Modulation of the Triceps Surae H-Reflex with Training
| Autor: | Mark H. Trimble, David M. Koceja |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Adult
Reflex Stretch medicine.medical_specialty Adolescent Electromyography Physical medicine and rehabilitation Triceps surae muscle medicine Postural Balance Humans Stretch reflex Muscle Skeletal Neuronal Plasticity medicine.diagnostic_test business.industry Muscles General Neuroscience General Medicine Balance board Electric Stimulation Sagittal plane Biomechanical Phenomena medicine.anatomical_structure Motor Skills Arm Physical therapy H-reflex medicine.symptom business Muscle Contraction Muscle contraction |
| Zdroj: | International Journal of Neuroscience. 76:293-303 |
| ISSN: | 1543-5245 0020-7454 |
| DOI: | 10.3109/00207459408986011 |
| Popis: | Thirteen neurologically healthy adults were asked to balance on a specially designed balance board. This board allowed rotation in the sagittal plane only. Muscle activity of the triceps surae and tibialis anterior was sampled at 2 kHz and recorded. When the subject was balanced, soleus H-reflexes were elicited in the right leg with a constant-current stimulus pulse. The peak to peak amplitude of the soleus H-reflex served as the perturbation to the subject's balance as well as the dependent variable in question. Subjects performed three blocks (7 H-reflexes/block) of standing control trials with the balance board supported, and seven blocks of balancing trials. Prior to each block, maximal M-waves were recorded to ensure electrode stability across blocks. Results indicated that the subjects were able to significantly reduce (p.001) the gain the soleus H-reflex while balancing and after the balance training. As a group, the subjects decreased their peak to peak amplitude of the soleus H-reflex by 26.2 percent from the initial standing block to the last balancing block. Moreover, subjects were also able to significantly reduce the gain of their standing control H-reflexes, supporting the notion of longer-term adaptability of the spinal stretch reflex. It is concluded that the progressive reduction in the H-reflex gain with short-term training may represent functional adaptation in the central nervous system. |
| Databáze: | OpenAIRE |
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