Quick Answer: What Is The Effect Of Injury Of External Laryngeal Nerve?

What nerve can be damaged during thyroidectomy?

These are the recurrent laryngeal nerve and the external branch of the superior laryngeal nerve.

Damage to a recurrent laryngeal nerve can cause you to lose your voice or become hoarse..

What is the sensory nerve supply to the mucous membrane of the larynx?

The superior laryngeal nerve consists of two branches: the internal laryngeal nerve (sensory), which supplies sensory fibers to the laryngeal mucosa, and the external laryngeal nerve (motor), which innervates the cricothyroid muscle.

What cranial nerve is responsible for both sensory and motor innervation of the larynx?

The vagus nerve is the 10th cranial nerve and is responsible for supplying the entire larynx with its complex innervation through the different nerves and respective branches discussed in this article.

What 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.

Why is the left recurrent laryngeal nerve more vulnerable to damage?

Relationship of the recurrent nerve to the inferior thyroid artery. The nerve often passes anterior, posterior, or through the branches of the inferior thyroid artery. Medial traction of the thyroid lobe often lifts the nerve anteriorly, thereby making it more vulnerable.

What causes recurrent laryngeal nerve paralysis?

In 134 patients with recurrent laryngeal nerve paralysis, the left recurrent nerve was most commonly involved. Malignant neoplasms of the lung and pulmonary tuberculosis were the most frequent causes of the paralysis.

What is the consequence of injury to recurrent laryngeal nerve during thyroid surgery?

Objectives. Vocal cord paresis or paralysis due to iatrogenic injury of the recurrent laryngeal nerve (RLNI) is one of the main problems in thyroid surgery. Although many procedures have been introduced to prevent the nerve injury, still the incidence of recurrent laryngeal nerve palsy varies between 1.5-14%.

Can a damaged larynx be repaired?

In some cases, no treatment may be needed and the nerve may recover on its own. Voice therapy is useful in some cases. If surgery is needed, the goal is to change the position of the paralyzed vocal cord to improve the voice.

Does the vagus nerve innervate the larynx?

The vagus nerve innervates the majority of the muscles associated with the pharynx and larynx. These muscles are responsible for the initiation of swallowing and phonation.

What happens when the recurrent laryngeal nerve is damaged?

Injury to the recurrent laryngeal nerves can result in a weakened voice (hoarseness) or loss of voice (aphonia) and cause problems in the respiratory tract. Injury to the nerve may paralyze the posterior cricoarytenoid muscle on the same side.

What is laryngeal nerve damage?

Laryngeal nerve damage is injury to one or both of the nerves that are attached to the voice box. 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.

Do damaged nerves ever heal?

If a nerve is injured but not cut, your injury is more likely to heal. Injuries in which the nerve has been completely severed are very difficult to treat and recovery may not be possible. Your doctor will determine your treatment based on the extent and cause of your injury and how well the nerve is healing.

Where does the recurrent laryngeal nerve come from?

The recurrent laryngeal nerve (RLN) is derived from the vagus trunk as it enters the thorax. The left RLN curves below and behind the aortic arch at the level of the ligamentum arteriosum. The right RLN loops under the subclavian artery.

What is recurrent laryngeal nerve palsy?

Otorhinolaryngology. Vocal cord paresis, also known as recurrent laryngeal nerve paralysis or vocal fold paralysis, is an injury to one or both recurrent laryngeal nerves (RLNs), which control all muscles of the larynx except for the cricothyroid muscle. The RLN is important for speaking, breathing and swallowing.

What is non recurrent laryngeal nerve?

Introduction. The Non-Recurrent Laryngeal Nerve (NRLN) is a rare variant of the Recurrent Laryngeal Nerve (RLN) that takes an aberrant course, not descending into the thorax as is usual (Fig. 1). It was first reported by Stedman (1823).

Where is the laryngeal nerve?

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.

How do you treat a recurrent laryngeal nerve injury?

The treatment methods include the medicines (neurotrophic medicines, glucocorticoids and vasodilators); ultrashort wave therapy, acupuncture and moxibustion and others; voice training, vocal cord injection and others; reinnervation methods of the unilateral RLN injury (including RLN decompression, end to end …

How is recurrent laryngeal nerve injury diagnosed?

RECURRENT laryngeal nerve injury produces an abductor laryngeal paralysis. The vocal cord assumes a median or paramedian position. Accurate diagnosis can be made only by visualizing the vocal cords while the patient is awake. This requires indirect laryngoscopy preoperatively, and, as soon as possible, postoperatively.