What are the 12 pairs of cranial nerves and their functions?

What are the 12 pairs of cranial nerves and their functions?

This article will explore the functions of the cranial nerves and provide a diagram.

• Diagram.
• I. Olfactory nerve. The olfactory nerve transmits information to the brain regarding a person’s sense of smell.
• II. Optic nerve.
• III. Oculomotor nerve.
• IV. Trochlear nerve.
• V. Trigeminal nerve.
• VI. Abducens nerve.
• VII. Facial nerve.

What are the 12 cranial nerves in order?

The twelve cranial nerves, in order from I to XII are: olfactory nerve, optic nerve, oculomotor nerve, trochlear nerve, trigeminal nerve, abducens nerve, facial nerve, vestibulocochlear nerve, glossopharengeal nerve, vagus nerve, spinal accessory nerve, and hypoglossal nerve.

What are the 12 cranial nerves and functions quizlet?

Terms in this set (12)

• Olfactory. sensory; sense of smell.
• Optic. sensory; sense of sight.
• Oculomotor. motor; eye movement.
• Trochlear. motor; eye movement.
• Trigeminal. sensory and motor; sensory impulses in the skin, jaw movement.
• Abducens. motor; eye movement.
• Facial.
• Vestibulocochlear.

Which cranial nerve is the largest?

vagus nerve

What is the mnemonic for cranial nerves?

Mnemonics

• O: olfactory nerve (CN I)
• O: optic nerve (CN II)
• O: oculomotor nerve (CN III)
• T: trochlear nerve (CN IV)
• T: trigeminal nerve(CN V)
• A: abducens nerve (CN VI)
• F: facial nerve (CN VII)
• A: auditory (or vestibulocochlear) nerve (CN VIII)

How do you test for the 12 cranial nerves?

The 12th (hypoglossal) cranial nerve is evaluated by asking the patient to extend the tongue and inspecting it for atrophy, fasciculations, and weakness (deviation is toward the side of a lesion).

How do you test each cranial nerve?

Light touch is tested in each of the three divisions of the trigeminal nerve and on each side of the face using a cotton wisp or tissue paper. The ophthalmic division is tested by touching the forehead, the maxillary division is tested by touching the cheeks, and the mandibular division is tested by touching the chin.

How is cranial nerve 9 and 10 tested?

The motor division of CN 9 & 10 is tested by having the patient say “ah” or “kah”. The palate should rise symmetrically and there should be little nasal air escape. With unilateral weakness the uvula will deviate toward the normal side because that side of the palate is pulled up higher.

How do you test cranial nerve 4?

Trochlear nerve (CN IV) Cranial nerve IV acts as a pulley to move the eyes down—toward the tip of the nose. To assess the trochlear nerve, instruct the patient to follow your finger while you move it down toward his nose.

What is the fourth cranial nerve?

The fourth cranial nerve controls the actions of one of the external eye muscles, the superior oblique muscle. This muscle runs from the back of the eye socket to the top of the eye. Other names for it are superior oblique palsy and trochlear nerve palsy.

Which is the shortest cranial nerve?

trochlear nerve

How do you examine facial nerves?

Ask the patient to look up or wrinkle the forehead; inspect for asymmetry. Ask him or her to close the eyes tightly. Look for incomplete closure or incomplete “burying” of the eyelashes on the affected side. Observe the nasolabial folds and mouth while the patient is concentrating on the eyes.

How do doctors test facial nerves?

Doctors use an MRI to examine the entire facial nerve. This imaging test also allows a doctor to identify swelling or a growth on or near the nerve. Your doctor may recommend a type of MRI that uses a contrast agent, or dye, called gadolinium.

What is 7th nerve?

The facial nerve (the labyrinthine segment) is the seventh cranial nerve, or simply CN VII. It 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.

How do you relax facial nerves?

Here are some face exercises that can relieve facial tension:

1. Happy face. Smile as wide as you can, hold for the count of 5 and then relax.
2. Slack jaw. Let your jaw fully relax and your mouth hang open.
3. Brow furrow. Wrinkle your forehead by arching your eyebrows as high as possible.
4. Eye squeeze.
5. Nose scrunch.

What can I take for nerve inflammation?

Nerve pain medications

• Tricyclic antidepressants, such as amitriptyline (Elavil), doxepin (Sinequan), and nortriptyline (Pamelor).
• Serotonin–norepinephrine reuptake inhibitors (SNRIs), such as duloxetine (Cymbalta) and venlafaxine (Effexor).

Can facial nerves heal?

Sensory nerves can be accessed by various routes, all of which leave minimal scarring. Peripheral nerves have potential for self-repair, but it is a slow process that may take 3-4 months or longer. Minor and superficial nerve injuries will often heal themselves.

What vitamins are good for nerve repair?

B vitamins are useful in treating neuropathy since they support healthy nervous system function. Peripheral neuropathy is sometimes caused by a vitamin B deficiency. Supplementation should include vitamin B-1 (thiamine and benfotiamine), B-6, and B-12. You may choose to take these separately instead of as a B complex.

How do you know if you have nerve damage in your face?

Symptoms. Facial nerve disorders can cause weakness on one or both sides of your face. You might lose your facial expressions, and find it difficult to eat, drink and speak clearly. It can also become difficult to close your eye and blink, which can lead to damage to your cornea.

Can an MRI show nerve damage in face?

Enhancement of the facial and trigeminal nerves and spinal trigeminal tract can be detected on MRI. However, MRI is not usually indicated in the evaluation of this disorder, as the diagnosis is typically clear from the clinical presentation.

What happens if the trigeminal nerve is damaged?

Trigeminal nerve injuries not only causes significant neurosensory deficits and facial pain, but can cause significant comorbidities due to changes in eating habits from muscular denervation of masticator muscles or altered sensation of the oral mucosa.

How do I brush my teeth with trigeminal neuralgia?

Avoid tartar-control toothpaste, which can irritate the gums. Dr. Gremillion also recommended using super soft toothbrushes. Some members have also found using a toothpaste designed for sensitive teeth has enabled them to brush their teeth without their TN flaring up.