Table of Contents
What is found in the piriform recess?
The term “pyriform,” which means “pear-shaped,” is also sometimes spelled “piriform”. 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.
What nerve is in the piriform recess?
The branches of the internal laryngeal and inferior laryngeal nerves (continuation of recurrent laryngeal) lie deep to the mucous membrane of the piriform recess.
What is the role of the piriform fossa?
Abstract. The piriform fossae are the 2 pear-shaped cavities lateral to the laryngeal vestibule at the lower end of the vocal tract. They act acoustically as side-branches to the main tract, resulting in a spectral zero in the output of the human voice.
What forms the lateral boundary of the piriform recess?
Description. On either side of the laryngeal orifice is a recess, termed the sinus piriformis, which is bounded medially by the aryepiglottic fold, laterally by the thyroid cartilage and hyothyroid membrane.
What is pyriform sinus fistula?
Pyriform sinus fistula (PSF) is a rare congenital entity, originating from the failure obliteration of the third or fourth pharyngeal pouches1,2. Most PSF occurs in older children and presents with repeated neck infection or mass. A few prenatal and neonatal cases have been reported in the English literature3,4,5,6.
What causes pyriform sinus residue?
Reduced laryngeal elevation results in residue in area of laryngeal vestibule because larynx is too low and collects food during swallow. Because larynx is not elevating well, cricopharyngeal region does not open as widely and there is residue in pyriform sinuses.
What happens if 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.
Where is the piriform fossa located?
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 piriformis fossa?
Piriformis fossa [1–5] is an important anatomical landmark described as the entry point for antegrade intramedullary nailing of fracture shaft femur. In orthopedics literature the piriformis fossa [1–4] is considered as synonymous to the insertion of the piriformis muscle.
Why piriform fossa is called Smugglers fossa?
Piriform fossa—THE SMUGGLERS FOSSA :(😐 It is sometimes artificially deepened by smugglers using lead balls to hide precious materials like diamonds.. For this reason piriform fossa is also called as Smugglers fossa The ingested foreign bodies like pins or fish bones are sometimes lodged into the piriform fossa.
Where is the pyriform sinus located?
hypopharynx
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 piriform sinus?
Pyriform sinus refers to the pear-shaped fossa (Latin for “trench”) just lateral to the laryngeal entrance. Its medial surface is the aryepiglottic cord; laterally it is bounded by the thyroid cartilage, and posteriorly by the low posterior pharyngeal wall.
What symptom is noted when the superior 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 is the sinus piriformis recess?
On either side of the laryngeal orifice is a recess, termed the sinus piriformis, which is bounded medially by the aryepiglottic fold, laterally by the thyroid cartilage and hyothyroid membrane. This definition incorporates text from a public domain edition of Gray’s Anatomy (20th U.S.
What is the piriform fossa?
On either side of the laryngeal orifice in humans is a recess, termed the pyriform sinus (also piriform recess, piriform sinus, piriform fossa, or smuggler’s fossa ), which is bounded medially by the aryepiglottic fold, laterally by the thyroid cartilage and thyrohyoid membrane. The fossae are involved in speech.
What is the origin and insertion 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.
What is the relationship between the piriformis and the sciatic nerve?
The relationship between piriformis and the sciatic nerve can also vary. In the vast majority of individuals, the sciatic nerve leaves the bony pelvis via the greater sciatic foramen, below piriformis and divides into tibial nerve and common peroneal nerve distally to piriformis. In some people, the nerve divides proximally.