Parasympathetic innervation to the ascending colon is supplied by the vagus nerve. Input from the parasympathetic nervous system occurs via the vagus nerve. The pharynx is innervated by the pharyngeal plexus of the vagus nerve. The primary neural supply is from both the vagus and glossopharyngeal nerves. A feedback response to the medulla is triggered via the afferent vagus nerve. It does this by influencing the sympathetic and parasympathetic nervous systems via the vagus nerve. The superior laryngeal nerve is a branch of the vagus nerve. This vein runs in the carotid sheath with the common carotid artery and vagus nerve. The vagus gives no parasympathetic to the cranium. Somatostatin release is inhibited by the Vagus nerve. Its muscles are controlled by the pharyngeal branch of the vagus nerve. Some organs also receive a nerve supply from the vagus nerve. Cardiovascular stimuli are carried by the vagus nerve. Clonidine also may cause bradycardia, probably by increasing signaling through the vagus nerve. The larynx is innervated by branches of the vagus nerve on each side.