منابع مشابه
After stroke bidirectional modulation of soleus stretch reflex amplitude emerges during rhythmic arm cycling
OBJECTIVES after stroke a typical presentation is exaggerated stretch reflexes (SRs) on the more affected (MA) side. The present study evaluated the contribution of presynaptic inhibition (PSI) induced by arm cycling and homosynaptic depression (HD) to the modulation of hyperreflexia at the ankle after stroke. Possible asymmetry of these effects between the MA and less affected (LA) legs was al...
متن کاملThe stretch reflex and H-reflex of the human soleus muscle during walking.
Due to the complexity of applying a well-defined stretch during human walking, most of our knowledge about the short latency stretch reflex modulation in humans is based on H-reflex studies. To illuminate the difference between the two methodologies, both types of reflexes were evoked in the same subjects, same experiment. Stretch reflexes were evoked via a stretch device capable of evoking str...
متن کاملStretch of quadriceps inhibits the soleus H reflex during locomotion in decerebrate cats.
Previously, it has been demonstrated that afferent signals from the quadriceps muscles can suppress H reflexes in humans during passive movements of the leg. To establish whether afferent input from quadriceps contributes to the modulation of the soleus H reflex during locomotion, the soleus H reflex was conditioned with stretches of the quadriceps muscle during bouts of spontaneous treadmill l...
متن کاملEffect of afferent feedback and central motor commands on soleus H-reflex suppression during arm cycling.
Suppression of soleus H-reflex amplitude in stationary legs is seen during rhythmic arm cycling. We examined the influence of various arm-cycling parameters on this interlimb reflex modulation to determine the origin of the effect. We previously showed the suppression to be graded with the frequency of arm cycling but not largely influenced by changes in peripheral input associated with crank l...
متن کاملControl of soleus motoneuron excitability during muscle stretch in man.
The relative contributions of intramuscular and extramuscular receptors to changes in the reflex excitability of soleus motoneurons, following muscle stretch, have been studied in man. It was found that reflex excitability was decreased by muscle stretch. The extent of the decrease was related to the amount of stretch, irrespective of whether the latter was produced by dorsiflexion of the ankle...
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ژورنال
عنوان ژورنال: Motor Control
سال: 2001
ISSN: 1087-1640,1543-2696
DOI: 10.1123/mcj.5.1.36