PTERYGOID FISSURE Meaning and
Definition
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The pterygoid fissure is a term used in anatomy to describe a narrow, elongated opening located in the skull of vertebrates. It is commonly found in mammals, including humans. The pterygoid fissure is situated on the inner aspect of the sphenoid bone, a bone located at the base of the skull.
This fissure plays a crucial role in facilitating the passage of important anatomical structures. It serves as a pathway for the transmission of several important nerves and blood vessels. The maxillary nerve, which is a major branch of the trigeminal nerve responsible for sensation in the face, passes through the pterygoid fissure. In addition, the pterygoid venous plexus, a network of veins responsible for draining blood from the muscles of mastication, also traverses this fissure.
The pterygoid fissure is typically described as being bounded by multiple bony structures. Its superior and inferior boundaries are formed by the greater and lesser wings of the sphenoid bone, respectively. The pterygoid process of the sphenoid bone and the maxilla contribute to its lateral wall, while medially, its borders are demarcated by the perpendicular plate of the palatine bone. These boundaries ensure the integrity of the fissure while allowing structures to pass through it.
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A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for PTERYGOID FISSURE
Etymology of PTERYGOID FISSURE
The word "pterygoid fissure" can be broken down into two parts:
1. "Pterygoid" - This term is derived from the Greek word "pteryx", which means wing. It is commonly used in anatomy to refer to structures that resemble wings. In this context, "pterygoid" is used to describe the shape or location of a particular anatomical feature.
2. "Fissure" - This term comes from the Latin word "fissura", which means a narrow opening or cleft. It is used in anatomy to describe a long, narrow, or deep opening or groove.
Therefore, the term "pterygoid fissure" refers to a narrow opening or groove in the anatomy that is similar to a wing-like structure.
