The changes in peak facilitation and slope of facilitation of the H-reflex were compared to the parameters of an isometric plantarflexion task. The amplitude of the reflex was significantly greater for reflexes elicited within 50 msec. of the onset of soleus muscle activity. Neither peak amplitude of the reflex nor slope correlated with rate of rise of isometric force; however, they did show a modest relationship between premotor time and reaction time.
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References
1.
EichenbergerA.RueggD. G. (1984) Relation between the specific H-reflex facilitation preceding a voluntary movement and movement parameters in man. Journal of Physiology, 47, 495–559.
2.
FrankJ. S. (1986) Spinal motor preparation in humans. Electroencephalography and Clinical Neurophysiology, 63, 361–370.
3.
MichieP. T.ClarkeA. M.SindenJ. D.GlueL. T. (1976) Reaction time and spinal excitability in a simple reaction time task. Physiological Behavior, 16, 311–315.
4.
RiedoR.RueggD. G. (1988) Origin of the specific H-reflex facilitation preceding a voluntary movement in man. Journal of Physiology, 387, 371–388.
5.
SullivanS. J.WilliamsL. R.SeaborneD. E.MorelliM. (1991) Effects of massage on alpha motoneuron excitability. Physical Therapy, 71, 555–560.
