What are the boundaries of the Laryngopharynx?

What are the boundaries of the Laryngopharynx?

The laryngopharynx is the lowest third of the interior pharynx and communicates with the larynx through the inlet of the larynx, also known as the aditus. Specifically, its superior border is the epiglottis and oropharynx and its inferior border is the posterior surface of the cricoid cartilage of the larynx.

Where does the hypopharynx end?

The distal end of the hypopharynx culminates in the upper esophageal sphincter. This is a region of the pharynx that controls opening of the proximal esophagus to allow passage of food into the alimentary track and to prevent the inadvertent regurgitation of food or secretions back into the pharynx and upper airway.

What is hypopharynx anatomy?

The laryngopharynx, also referred to as the hypopharynx, is the most caudal portion of the pharynx and is a crucial connection point through which food, water, and air pass. Specifically, it refers to the point at which the pharynx divides anteriorly into the larynx and posteriorly into the esophagus.

Where does the hypopharynx start?

oropharynx
Gross anatomy The hypopharynx begins as the continuation of the oropharynx at the pharyngoepiglottic fold (which is at the level of the hyoid bone) superiorly, and extends inferiorly to the level of the inferior aspect of the cricoid cartilage, where it continues as the cervical esophagus.

What are the boundaries of the oropharynx?

The boundaries of the oropharynx are the lower edge of the soft palate superiorly and the hyoid bone inferiorly. The anterior border is formed by the oropharyngeal inlet and the base of the tongue, and the posterior border is formed by the superior and middle pharyngeal constrictor muscles and their overlying mucosa.

What are the 3 sections of the pharynx?

It contains three sections: the nasopharynx, oropharynx and laryngopharynx, which is also called the hypopharynx.

What is the Postcricoid space?

The postcricoid region is a subsite of the hypopharynx, comprising the anterior wall. The area includes the mucosa, intramural fat, and a rich venous plexus 1-3.

Where are the post Cricoid located?

hypopharynx
Thepostcricoid region is a midline, inferiorly located subsite of the hypopharynx and extends from just below the posterior aspect of the arytenoid cartilages to the esophageal introitus. Postcricoid tumors commonly invade the cricoid cartilage and the posterior cricoarytenoid muscle.

What is the Vallecula?

Vallecula is a term that means depression in something. The epiglottic vallecula consists of a small mucosa-lined depression (vallecula) located at the base of the tongue just between the folds of the throat on either side of the median glossoepiglottic fold.

What is the larynx and hypopharynx?

The larynx is the voice box and helps us speak and also protects the windpipe and lungs during swallowing. The larynx contains the vocal cords. The hypopharynx is the part of the throat (pharynx) that beside and behind the larynx.

Are hypopharynx and oropharynx the same?

The throat (pharynx) is a muscular tube that runs from the back of your nose down into your neck. It contains three sections: the nasopharynx, oropharynx and laryngopharynx, which is also called the hypopharynx.

Is the uvula part of the oropharynx?

The oropharynx is the space in the back of the mouth, sometimes called the back of the throat. The base of the tongue, parts of the tonsil, the back of the soft palate, and the uvula are all located in the oropharynx. The oropharynx is often just called the pharynx.

What are the anatomic boundaries of the hypopharynx?

The anatomic boundaries of the hypopharynx can be conceptualized as the region between the oropharynx and the esophageal introitus (Fig. 13.1). More precisely, the hyoid bone constitutes the superior border of the hypopharynx, which extends inferiorly to the cricoid cartilage at the most inferior aspect.

Does the inferior constrictor contribute to the hypopharynx?

Note that the inferior constrictor is the main contributor to the hypopharynx, and it transitions to the sphincterlike cricopharyngeal muscular zone posterior to the cricoid cartilage. The epithelium of the oropharyngeal and hypopharyngeal mucosa is squamous.

What is the hypopharynx made of?

The hypopharynx comprises the piriform sinuses, the lateral and posterior pharyngeal walls, and the posterior surfaces of the larynx. These structures surround the larynx posteriorly and laterally. Tumors in this region can be difficult to detect because of the recesses and spaces surrounding the larynx.

Where is the inferior portion of the pharynx?

The hypopharynx, the inferior portion of the pharynx, extends from the tip of the epiglottis to the entrance to the esophagus, opposite the third, fourth, fifth, and sixth cervical vertebrae.