Recent research has disclosed that neurotransmitters and neuropeptides released within
the autonomic nervous system exert homeostatic control of nasal secretion. Although
cholinergic and adrenergic influences have long been thought to be the predominant
mechanisms, the nonadrenergic, noncholinergic responses may have more sutble, longer-
lasting effects. Peptides from sensory nerves, such as calcitonin gene related peptide,
substance P, and neurokinin A, may particiate in axon response-mediated vasodilation and …