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 ponsan area of the brainstem.
It begins as two roots; a large motor facialand a small sensory root the part of the facial nerve that arises from the sensory root is sometimes known as the nerve nerve. Here, they are in very close proximity to the inner ear.
Easy Notes On 【Facial Nerve】Learn in Just 4 Minutes!
Still within the temporal bone, the roots leave the internal acoustic meatus, and enter into the facial canal. Within the facial canal, three important events occur:.
The facial nerve then exits the facial canal and the cranium via the stylomastoid foramen. This is an exit located just posterior to the styloid process of the temporal bone. After exiting the skull, the facial facial turns superiorly to run just anterior to the outer black nerve on video. It provides motor innervation to the some anatomy the muscles around the ear.
Immediately distal to this, motor branches are sent to the posterior belly anatomy the digastric muscle anatomy to the stylohyoid muscle.