Facial Nerve Flashcards
What is the attachment of the facial nerve?
Lateral surface of brainstem, between pons and medulla oblongata
What are the 3 parts which make the facial nerve a mixed nerve?
- Motor
- Sensory
- Parasympathetic
Where is the sensory root of the facial nerve located?
Medulla oblongata
Where is the motor root of the facial nerve located?
Pons
What are the two roots of the facial nerve?
- Small sensory root
2. Large motor root
How do the motor and sensory roots of the facial nerve leave the cranial cavity?
Internal acoustic meatus
What is the function of the motor part of the facial nerve?
Control muscles of facial expression
What is the function of the parasympathetic part of the facial nerve?
Control lacrimal, submandibular and sublingual glands
What is the function of the sensory part of the facial nerve?
Detect taste in anterior 2/3 of the tongue
Describe the course of the facial nerve after entering the internal acoustic meatus
Passes through facial canal in petrous part of temporal bone
Where does the facial nerve emerge from?
Base of the skull through the stylomastoid foramen
Where does the facial nerve go after it emerges from the base of the skull?
Transverses parotid gland
What 3 branches are given off the facial nerve within the facial canal?
- Greater petrosal
- Nerve to stapedius muscle
- Chorda tympani nerve
What 3 branches are given off the facial nerve just below stylomastoid foramen?
- Nerve to post. belly of digastric
- Nerve to stylohyoid muscle
- Posterior auricular nerve
What 5 branches are given off the facial nerve after piercing the parotid gland?
- Temporal
- Zygomatic
- Buccal
- Mandibular
- Cervical
