What muscles does the superior laryngeal nerve innervate?
The superior laryngeal nerve, a branch of the vagus nerve, innervates the cricothyroid muscle of the larynx. This muscle stretches, tenses, and adducts the vocal cord. Superior laryngeal neuralgia usually appears as a postsurgical complication.
What muscles does the external laryngeal nerve innervate?
The external laryngeal nerve runs lateral to the larynx deep to the sternothyroid muscle and innervates the cricothyroid and superior pharyngeal muscles.
What structure is pierced by the more superior branch of the superior laryngeal nerve in the anterior aspect of the neck?
The external branch of the superior laryngeal nerve is immediately deep to the superior thyroid artery and descends on the larynx. The internal branch of the superior laryngeal pierces through the thyrohyoid membrane along with the superior laryngeal artery (a division of the superior thyroid artery).
What does the superior laryngeal nerve control?
The superior laryngeal nerve innervates the two cricothyroid muscles. The recurrent laryngeal nerve gets its name from the fact that it loops below the aorta on its way to the intrinsic muscles of the larynx….
|Superior laryngeal nerve|
|Latin||nervus laryngeus superior|
What happens if external laryngeal nerve is damaged?
Damage to the laryngeal nerve can result in loss of voice or obstruction to breathing. Laryngeal nerve damage can be caused by injury, tumors, surgery, or infection. Damage to the nerves of the larynx can cause hoarseness, difficulty in swallowing or breathing, or the loss of voice.
What nerve basically carries out sensory function of a larynx?
The inferior laryngeal nerve (RLN) runs in the tracheoesophageal groove toward the larynx, close to the posterior aspect of the thyroid. It is the main motor nerve of the intrinsic laryngeal muscles, and also provides sensory innervation to the larynx.
Where is the ramus internus located in the larynx?
The internal branch (ramus internus) descends to the hyothyroid membrane, pierces it in company with the superior laryngeal artery, and is distributed to the mucous membrane of the larynx.
Which is the only muscle innervated by the superior laryngeal nerve?
First, it’s the only laryngeal muscle innervated by the superior laryngeal nerve; the rest are served by the recurrent laryngeal nerve. Second, it’s the only tensor muscle of the larynx that plays a role in making vocal sounds.
How does the superior laryngeal nerve affect the voice?
The vocal fold itself receives dual innervation from both nerves. The superior laryngeal nerve innervates the two cricothyroid muscles. A superior laryngeal nerve palsy changes the pitch of the voice and causes an inability to make explosive sounds due to paralysis of the cricothyroid muscle.
How does the recurrent laryngeal nerve get its name?
The recurrent laryngeal nerve gets its name from the fact that it loops below the aorta on its way to the intrinsic muscles of the larynx. The left recurrent laryngeal nerve passes under and around the aorta on its way to the larynx, whereas the right recurrent laryngeal nerve passes under and around the subclavian artery.