What does 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.
Where does the vagus nerve innervate the heart?
SA node
The heart is innervated by vagal and sympathetic fibers. The right vagus nerve primarily innervates the SA node, whereas the left vagus innervates the AV node; however, there can be significant overlap in the anatomical distribution.
Does the vagus nerve innervate the heart?
Parasympathetic innervation of the heart is mediated by the vagus nerve. Specifically, the vagus nerve acts to lower the heart rate. The right vagus innervates the sinoatrial node.
What is the function of CN 7?
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.
What are the facial nerve branches?
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 is the innervation of the heart?
The heart is innervated by sympathetic and parasympathetic fibres from the autonomic branch of the peripheral nervous system. The network of nerves supplying the heart is called the cardiac plexus. It receives contributions from the right and left vagus nerves, as well as contributions from the sympathetic trunk.
Does the phrenic nerve innervate the heart?
From its origin in the neck, the nerve travels downward into the chest to pass between the heart and lungs towards the diaphragm….
| Phrenic nerve | |
|---|---|
| Innervates | Diaphragm |
| Identifiers | |
| Latin | nervus phrenicus |
| MeSH | D010791 |
What is fifth cranial nerve?
The trigeminal nerve is the fifth cranial nerve (CN V). Its primary function is to provide sensory and motor innervation to the face. The ophthalmic nerve is responsible for sensory innervation of the face and skull above the palpebral fissure as well as the eye and portions of the nasal cavity.
What is Stylomastoid foramen?
The stylomastoid foramen is a rounded opening at the inferior end of the facial canal. It is located on the inferior surface of the petrous temporal bone, between the base of the styloid process and the mastoid process of the temporal bone.
What are the 5 branches of facial nerve?
What are the facial nerve nuclei?
The facial nerve is comprised of three nuclei:
- The main motor nucleus.
- The parasympathetic nuclei.
- The sensory nucleus.
What is the function of the facial nerve?
The facial nerve (seventh cranial nerve, CN VII, latin: nervus facialis) is a mixed cranial nerve consisting of motor, sensory, and visceromotor fibers. The main functions of the facial nerve include controlling the muscles of facial expression, and providing taste sensations from the anterior part of the tongue.
Which is the seventh paired cranial nerve in the face?
The facial nerve (CN VII) is the seventh paired cranial nerve. In this article, we shall look at the anatomy of the facial nerve – its anatomical course, functions and clinical correlations.
Where does the extratemporal part of the facial nerve go?
The extratemporal part of the facial nerve begins when the facial nerve leaves the cranium through the stylomastoid foramen. As the facial nerve exits, it gives GSA fibers to the pinna of the ear and external auditory meatus and SVE fibers to the posterior belly of digastric, stylohyoid, the superior and inferior auricular, and occipitalis muscles.
Where is the posterior auricular nerve located in the face?
The posterior auricular nerve is a small motor branch of the facial nerve that innervates the auricularis posterior muscle, and the occipital belly of the occipitofrontalis muscle. The digastric branch of the facial nerve innervates the posterior belly of the digastric muscle.