The Facial Nerve Ento Key

Facial Nerve And Muscle Anatomy Ento Key Facial nerve. the facial nerve is the seventh (cn vii) cranial nerve and comprises two roots, a motor root and a smaller mixed sensory, taste and parasympathetic root, known as nervus intermedius, which join together within the temporal bone (ta: nervus facialis or nervus cranialis vii). the facial nerve has a complex and broad range of functions. Within the facial canal, three important events occur: firstly, the two roots fuse to form the facial nerve. the nerve then forms the geniculate ganglion (a ganglion is a collection of nerve cell bodies). lastly, the nerve gives rise to: greater petrosal nerve – parasympathetic fibres to mucous glands and lacrimal gland.

Smile Analysis For Facial Nerve Disorders Ento Key The facial nerve exits the skull via the stylomastoid foramen, after which it gives off the following branches: the posterior auricular nerve is the first extracranial branch to emerge which continues to provide motor innervation to the occipital belly of the occipitofrontalis muscle (occipital branch) and intrinsic auricular muscles (auricular branch). The facial nerve is the seventh cranial nerve. it contains the motor, sensory, and parasympathetic (secretomotor) nerve fibers, which provide innervation to many areas of the head and neck region. the facial nerve is comprised of three nuclei: the main motor nucleus. the parasympathetic nuclei. the sensory nucleus. The facial nerve is the seventh cranial nerve (cn vii). it arises from the brain stem and extends posteriorly to the abducens nerve and anteriorly to the vestibulocochlear nerve. it courses through the facial canal in the temporal bone and exits through the stylomastoid foramen after which it divides into terminal branches at the posterior edge of the parotid gland. the facial nerve provides. 11 facial synkinesis presents following injury to the facial nerve and manifests as involuntary movement during volitional or spontaneous movement. this phenomenon may become clinically apparent 3 to 4 months following facial nerve injury. 12 13 several theories regarding the underlying pathophysiology of synkinesis have been postulated.