Radiation treatments to cause tumor death of a VS can also kill the function of nerves and other components in the surrounding area. The X in the image is pointing is the approximate location where the nerve extends outside of the skull, before branching to the different parts of the face. The facial nerve is composed of a large root that innervates facial muscles and a small root known as the intermediate nerve that contains sensory and autonomic fibres. Therefore, when the nerve is damaged those smaller veins are not supplied with enough blood for circulation which is necessary for muscles in the different areas of the face to move. An overview of what each division supplies is detailed here.
The facial nerve cranial nerve VII is a complex nerve with motor, sensory, and parasympathetic visceromotor fibers. In the remaining seven cases, the facial nerve reconstruction was performed as a secondary procedure after the stabilization of the patient's general condition; the waiting period ranging from a two-week to a four-month interval after the facial paralysis. In addition, we were successful in superimposing the nerve models onto representations of the cadaveric specimen constructed using MicroScribe see figure 6 as well as the actual specimen see figures 7, 8, and 9. Sanders, in Aminoff's Electrodiagnosis in Clinical Neurology Sixth Edition , Facial Muscles Facial nerve responses may be tested by recording from any of several facial muscles. Like all nerves, the facial nerve is made of thousands of individual neurons bundled together with connective tissue and blood vessels.
They move the skin and change facial expression to convey mood. Imaging and biopsies are required for final diagnosis. Very amusing and enjoyable thank you! The submandibular and sublingual salivary glands receive their parasympathetic innervation via the submandibular ganglion. At which point along the course of the facial nerve are the terminal motor branches released? By visiting this site you agree to the foregoing terms and conditions.