What are the branches of cranial nerve 7?
What are the branches of cranial nerve 7?
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 does the cranial nerve VII supply?
The facial nerve, also known as the seventh cranial nerve, cranial nerve VII, or simply CN VII, is a cranial nerve that emerges from the pons of the brainstem, controls the muscles of facial expression, and functions in the conveyance of taste sensations from the anterior two-thirds of the tongue.
What are the most important branches of the seventh cranial nerve?
This seventh cranial nerve performs motor and sensory functions….What are the facial nerve branches?
- Frontal (temporal): Controls your forehead muscles.
- Zygomatic: Helps you close your eyes.
- Buccal: Allows you to move your nose, blink and raise your upper lip and corners of your mouth to make a smile.
Which cranial nerve has branches?
The trigeminal nerve has three major branches on each side—the opthalmic nerve, maxillary nerve, and mandibular nerve—that converge on the trigeminal ganglion.
Which of the following is a branch of the motor part of the facial nerve VII?
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 |
Is cranial nerve VII sensory or motor?
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 would be the effect of damage to cranial nerve VII?
If there is cranial nerve VII nerve damage, this muscle is paralyzed. Because the branch of the seventh cranial nerve that goes to the stapedius muscle begins very proximally, hyperacusis due to seventh cranial nerve lesions indicates a lesion close to the nerve’s origin in the brainstem rather than more peripheral.
Which is the most branched cranial nerve?
The vagus nerve
The vagus nerve has the highest number of branches. It is the longest cranial nerve. It contains motor and sensory fibres and, because it passes through the neck and thorax to the abdomen, has the widest distribution in the body.
Which of these muscles is innervated by cranial nerve VII?
| Muscles Innervated by Cranial Nerves | |
|---|---|
| Cranial Nerve | Muscle |
| Abducens nerve (CN VI) | Lateral rectus |
| Facial nerve (CN VII) | Muscles of facial expression Posterior belly of digastric muscle Stylohyoid muscle Stapedius muscle |
| Glossopharyngeal nerve (CN IX) | Stylopharyngeus muscle |
What is the easiest way to learn cranial nerves?
What is the easiest way to learn cranial nerves? An easy way to remember cranial nerves is to craft a mnemonic device that helps you remember the cranial nerves in order. One common example is, “Ooh, ooh, ooh to touch and feel very good velvet. Which of the cranial nerves are sensory only? Cranial Nerves.
What do cranial nerves VII IX and X contain?
Cranial nerves V, VII, IX, and X are considered mixed cranial nerves due to the presence of afferent and efferent fibers with both sensory and motor components. Cranial Nerve V is the trigeminal nerve responsible for the general somatic sensory innervation (GSA) of the face through its three main branches, V1, V2, and V3 (ophthalmic, maxillary, and mandibular, respectively).
How to test CN VII?
– Use stimulus tastes in very small quantities – Use a separate swab or dropper for each stimulus taste – Avoid stimulus materials that are contraindicated secondary to food allergies or medical conditions
What nerve is a branch of the VIII cranial 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. The vestibular nerve is primarily responsible for maintaining body balance and eye movements, while the cochlear nerve is responsible for hearing. NCBI Skip to main content