What are the 5 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.
What are facial nerves composed of?
The facial nerve is composed of approximately 10,000 neurons, 7,000 of which are myelinated and innervate the nerves of facial expression. Three thousand of the nerve fibers are somatosensory and secretomotor and make up the nervus intermedius.
Where is the 7th facial nerve located?
The two 7th Cranial Nerves (CN VII) are located on either side of the brainstem, at the top of the medulla. They are mixed cranial nerves with BOTH sensory and motor function. CN VII controls the face and is mainly FACE MOVEMENT with some face sensation.
Which muscles are innervated by the facial nerve?
The facial nerve passes through the stylomastoid foramen in the skull and terminates into the zygomatic, buccal, mandibular, and cervical branches. These nerves serve the muscles of facial expression, which include the frontalis, orbicularis oculi, orbicularis oris, buccinator, and platysma muscles.
What is the 7th facial nerve?
The facial nerve is the seventh cranial nerve (CN VII). 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 motor branches of the facial nerve?
Facial nerve
| Type | Mixed nerve (motor, sensory, autonomic fibers) |
|---|---|
| Extracranial branches | Posterior auricular nerve, branch to posterior digastric belly, branch to stylohyoid muscle, temporal branch, zygomatic branch, buccal branch, marginal mandibular branch, cervical branch |
How do you remember the branches of the facial nerve?
There are many mnemonics to recall the branches of the facial nerve (superior to inferior) as they exit the anterior border of the parotid gland….Examples include:
- Tall Zulus Bear Many Children.
- Two Zebras Bit My Coccyx.
- Ten Zebras Buggered My Car.
- To Zanzibar By Motor Car.
- Two Zombies Buggered My Cat.
What are the five branches of facial nerve and cite their innervated structures?
Usually, five branches can be identified:
- The temporal branch – innervating the frontalis and orbicularis oculi muscles and the muscles in the upper part of the face.
- The zygomatic branch – innervating the middle part of the face.
- The buccal branch – innervating the cheek muscles, including the buccinator muscle.
How many branches does the maxillary nerve have?
three
The Maxillary Nerve (V2) It then passes through the orbit in the infraorbital canal, exits through the infraorbital foramen, and gives rise to three cutaneous branches: the zygomaticotemporal, zygomaticofacial, and infraorbital nerves.
