The general visceral afferent GVA component is very small. While a diagnosis can usually be made based on clinical features, further investigation is often warranted to determine the specific etiology, which should determine the course of treatment. The efferent limb is mediated by the facial nerve and produces bilateral eye blink. Supplies branchiomotor innervation to most laryngeal and pharyngeal muscles; provides parasympathetic fibers to nearly all thoracic and abdominal viscera down to the splenic flexure; and receives the special sense of taste from the epiglottis. During a clinical examination, horizontal eye movements strabismus or an absent pupillary light reflex PLR may indicate a problem.
The facial nerve exits the brain stem from its venterolateral surface at the cerebellopontine angle. In the central paralysis loss of the upper motor neuron the patient will present clinically with paralysis of the contra lateral muscle of the facial expression in the lower half of the face, the contra lateral forehead and extra-ocular muscles remain functional. Lingual nerve in relation to the lingual plate and third molar. CN VII pre-ganglionic fibers synapse in the submandibular ganglion suspended from the lingual nerve V3. The afferent limb of this reflex is mediated by the trigeminal nerve, and the efferent limb is mediated by the facial nerve.
Authors Dominika Dulak 1 ; Imama A. These innervate the muscles of facial expression:. There are many branches, which transmit a combination of sensory, motor and parasympathetic fibres. There is no established evidence for use of antiviral agents. Its fibers travel with the lingual nerve and the chorda tympani. The facial nerve has a wide range of functions.
The general visceral afferent GVA component is very small. See picture 4 Pathway for voluntary movement of facial expression's muscles. We welcome suggested improvements to any of our articles. Other findings reported on the medical literature are analyzed. Please try again later.