Modulation of H reflexes in the forearm during voluntary teeth clenching in humans | Semantic Scholar (2024)

It is demonstrated that the spinal cord excitability in the motor pathway of a leg muscle was considerably raised during clenching on a soft stabilization appliance compared to a hard stabilization appliance, suggesting that a powerful biting action on a resilient intraoral appliance strongly influences the motor system in humans.

The CSP is modulated by remote influences differently depending on the type of muscle contraction (tonic vs. phasic) and/or where it is realized (tooth, upper or lower limb).

Evidence is found to suggest that teeth clenching during activities involving the lower and upper limbs can enhance neuromotor stimulation, through the H-Reflex.

It is admitted that to spontaneously make a link between the oral sphere and these signs or symptoms seems often illogical, but this kind of persistent events must incitate any clinician to unearth and eliminate the severe parafunctional clenching.

Low level clenching was common during weight bearing exercises and there were gender, exercise-type and muscle differences in VTC, which depended on threshold magnitudes defining clenching.

The proposed method to use facial electrical stimulation to control maximal voluntary contraction (MVC) of the upper limbs is based on a body mechanism in which the contraction of the masseter muscles enhances MVC of the limb muscles.

The findings suggest that it is advisable to use a customized bite-aligning mouthpiece to improve strength and power performance.

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It is concluded that the soleus H reflex is facilitated in association with voluntary teeth clenching, and that descending influences from the cerebral cortex, as well as peripheral afferent impulses from the oral-facial region, are involved in this facilitation.

It is 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.

The H‐reflex of the flexor carpi radialis is easily obtainable and can be recorded by a simple nerve conduction technique detailed in this communication.