| glossopharyngeal nerve | nerve associated with the third pharyngeal arch |
| Nucleus Ambiguus | Motor nucleus of glossopharyngeal nerve innervates the stylopharngeus muscle |
| inferior salivatory nucleus | Parasympathetic nucleus of glossopharyngeal nerve innervates the
parotid gland |
| upper 1/3 of nucleus solitarius | Sensory nuclei of glossopharyngeal nerve Innervates the posterior one third of the tongue |
| lower 2/3 of nucleus solitarius | Sensory nuclei of glossopharyngeal nerve Innervates the carotid sinus, m.M. OF pharynx, post. 1/3 of tongue and middle ear. |
| spinal trigeminal nucleus | Sensory nuclei of glossopharyngeal nerve Innervates the small area behind ear |
| tympanic branch | glossopharyngeal branch providing sensory fibers to the middle ear and parasympathetic fibers to the parotid gland. |
| Stylopharyngeus | glossopharyngeal branch to the stylopharyngeus |
| Tonsillar | glossopharyngeal branch provide sensory and parasympathetic innervation to the tonsils and oropharynx |
| Nerve to carotid sinus | glossopharyngeal branch provide sensory innervation to the carotid sinus |
| Lingual branch | glossopharyngeal branch provide sensory information from the dorsal 1/3 of the tongue |
| Lesions in IX | Loss of pharyngeal gag reflex ,carotid sinus reflex & taste sensation from the posterior 1/3 of the tongue |
| vagus nerve | associated with two pharyngeal arches – the fourth and sixth.
travels in the carotid sheath, posterior to the common carotid
artery and internal jugular vein |
| cricothyroideus and soft palate muscles (excluding tensor veli palatini) | Fourth pharyngeal arch muscles supplied by superior laryngeal branch of the vagus nerve |
| all intrinsic laryngeal muscles except cricothyroideus | Sixth pharyngeal arch muscles supplied by recurrent laryngeal branch of the vagus nerv |
| Nucleus Ambiguus | Motor nucleus of vagus nerve that innervates muscles of larynx,
pharynx except stylopharyngeus and palate except tensor palati |
| Dorsal motor nucleus of vagus | Parasympathetic nucleus of vagus nerve that innervates thoracic
and abdominal organs as far as left colic flexure |
| upper 1/3 of nucleus solitarius | Sensory nuclei of vagus nerve that Innervates the epiglottis and most posterior part of tongue |
| lower 2/3 of nucleus solitarius | Sensory nuclei of vagus nerve that Innervates the M.M. of thoracic and abdominal viscera |
| spinal trigeminal nucleus | Sensory nuclei of vagus nerve that Innervate ext. auditor meatus and tympanic membrane |
| oesophagus, stomach, small intestine, and the distal 2/3 of the colon | vagus nerve in Abdomen supply |
| Meningeal branch | Vagus nerve branches supply the dura mater of the posterior cranial fossa. |
| Auricular branch | Vagus nerve branches Supply external meatus and tympanic membrane. Stimulation can cause reflex coughing and even cardiac arrest |
| Pharyngeal branch | Vagus nerve branches Supply All the muscles of pharynx with the exception of the & All the muscles of soft palate with the exception of the tensor palate stylopharyngeus |
| laryngopharynx and superior larynx (includingg taste to the epiglottis) | Superior laryngeal nerve Internal branch – sensory innervation to : |
| cricothyroideus muscle | Superior laryngeal nerve External branch – motor innervation to |
| Lesions in vagus nerve | dysphagia , Hoarseness of voice & Regurgitation of food from nose |
