What do the branches of the facial nerve innervate?
The facial nerve provides motor innervation of facial muscles that are responsible for facial expression, parasympathetic innervation of the glands of the oral cavity and the lacrimal gland, and sensory innervation of the anterior two-thirds of the tongue.
What are the five branches of the facial nerve?
The facial nerve has five main branches, although the anatomy can vary somewhat between individuals. The branches are, from top to bottom: frontal (or temporal), zygomatic, buccal, marginal mandibular, and cervical. Each of these branches provides input to a group of muscles of facial expression.
Which cranial nerve has 3 branches that innervate the face?
The trigeminal ganglion splits into three trigeminal nerve branches. These branches travel along each side of your head to different parts of your face.
What do the branches of the trigeminal nerve innervate?
The only branch of the trigeminal nerve that has a motor component in the mandibular nerve (V3). This branch supplies motor innervation to the facial muscles involved in mastication which include the masseter, temporalis muscle, and the lateral and medial pterygoids.
What is the function of Abducens nerve?
The abducens nerve functions to innervate the ipsilateral lateral rectus muscle and partially innervate the contralateral medial rectus muscle (at the level of the nucleus – via the medial longitudinal fasciculus).
How many nuclei does facial nerve have?
The facial nerve is comprised of three nuclei: The main motor nucleus. The parasympathetic nuclei. The sensory nucleus.
What does the abducens nerve innervate?
What are the 3 branches of the trigeminal nerve?
The semilunar (gasserian or trigeminal) ganglion is the great sensory ganglion of CN V. It contains the sensory cell bodies of the 3 branches of the trigeminal nerve (the ophthalmic, mandibular, and maxillary divisions). The ophthalmic and maxillary nerves are purely sensory.
What does the hypoglossal innervate?
The hypoglossal nerve innervates all the intrinsic muscles and all but one of the extrinsic muscles (genioglossus, styloglossus, and hyoglossus) of the tongue. The function of each muscle/muscle group is as follows: Genioglossus- Draw the tongue forward from the root.
What muscles are innervated by facial nerve?
– Extraocular muscles innervated by CN III are superior rectus (SR) infecrior rectus (IR) medial rectus (MR) inferior oblique (IO) – Levator palpebrae superioris – Ciliary muscle – Sphincter pupillae
Does the facial nerve innervate the skin of the face?
There are close functional and anatomical relationships between cranial nerves V and VII in both their sensory and motor divisions. Sensation on the face is innervated by the trigeminal nerves (V) as are the muscles of mastication, but the muscles of facial expression are innervated mainly by the facial nerve (VII) as is the sensation of taste.
What is the function of facial nerves?
The main function of the facial nerve is motor control of all of the muscles of facial expression. It also innervates the posterior belly of the digastric muscle, the stylohyoid muscle, and the stapedius muscle of the middle ear. All of these muscles are striated muscles of branchiomeric origin developing from the 2nd pharyngeal arch.
What are symptoms of facial nerve damage?
facial paralysis on one side (rarely are both sides of the face affected)