L31 HNS
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27 questions
| 🇬🇧 | 🇬🇧 |
| 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 |