What is the function of the piriform recess?
A deep depression in the wall of the laryngeal pharynx lying lateral to the orifice of the larynx. It is bounded laterally by the thyroid cartilage and medially by the cricoid and arytenoid cartilages. It is a common site for lodgment of foreign objects.
What is the piriform sinus?
The pyriform sinus (also spelled piriform sinus and also known as the pyriform recess, pyriform fossa, and smuggler’s fossa) is the pear-shaped subsite of the hypopharynx located posterolaterally to either side of the laryngeal opening.
What is the role of the piriform fossa?
The piriform fossa forms the bottom part of the pharynx and acts as a pair of side branches of the vocal tract.
What does the internal laryngeal nerve do?
The internal laryngeal nerve supplies sensation to the mucosa from the epiglottis to just above the level of the vocal folds. (The recurrent laryngeal nerve supplies sensation from the rest of the larynx below the level of the vocal folds). It pierces the thyrohyoid membrane above the superior laryngeal artery.
What causes residue in pyriform sinus?
Dejaeger et al. [1] identified both pharyngeal constriction and pharyngeal shortening as factors relevant for the accumulation of pyriform sinus residue, and also implicated tongue driving force as a factor contributing to vallecular residue.
What is the function of the laryngeal skeleton?
Laryngeal Skeleton These are connected by ligaments and moved by numerous muscles. The movements of the laryngeal skeleton open and close the glottis and regulate the degree of tension in the vocal folds. When air passes through the folds, they produce sound. Tension levels control pitch and volume.
What nerve is in the piriform recess?
Deep to the mucous membrane of the pyriform fossa lie the recurrent laryngeal nerve as well as the internal laryngeal nerve, a branch of the superior laryngeal nerve. The internal laryngeal nerve supplies sensation to the area, and it may become damaged if the mucous membrane is inadvertently punctured.
What happens if the internal laryngeal nerve is damaged?
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.
What is the meaning of piriform recess?
Medical Definition of piriform recess : a small cavity or pocket between the lateral walls of the pharynx on each side and the upper part of the larynx — called also piriform fossa, piriform sinus Learn More about piriform recess
What is piriform sinus fossae?
Piriform sinus is a recess on either sides of the laryngeal orifice. It is bounded medially by the aryepiglottic fold, laterally by the thyroid cartilage and thyrohyoid membrane. The fossae are involved in speech.
What are the advantages of the piriformis fossa?
The major advantage of the piriformis fossa compared to the greater trochanter or retrograde intercondylar starting points are its colinear axis with the shaft of the femur and its extraarticular location, respectively. Because it is colinear with the long axis of femur, the piriformis fossa is optimal for obtaining satisfactory fracture reduction.
What are the characteristics of piriformis muscle?
Piriformis muscle 1 Origin and insertion. This is a flat pyramid-shaped muscle that arises from the anterior surface of the sacrum, between the sacral foramina. 2 Innervation. The nerve supply to piriformis comes from the nerve to piriformis, formed from the anterior rami of S1 and S2 spinal nerves. 3 Blood supply. 4 Functions.