of motion do not suffice to determine the muscle forces unambiguously. Therefore, muscle force determination is often reformulated as a (large-scale) optimization problem.Generally, the optimization approaches are classified according to the formalism, inverse or forward, adopted for solving the skeleton's equations of motion. Classical inverse approaches are fast but do not take into account the constraints imposed by muscle physiology. Classical forward approaches, on the other hand, do take the muscle physiology into account but are extremely costly from a computational point of view.

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“…Recruitment of the quadriceps H-reflex curves were challenging due to the occasional overlap between the M- and H-waves. This issue was addressed previously with a post-hoc analysis by subtracting M max from the trials with H-reflex response (Larsen et al, 2006; Larsen & Voigt, 2006). However, due to the custom-defined selection of the descending portion of M max for the subtraction in subjects and the time and magnitude difference between the EMG responses, this post-hoc analysis is vulnerable to the variability between subtracted signals.…”

Section: Methodsmentioning

confidence: 99%

“…Thus, as a probe, electrically evoking H-reflex is more reliable and consistent in identifying the altered neuromuscular pathways, especially for identifying the reflex sensitivity and modulation in neural control of movement (Misiaszek, 2003). The modulation of H-reflexes in knee extensors and ankle extensors have been well documented (Dietz et al, 1990) and associated to joint angles of knee and ankle during gait (Larsen et al, 2006; Sinkjær et al, 1996). Enhanced intersegmental facilitation of soleus muscle from hyperactive quadriceps afferents has been revealed after stroke (Dyer et al, 2009; Dyer et al, 2011) and related to altered activation timings of knee and ankle extensors during gait following stroke (Dyer et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Rectus femoris hyperreflexia predicts knee flexion angle in Stiff-Knee gait after stroke

Akbaş

Kim

Doyle

et al. 2019

Preprint

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Stiff-knee gait (SKG) after stroke is often accompanied by decreased knee flexion angle during the swing phase. The decreased knee flexion has been hypothesized to originate from excessive quadriceps activation. However, it is unclear whether this activation is due to poor timing or hyperreflexia, both common post-stroke impairments. The goal of this study was to investigate the relation between quadriceps hyperreflexia in post-stroke SKG with knee flexion angle during walking. The rectus femoris (RF) H-reflex was recorded in eleven participants with post-stroke SKG and ten healthy controls during standing and walking during toe-off. In order to separate the effects of poorly timed quadriceps muscle activation from hyperreflexia, healthy individuals voluntarily increased quadriceps activity using RF electromyographic (EMG) biofeedback during standing and pre-swing upon H-reflex stimulation. We observed a negative correlation (R = -0.92, p=0.001) between knee flexion angle and RF H-reflexes in post-stroke SKG. In contrast, H-reflex amplitude in healthy individuals in presence (R = 0.47, p = 0.23) or absence (R =-0.17, p = 0.46) of increased RF activity had no correlation with knee flexion angle. The RF H-reflex amplitude differed between standing and walking in healthy individuals, including when RF activity was increased voluntarily (d = 2.86, p = 0.007), but was not observed post-stroke (d =0.73, p = 0.296). Thus, RF reflex modulation is impaired in post-stroke SKG.Further, RF hyperreflexia, as opposed to overactivity, may play a role in knee flexion kinematics in post-stroke SKG. Interventions targeting self-regulated quadriceps hyperreflexia may be effective in promoting better neural control of the knee joint and thus better quality of walking post-stroke.

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The amplitude modulation of the Quadriceps H-reflex in relation to the knee joint action during walking

Cited by 23 publications

References 37 publications

Modulation of Masseteric Reflexes by Simulated Mastication

Modulation of Masseteric Reflexes by Simulated Mastication

Dynamic simulation of human motion: numerically efficient inclusion of muscle physiology by convex optimization

Rectus femoris hyperreflexia predicts knee flexion angle in Stiff-Knee gait after stroke

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