What are the 3 branches of the facial nerve?
The labyrinthine segment gives off three branches: the greater superficial petrosal nerve (containing parasympathetic fibers for the lacrimal gland and taste fibers from the palate), the lesser petrosal nerve, and the external petrosal nerve.
What are the Intratemporal branches of facial nerve?
The Extratemporal Part
- 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 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.
Where does the facial nerve Decussate?
The nerve typically travels from the pons through the facial canal in the temporal bone and exits the skull at the stylomastoid foramen. It arises from the brainstem from an area posterior to the cranial nerve VI (abducens nerve) and anterior to cranial nerve VIII (vestibulocochlear nerve).
What are the 5 branches of 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 do the branches of the facial nerve innervate?
Other muscles innervated by branches of the facial nerve are the anterior, superior, and posterior auricular muscles; and the occipitofrontalis muscle. The anterior, superior, and posterior auricular muscles all elevate the ear by pulling it upward.
What is nervus intermedius?
The nervus intermedius, which is the peripheral part of the facial nerve, has visceral motor and special sensory fibers. First described in 1563, the nerve was referred to as “portio media inter comunicantem faciei et nervum auditorium” by Heinrich August Wrisberg in 1777 (1).
What are the branches of facial artery?
The facial artery has a cervical branch that gives rise to four other vessels before continuing its course into the face. The vessels of the cervical branches are the ascending palatine artery, tonsillar branch, submental artery, and glandular branches.
What is nucleus tractus Solitarius?
In the human brainstem, the solitary nucleus, also called nucleus of the solitary tract, nucleus solitarius, and nucleus tractus solitarii, (SN or NTS) is a series of purely sensory nuclei (clusters of nerve cell bodies) forming a vertical column of grey matter embedded in the medulla oblongata.
What is Gasserian ganglion?
The gasserian ganglion is a collection of nerve cell bodies that help provide sensation to the head and face and provide movement to the muscle of mastication (chewing muscles). The gasserian ganglion lies inside the skull on each side of the head. From the ganglion, the trigeminal nerve separates into three branches.
What are the branches of the facial nerve?
Within the parotid gland, the facial nerve terminates by bifurcating into five motor branches. These innervate the muscles of facial expression: Temporal branch – Innervates the frontalis, orbicularis oculi and corrugator supercilii. Zygomatic branch – Innervates the orbicularis oculi.
What nerve innervates the facial expression?
The facial nerve is associated with the derivatives of the second pharyngeal arch. Motor: Innervates the muscles of facial expression, the posterior belly of the digastric, the stylohyoid and the stapedius muscles.
What are the parasympathetic fibres of the facial nerve?
The parasympathetic fibres of the facial nerve are carried by the greater petrosal and chorda tympani branches. The greater petrosal nerve arises immediately distal to the geniculate ganglion within the facial canal. It then moves in anteromedial direction, exiting the temporal bone into the middle cranial fossa.