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3,000 fibres
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- It is composed of approximately 10,000 neurons which comprise 2 roots: 7,000 myelinated, innervating the muscles of facial expression (motor root). 3,000 fibres, being mixed sensory, taste and parasympathetic root, known as the Nervus Intermedius.
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Oct 30, 2023 · General visceral efferent (GVE) fibers. General visceral efferent fibers in the facial nerve are involved in parasympathetic component of the autonomic nervous system and play an important role in the innervation of the lacrimal gland, nasal and palatine glands as well as the submandibular and sublingual glands.
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May 23, 2023 · 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.
- Sinali O. Seneviratne, Bhupendra C. Patel
- Curtin University, University of Utah
- 2021
- 2023/05/23
21 hours ago · Function. The facial nerve (cranial nerve VII) is a mixed nerve with motor, sensory, and parasympathetic functions. It is responsible for controlling the muscles of facial expression, providing taste sensation to the anterior two-thirds of the tongue, and innervating several glands involved in tear and saliva production.
Jun 23, 2024 · The course of the facial nerve is very complex. There are many branches, which transmit a combination of sensory, motor and parasympathetic fibres. Anatomically, the course of the facial nerve can be divided into two parts: Intracranial – the course of the nerve through the cranial cavity, and the cranium itself.
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The facial nerve is the 7th cranial nerve and carries nerve fibers that control facial movement and expression. The facial nerve also carries nerves that are involved in taste to the anterior 2/3 of the tongue and producing tears (lacrimal gland).
The sensory nerve fibers of your facial nerve play a key role in hearing. They provide innervation to your ear canal, tympanic membrane (eardrum) and outer ear (pinna). They also carry taste sensations from the front (anterior) two-thirds of your tongue .
The parasympathetic fibers that travel in the facial nerve originate in the superior salivatory nucleus. The facial nerve also functions as the efferent limb of the corneal reflex.