Key result
Hypoxia significantly increased baseline activity of group IV muscle afferents, and LFMS-induced activation was markedly reduced when hypoxia followed normoxia (+14% vs +27%).
Why the study?
Does oxygen supply influence the activation of group IV muscle afferents after low-frequency muscle stimulation in anesthetized rabbits?
Population
Anesthetized rabbits
Comparison
3-min period of low-frequency muscle stimulation… vs Baseline and different oxygenation conditions
Design
Preclinical
Authors
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Hypoxia may modulate muscle afferent responses in rabbits; leaves open translation to human sensorimotor control or stimulation therapies.
Does oxygen supply influence the activation of group IV muscle afferents after low-frequency muscle stimulation in anesthetized rabbits?
Acute hypoxia alters the sensorimotor control of skeletal muscles by reducing LFMS-induced activation of group IV afferents, which is facilitated after reoxygenation.
Arbogast et al. (2000) studied this question. Low-frequency muscle stimulation (LFMS) under hypoxia or hyperoxia vs. Normoxia and baseline rest was evaluated on Activation of group IV muscle afferents. Hypoxia significantly increased baseline activity of group IV muscle afferents, and LFMS-induced activation was markedly reduced when hypoxia followed normoxia (+14% vs +27%).
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