2006
DOI: 10.1152/jn.00765.2005
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Abstract: Tetanic neuromuscular stimulation evokes contractions by depolarizing motor axons beneath the stimulating electrodes. However, we have shown that extra torque can develop due to the discharge of spinal neurons recruited by the evoked sensory volley. The present experiments investigated whether extra torque in the ankle plantar- and dorsiflexors was associated with enhanced H-reflexes. The tibial and common peroneal nerves were stimulated using 7-s trains (20 Hz for 2 s, 100 Hz for 2 s, 20 Hz for 3 s). Extra to… Show more

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Cited by 47 publications
(92 citation statements)
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References 37 publications
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“…In fact, the development of extra torques was similar for the biceps and FPL despite their different Ia monosynaptic connectivity. Furthermore, the enhanced torques had similar profiles to those in lower limb muscles (8,9,33) and wrist flexors (1). The extra torque development in FPL shows that strong Ia monosynaptic projections are not required for the development of enhanced force of central origin (see Ref.…”
Section: Discussionmentioning
confidence: 76%
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“…In fact, the development of extra torques was similar for the biceps and FPL despite their different Ia monosynaptic connectivity. Furthermore, the enhanced torques had similar profiles to those in lower limb muscles (8,9,33) and wrist flexors (1). The extra torque development in FPL shows that strong Ia monosynaptic projections are not required for the development of enhanced force of central origin (see Ref.…”
Section: Discussionmentioning
confidence: 76%
“…In soleus, monosynaptic Ia connectivity to homonymous motoneurons has been identified as an important factor contributing to the development of extra force (33). Klakowicz (33) showed that the H reflex is depressed during the initial 20-Hz stimulation, but after the 100-Hz burst, the depression is lost, allowing the H reflex to contribute to the extra torque during the second 20-Hz interval. However, the large pulse width used during high-frequency stimulation over the skin surface will inevitably activate a mixture of muscle and skin afferents.…”
Section: Discussionmentioning
confidence: 99%
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