Dictionary > Superior pharyngeal constrictor

Superior pharyngeal constrictor

Definition
noun
(anatomy) The quadrilateral muscle in the pharynx, located superior to other pharyngeal constrictor muscles, arises from the pterygomandibular raphe, and inserts into the median raphe
Supplement
The superior pharyngeal constrictor is one of the three constrictor muscles of the pharynx. The other pharyngeal constrictors are the middle pharyngeal constrictor and the inferior pharyngeal constrictor. Morphoanatomically, the superior pharyngeal constrictor is relatively thin and pale. It is located above the other two pharyngeal constrictors, forming a tube beginning at the pterygomandibular raphe. 1
The superior pharyngeal constrictor is composed of four parts according to origin (pterygomandibular raphe), i.e. the pterygopharyngeal part, the buccopharyngeal part, the myolopharyngeal part, and the glossopharyngeal part. 2 It is inserted into the median raphe of pharyngeal aponeurosis. It is innervated by the IX accessory nerve and X vagus via the pharengeal plexus. Its function is to pull the pharyngeal wall forward and to constrict the pharyngeal diameter.1 As a pharyngeal constrictor muscle, it assists in the swallowing of food (bolus), conveying it downward into the esophagus.
See also:

  • inferior pharyngeal constrictor
  • middle pharyngeal constrictor
  • pharyngeal constrictor

Reference(s):

1 Seikel, J. A., King, D. W., & Drumright, D. G. (2010). Anatomy & physiology for speech, language, and hearing (4th ed.). Clifton Park, NY: Delmar Cengage Learning.

2 Kulkarni, N. V. (2006). Clinical anatomy for students: problem solving approach. New Delhi: Jaypee Bros. Medical Publishers.


You will also like...

Cell structure
Cell Structure

A typical eukaryotic cell is comprised of cytoplasm with different organelles, such as nucleus, endoplasmic reticulum, G..

Homo Species
The Homo Species

The evolution of the species of the genus "Homo" led to the emergence of modern humans. Find out more about human evolut..

Structural depiction of catalase, an enzyme
Protein Activity and Cellular Metabolism

Proteins have a crucial role in various biological activities. Get to know how proteins are able to perform as enzymes, ..

Flowers and tiny fruits of the pomegranate plant
Fruits, Flowers, and Seeds

This tutorial deals with the structure and function of flowers, fruits, and seeds. Also included here are the types of f..

Adaptive Radiation
Adaptive Radiation

The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..

Kidneys
Kidneys and Regulation of Water and Inorganic Ions

The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..

Related Articles...

No related articles found

See all Related Topics