The effect of the forearm position, prone vs. supine, on the excitability of the H-reflex in flexor carpi radialis (FCR) muscle was tested in nine adult volunteers by comparing the recruitment profiles of the H and M waves. The H-reflex size, normalized to the maximal M response, was lower when the forearm was supine than when it was prone, with an average reduction of about 50% over most of the H-recruitment curve. In three wrist positions, intermediate between prone and supine, the amount of reflex attenuation was related to the prono-supination angle. Control experiments excluded that the changes in the H reflex excitability were due to displacements of the stimulating or recording electrodes.
Changes in the excitability of the H-reflex in wrist flexors related to the prone or supine position of the forearm in man / F. Baldissera, G. Bellani, P. Cavallari, S. Lalli. - In: NEUROSCIENCE LETTERS. - ISSN 0304-3940. - 295:3(2000), pp. 105-108. [10.1016/S0304-3940(00)01604-9]
Changes in the excitability of the H-reflex in wrist flexors related to the prone or supine position of the forearm in man
F. BaldisseraPrimo
;P. CavallariPenultimo
;
2000
Abstract
The effect of the forearm position, prone vs. supine, on the excitability of the H-reflex in flexor carpi radialis (FCR) muscle was tested in nine adult volunteers by comparing the recruitment profiles of the H and M waves. The H-reflex size, normalized to the maximal M response, was lower when the forearm was supine than when it was prone, with an average reduction of about 50% over most of the H-recruitment curve. In three wrist positions, intermediate between prone and supine, the amount of reflex attenuation was related to the prono-supination angle. Control experiments excluded that the changes in the H reflex excitability were due to displacements of the stimulating or recording electrodes.Pubblicazioni consigliate
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