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...

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..

Energy pyramid
Freshwater Community Energy Relationships – Producers & Consumers

This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..

human brain structure
The Conscious & Unconscious Nervous System

This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..

Chromosome Mutations
Chromosome Mutations

Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..

Water Cycle
The Water Cycle

The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..

Adaptation Tutorial
Adaptation Tutorial

Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..

Related Articles...

No related articles found

See all Related Topics