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The facial motor nucleus is a collection of neurons in the brainstem that belong to the facial nerve (cranial nerve VII). [1] These lower motor neurons innervate the ...
The motor part of the facial nerve arises from the facial nerve nucleus in the pons, while the sensory and parasympathetic parts of the facial nerve arise from the intermediate nerve. From the brain stem, the motor and sensory parts of the facial nerve join and traverse the posterior cranial fossa before entering the petrous temporal bone via ...
The facial motor nucleus contains ventral and dorsal areas that have lower motor neurons that supply the upper and lower face muscles. When central facial palsy occurs, there are lesions in the corticobulbar tract between the cerebral cortex. Because of these lesions, the facial motor nucleus reduces or destroys input in the ventral division. [1]
The superior salivatory nucleus (or nucleus salivatorius superior) is a visceral motor cranial nerve nucleus of the facial nerve (CN VII). It is located in the pontine tegmentum. [citation needed] It projects pre-ganglionic visceral motor parasympathetic efferents (via CN VII) to the pterygopalatine ganglion, and submandibular ganglion. [4]
The accessory facial motor nucleus is a small cluster of neurons dorsal to the facial motor nucleus in the pontine tegmentum. It has been reported for the human , [ 1 ] rat , [ 2 ] and mouse . [ 3 ]
A cranial nerve nucleus is a collection of neurons (gray matter) in the brain stem that is associated with one or more of the cranial nerves. Axons carrying information to and from the cranial nerves form a synapse first at these nuclei .
The nervus intermedius exits the cranial cavity at the internal auditory meatus, and joins with the motor root of the facial nerve at the geniculate ganglion. While preganglionic parasympathetic fibres pass through the geniculate ganglion, they neither synapse, nor have their cell bodies located there. [citation needed]
The facial motor nucleus serve motor control of the muscles of facial expression and the stapedius muscle of the ear, while the superior salivary nucleus controls the secretion of saliva and tears through parasympathetic innervation of structures including the lacrimal gland and the mucosal glands of the nose, palate, and pharynx.