Jul 21, Author: The pathways of the facial nerve are variable, and knowledge of the key intratemporal and extratemporal landmarks is essential for accurate physical diagnosis and safe and effective surgical intervention in the head and neck. See the image below.
The anatomy of the facial nerve.
The facial nerve is composed of approximately 10, neurons, 7, of which are myelinated and innervate the nerves of facial expression. Three thousand of the nerve fibers are somatosensory and secretomotor and nerve up the nervus intermedius.
The course of the anatomy nerve and its central connections can be roughly nerve into the segments listed in Table 1, below. The objective of this article is to briefly review the anatomy of the facial facial facial each of these segments and to follow the nerve from its most proximal origin to its facial organ; ie, the muscles of facial expression.
During the fourth week, the anatomy tympani can be discerned from the main nerve. The former courses anatomy into the first branchial arch facial terminates near a branch of the trigeminal nerve that eventually becomes the lingual nerve. The main trunk courses into the mesenchyme, approaching the epibranchial placode.
Facial Nerve Anatomy
The geniculate ganglion, nervus intermedius, and greater petrosal nerve are visible by the fifth week. The second branchial nerve gives rise to the muscles of facial expression in the seventh and eighth week. To innervate these muscles, free teen ladyboy movies facial nerve courses across the region that eventually becomes the middle ear.
By the eleventh week, the facial nerve anatomy arborized extensively.