"labyrinthine artery: a branch of the anterior inferior cerebellar artery (AICA), supplies the meatal segment. It is supplemented by direct twigs in the cisternal portion, directly from the AICA."
"neoplasm(s) and masses"
"The facial nerve is the seventh (CN VII) cranial nerve and comprises two roots, a motor root and a smaller mixed sensory, taste and parasympathetic root, known as nervus intermedius, which join together within the temporal bone (TA: nervus facialis or nervus cranialis VII)."
"Arnold's nerve (auricular branch of the vagus nerve): pain fibres to the posterior part of the external acoustic meatus hitchhike from the jugular foramen"
"Bell palsy"
"temporal (do not confuse with deep temporal nerves of the mandibular division of trigeminal nerve)"
Expected headings
"Terminology"
"Nuclei and brainstem tracts"
"General course"
"Intracranial (cisternal) segment"
"Meatal (canalicular) segment"
"Labyrinthine segment"
"Tympanic segment"
"Mastoid segment"
"Extratemporal segment"
"Function"
"Motor"
"Taste"
"Parasympathetic"
"Somatosensory"
"Bilateral conditions"
"Unilateral conditions"
"The facial nerve is the seventh (CN VII) cranial nerve and comprises two roots, a motor root and a smaller mixed sensory, taste and parasympathetic root, known as nervus intermedius, which join together within the temporal bone (TA: nervus facialis or nervus cranialis VII)."
"The facial nerve emerges from the lower lateral pons, lateral and rostral to the abducens nerve, and medial and caudal to the vestibulocochlear nerve (CN VIII) 9. Nervus intermedius emerges immediately lateral to the main trunk and the two travel laterally through the cerebellopontine angle cistern to the internal acoustic meatus. The intracranial segment has no branches."
"The labyrinthine, tympanic and mastoid segments can be seen on high-resolution T1 or T2 weighted images, however, dedicated neurographic sequences are required to visualise the extracranial branches."
"Simiar to the trigeminal nerve, the facial nerve has sensory and motor roots that travel together to the skull where they join at a ganglion. However, unlike the trigeminal nerve, the sensory/parasympathetic root of the facial nerve has a special name; nervus intermedius although it is often forgotten. When the term facial nerve is used without qualification, it generally refers to both the motor root and the adjacent nervus intermedius."
"As the facial nerve and nervus intermedius pass through the anterior superior quadrant of the internal acoustic meatus they enters the Fallopian canal, passing anterolaterally between and superior to the cochlea (anterior) and vestibule (posterior), and then bending posteriorly (the anterior or first genu) at the geniculate ganglion (where the nervus intermedius joins the facial nerve). It is here that two branches originate:"
"The temporal branch runs with the superficial musculoaponeurotic system (SMAS) over the zygomatic arch. This branch is at risk during surgery in this region. To avoid damage, procedures should be deep to the SMAS (e.g. zygomatic fracture repairs)."