Is internal laryngeal nerve sensory or motor?

sensory
The superior laryngeal nerve has two branches: the internal laryngeal nerve pierces the thyrohyoid membrane and is sensory to the mucosa of pharynx and larynx from the level of epiglottis to vocal folds; the external laryngeal nerve is motor to cricothyroid.

What does the external superior laryngeal nerve innervate?

The external branch of the superior laryngeal nerve (EBSLN) innervates the cricothyroid muscle (CTM) to promote lengthening and thinning of the vocal fold, thus increasing voice pitch.

Which of the following is the most important motor nerve of the larynx?

The most significant branch of the vagus nerve within the neck is the superior laryngeal nerve (Lucioni, 2007). The larynx receives innervation from the vagus nerve through the superior and recurrent laryngeal nerves (Figures 27.3 and 27.4; Ellis, 2006).

What happens if the superior laryngeal nerve is damaged?

When the external superior laryngeal nerve is damaged, it results in the paralysis of the cricothyroid muscle, which functions to lengthen, stiffen, and thin the true vocal cord.

What is superior laryngeal nerve paralysis?

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. If no recovery is evident three months after the palsy initially presents, the damage is most likely to be permanent.

What gives rise to superior laryngeal nerve?

The superior laryngeal nerve is a branch of the vagus nerve. It arises from the middle of the inferior ganglion of vagus nerve and in its course receives a branch from the superior cervical ganglion of the sympathetic nervous system.

Where does superior laryngeal nerve come from?

The superior laryngeal nerve arises from the inferior ganglion of the vagus. It descends lateral to the pharynx, at first posterior and then medial to the ICA. At the level of greater horn of hyoid, the superior laryngeal nerve divides into a smaller external laryngeal nerve and a larger internal laryngeal nerve.

What happens when the superior laryngeal nerve is damaged?

Is the superior laryngeal nerve sensory or motor?

As a mixed nerve, the superior laryngeal nerve provides both motor and sensory function to different areas of the throat and mouth that are primarily involved in speech and keeping food and drink out of your airway. The external branch of the nerve is the motor branch.

What nerve innervates the superior larynx?

The superior laryngeal nerve gives off the external branch of the superior laryngeal nerve (EBSLN), which runs medial to the superior pole vessels to innervate the cricothyroid muscle. This motor nerve (i.e., Amelita Galli-Curci nerve) increases tension of the vocal cords, allowing for high notes.

What is the function of recurrent laryngeal nerve?

The recurrent laryngeal nerves provide sensory innervation below the level of the cords and motor innervation of the posterior cricoarytenoid muscles, the only abductors of the vocal cords. The glossopharyngeal or ninth cranial nerve provides sensory innervation to the vallecula (the space anterior to the epiglottis) and the base of the tongue.

What is the difference between internal and external laryngeal nerve?

The internal branch pierces the thyroid membrane, above the superior laryngeal artery. It is sensory to the laryngeal, the back of the tongue, the epiglottis and the vocal cords. A communicating branch unites with the inferior laryngeal nerve. The external laryngeal nerve is a mixed nerve and the smaller of the two.