What are the five branches of facial nerve and cite their innervated structures?

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 the structures innervated by the branches of facial nerve?

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 5 muscles of facial expression?

  • Frontalis.
  • Corrugator supercilii.
  • Nasalis.
  • Procerus.
  • Orbicularis oris.
  • Buccinator.
  • Depressor anguli oris.
  • Levator anguli oris.
  • What are facial muscles innervated by?

    The muscles of facial expression are innervated by the facial nerve (cranial nerve VII), and the muscles of mastication are innervated by the mandibular division of the trigeminal nerve (cranial nerve V3).

    What does the temporal branch of the facial nerve innervate?

    The temporal branch is the superior branch of the facial nerve. The nerve provides motor innervation to the frontalis muscle, corrugators, procerus and occasionally portions of the orbicularis oculi.

    What muscles of facial expression is not innervated by the facial nerve?

    The facial nerve then passes through the parotid gland, which it does not innervate, to form the parotid plexus, which splits into five branches (temporal, zygomatic, buccal, marginal mandibular, and cervical) innervating the muscles of facial expression.

    What nerve innervates muscles of mastication?

    the mandibular nerve

    It is well known that the masticatory muscles are composed of four main muscles, and all four are innervated by the branches of only one of the cranial nerves, the mandibular nerve.

    What is the frontal branch of the facial nerve?

    The frontal branch itself is the superior branch of the frontozygomatic trunk of the facial nerve as it exits the stylomastoid foramen. The nerve is deep to the tissues in the preauricular region, passes through the superior edge of the parotid gland, and transitions into a more superficial layer.

    Is the Mentalis innervated by the facial nerve?

    The facial nerve innervates all of the muscles of facial expression. Of these, the facial nerve innervates 14 of the 17 paired muscle groups of the face on their deep side. The three muscles innervated on their superficial or lateral edges are the buccinator, levator anguli oris, and mentalis muscles.

    What is a function of cranial nerve Five?

    The trigeminal nerve is the fifth cranial nerve (CN V). Its primary function is to provide sensory and motor innervation to the face. The trigeminal nerve consists of three branches on either side that extend to different territories of the face.

    How many branches does the facial nerve have?

    five

    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.

    Where is the cranial nerve 5?

    Each trigeminal ganglion is located near your temple at the side of your head, in front of your ear. The trigeminal ganglion splits into three trigeminal nerve branches.

    What are the three branches of the fifth cranial nerve?

    It contains the sensory cell bodies of the 3 branches of the trigeminal nerve (the ophthalmic, mandibular, and maxillary divisions).

    What are the three branches of trigeminal nerve and cite their innervated structures?

    Trigeminal Nerve. The trigeminal nerve as the name indicates is composed of three large branches. They are the ophthalmic (V1, sensory), maxillary (V2, sensory) and mandibular (V3, motor and sensory) branches. The large sensory root and smaller motor root leave the brainstem at the midlateral surface of pons.

    What are the branches of maxillary nerve?

    Branches

    • Zygomatic nerve (zygomaticotemporal nerve, zygomaticofacial nerve), through the Inferior orbital fissure.
    • Nasopalatine nerve, through the sphenopalatine foramen.
    • Posterior superior alveolar nerve.
    • Greater and lesser palatine nerves.
    • Pharyngeal nerve.

    Is cranial nerve 5 sensory or motor?

    The 5th and largest cranial nerve. The trigeminal nerve is a mixed motor and sensory nerve. The larger sensory part forms the ophthalmic, mandibular, and maxillary nerves which carry afferents sensitive to external or internal stimuli from the skin, muscles, and joints of the face and mouth and from the teeth.

    Where does the abducens nerve innervate?

    ipsilateral lateral rectus muscle

    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).

    Is facial sensory or motor?

    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.

    What branch of the facial nerve extends to the upper part of the cheek?

    Zygomatic Nerve – affects the muscle of the upper part of the cheek. and extends to the muscles of the neck.

    What are buccal branches?

    The buccal branches of the facial nerve (infraorbital branches), are of larger size than the rest of the branches, pass horizontally forward to be distributed below the orbit and around the mouth.

    Where is the buccal branches of facial nerve?

    Buccal Nerve

    The buccal branches of the facial nerve run horizontally to pass below the orbit and around the mouth. The buccal nerve has a superficial and deep branch. The superficial branch passes sandwiched between the skin and the superficial muscles of the face.

    Where is 7th cranial nerve?

    A nerve that runs from the brainstem, through openings in the skull, to the face and tongue. The seventh cranial nerve sends information between the brain and the muscles used in facial expression (such as smiling and frowning), some muscles in the jaw, and the muscles of a small bone in the middle ear.

    What is the 8th nerve?

    The vestibulocochlear nerve, also known as cranial nerve eight (CN VIII), consists of the vestibular and cochlear nerves. Each nerve has distinct nuclei within the brainstem.

    What are the branches of facial artery?

    On the face, four main vessels arise from the trunk of the facial artery: the inferior labial artery, superior labial artery, lateral nasal branch (to the nasalis), and the angular artery. [4] The angular artery is the terminal segment of the facial artery.