Facial Nerve Flashcards
What are the two roots of the facial nerve and where do they arise?
Large motor root
Smaller sensory/parasympathetic root called nervus intermedius
Arise in the pons
What sensory fibres cell bodies are located in the geniculate ganglion?
Taste fibres from chorda tympani (special sensation taste anterior 2/3 of the tongue)
Taste fibres from the soft palate (via greater petrosal nerve)
Cutaneous sensory fibres (from skin of the ear)
What info does chorda tympani carry?
Carries taste from anterior 2/3 of the tongue
Remainder of the parasympathetic fibres to the submandibular ganglion (and then to submandibular and sublingual salivary glands)
What does the auricular branch carry?
Sensory info from some of the skin of the external acoustic meatus and external ear
Where is the stapedius muscle?
Middle ear
Where does the posterior auricular nerve travel to?
Occipital belly of occipitofrontalis
T/F:
Posterior auricular never carries somatic motor and runs inbetween the auricle and mandible
False
Runs between the auricle and mastoid process
What does the temporal branch supply?
occipitofrontalis, orbicularis oculi, corregator superculli
What does the zygomatic branch supply?
orbicularis oculi
What do the buccal branches supply?
o Supplies face between orbicularis oculi and oral fissue- zygomaticus major and minor, proceus, nasalis, levator labii superioris alaque nasi, leavtor labii superioris, levator anguli oris, buccinators, orbicularis oris
What do the marginal mandibular branches supply?
o Muscles of lower lip and chin and risorius (orbicularis oris, mentalis, depressor labii inferioris, depressor anguli oris)
What do the cervical branches supply?
Platysma
At pes anserinus the facial nerve divides into two major branches
What are they?
Superior branch divides into temporal and zygomatic
Inferior divides into buccal, marginal mandibular and cervical
