Key result
Cervical sympathetic trunk section decreased ventilation during normoxia in conscious rats, while sympathetic stimulation in anaesthetized rats inhibited breathing and reduced upper airway resistance.
The cervical sympathetic nerves exert important influences on ventilation and upper airway resistance in rats.
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Denervation reduces normoxic ventilation in rats; leaves open sympathetic modulation of human upper airway patency.
O’Halloran et al. (1998) studied this question. Cervical sympathetic trunk section and electrical stimulation vs. Baseline/control state was evaluated on Ventilation and upper airway resistance. Cervical sympathetic trunk section decreased ventilation during normoxia in conscious rats, while sympathetic stimulation in anaesthetized rats inhibited breathing and reduced upper airway resistance.
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