Glossopharyngeal Nerve (CN IX)

00:01 Cranial nerve IX or glossopharyngeal is also going to have multiple nuclei reflecting the fact that it has multiple types of functions.

00:12 It will have both motor and sensory functions.

00:16 Here we see the glossopharyngeal nerve and close approximation with the vagus nerve.

00:21 As they both exit the cranial cavity through the jugular foramen.

00:26 It's going to form several ganglia and it's going to actually provide parasympathetic innervation to the parotid gland.

00:34 It's also going to supply motor innervation to a single muscle, the stylopharyngeus.

00:42 It's going to form part of the plexus with the vagus nerve called the pharyngeal plexus and that's going to provide sensory innervation in the pharynx.

00:54 It's also going to do specials sensation in addition to general sensation to the posterior third of the tongue.

01:02 It's also going to have a very important function in sensing pressure and chemical changes in the carotid sinus.