Why the study?
Does head-down neck flexion increase sympathetic nerve outflow and vascular resistance in humans?
Population
9 human subjects
Comparison
10 min of head-down neck flexion (HDNF) vs 10 min of baseline
Design
Other
Follow-up
10 min
Authors
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Hypothesis-generating for vestibulosympathetic reflexes in humans; prospective studies needed before clinical relevance.
Does head-down neck flexion increase sympathetic nerve outflow and vascular resistance in humans?
Head-down neck flexion elicits increases in calf vascular resistance mediated by augmentation of muscle sympathetic nerve activity, suggesting engagement of vestibulosympathetic reflexes in humans.
Shortt et al. (1997) studied this question.
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