FREE subscriptions for doctors and students The important intrapetrous branches of the facial nerve are:. This site is intended for healthcare professionals. Login Register Univadis Login. Home About Testimonials About this resource Authors.
The facial nerve is one of the key cranial nerves with a complex and broad range of functions. Although at first glance it is the motor nerve of facial expression which begins as a trunk and emerges from the parotid gland as five branches see facial nerve branches mnemonic , it has taste and parasympathetic fibers that relay in a complex manner. The facial nerve is the only cranial nerve that may show normal post-contrast enhancement, although this applies only to the labyrinthine segment up to the stylomastoid foramen. Enhancement of the other segments of the facial nerve and other cranial nerves is considered pathologic. Three brainstem nuclei contribute to the facial nerve: one motor, one secretomotor, and one sensory:. The facial nerve has six named segments facial nerve segments mnemonic :. It is joined by the nervus intermedius , which emerges lateral to the main trunk.
NCBI Bookshelf. Dominika Dulak ; Imama A. Authors Dominika Dulak 1 ; Imama A. Naqvi 2. It arises from the brain stem and extends posteriorly to the abducens nerve and anteriorly to the vestibulocochlear nerve.
In this article, we shall look at the anatomical course of the nerve, and the motor, sensory and parasympathetic functions of its terminal branches. The course of the facial nerve is very complex. There are many branches, which transmit a combination of sensory, motor and parasympathetic fibres. The nerve arises in the pons , an area of the brainstem.