Podcast
Questions and Answers
Where does the facial nerve arise in the brain?
Where does the facial nerve arise in the brain?
Pons
What is the name of the small sensory root of the facial nerve?
What is the name of the small sensory root of the facial nerve?
Sensory root
The two roots of the facial nerve travel through the internal acoustic meatus into the facial canal.
The two roots of the facial nerve travel through the internal acoustic meatus into the facial canal.
True
What are the 3 branches of the facial nerve before leaving the facial canal?
What are the 3 branches of the facial nerve before leaving the facial canal?
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What is the function of the Greater Petrosal Nerve?
What is the function of the Greater Petrosal Nerve?
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What is the function of the Nerve to Stapedius?
What is the function of the Nerve to Stapedius?
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What is the function of the Chorda Tympani?
What is the function of the Chorda Tympani?
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How does the facial nerve exit the facial canal?
How does the facial nerve exit the facial canal?
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Study Notes
Intracranial
- The nerve arises in the pons, an area of the brainstem
- It begins as two roots: a large motor root and a small sensory root
- Two roots travel through the internal acoustic meatus into the facial canal
- The facial nerve exits the cranium via the stylomastoid foramen
Three Branches before leaving Facial Canal
- Greater petrosal nerve → parasympathetic fibres to mucous glands of nose, paranasal sinus & palate. Motor fibers to stapedius muscle
- Nerve to stapedius → motor fibers for dampening down loud noises
- Chorda tympani → special sensory fibres to the anterior 2/3 of tongue (taste function), & parasympathetic fibres to the submandibular & sublingual glands
Extracranial
- Posterior auricular nerve → Posterior belly of the digastric muscle & stylohyoid muscle
- Then facial nerve exits facial canal (of the skull) via the stylomastoid foramen
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Description
Test your knowledge on the anatomy of the facial nerve, including its origins and branches both intracranially and extracranially. This quiz covers the main functions and pathways of the facial nerve, as well as its role in sensory and motor functions within the cranial structure.
