Pterygoid processes of the sphenoid

Pterygoid processes of the sphenoid

Infobox Bone
Name = PAGENAME
Latin = processus pterygoideus ossis sphenoidalis
GraySubject = 35
GrayPage = 151



Caption = Sphenoid bone, upper surface.



Caption2 = Sphenoid bone, anterior and inferior surfaces.
Width = 300
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DorlandsPre = p_34
DorlandsSuf = 12667598
The pterygoid processes of the sphenoid, one on either side, descend perpendicularly from the regions where the body and great wings unite.

Each process consists of a medial pterygoid plate and a lateral pterygoid plate, the upper parts of which are fused anteriorly; a vertical sulcus, the pterygopalatine groove, descends on the front of the line of fusion.

The plates are separated below by an angular cleft, the pterygoid fissure, the margins of which are rough for articulation with the pyramidal process of the palatine bone.

The two plates diverge behind and enclose between them a V-shaped fossa, the pterygoid fossa, which contains pterygoideus internus and tensor veli palatini.

Above this fossa is a small, oval, shallow depression, the scaphoid fossa, which gives origin to the tensor veli palatini.

The anterior surface of the pterygoid process is broad and triangular near its root, where it forms the posterior wall of the pterygopalatine fossa and presents the anterior orifice of the pterygoid canal.

Etymology

Pterygo- meaning wing or fin, -oid meaning having the form or likeness of, process being a projection from the main body of something. [ [http://www.oed.com/ Oxford English Dictionary: The definitive record of the English language ] ]


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  • Pterygoid — (from the Greek for winglike ) can refer to: * Pterygoid processes of the sphenoid bone ** The Lateral pterygoid plate by it * a muscle such as Lateral pterygoid muscle or Medial pterygoid muscle * a branch of the Mandibular nerve …   Wikipedia

  • Ossification of the sphenoid — Until the seventh or eighth month of fetal life the body of the sphenoid consists of two parts: one in front of the tuberculum sellæ, the presphenoid, with which the small wings are continuous; the other, comprising the sella turcica and dorsum… …   Wikipedia

  • Pterygoid — Pter y*goid, a. [Gr. ?, ?, a wing + oid.] (Anat.) (a) Like a bird s wing in form; as, a pterygoid bone. (b) Of, pertaining to, or in the region of, the pterygoid bones, pterygoid processes, or the whole sphenoid bone. n. A pterygoid bone. [1913… …   The Collaborative International Dictionary of English

  • Pterygoid bone — Pterygoid Pter y*goid, a. [Gr. ?, ?, a wing + oid.] (Anat.) (a) Like a bird s wing in form; as, a pterygoid bone. (b) Of, pertaining to, or in the region of, the pterygoid bones, pterygoid processes, or the whole sphenoid bone. n. A pterygoid… …   The Collaborative International Dictionary of English

  • Pterygoid process — Pterygoid Pter y*goid, a. [Gr. ?, ?, a wing + oid.] (Anat.) (a) Like a bird s wing in form; as, a pterygoid bone. (b) Of, pertaining to, or in the region of, the pterygoid bones, pterygoid processes, or the whole sphenoid bone. n. A pterygoid… …   The Collaborative International Dictionary of English

  • pterygoid process — n a process that extends downward from each side of the sphenoid bone near the union of its body and a greater wing, that consists of the medial and lateral pterygoid plates which are fused above anteriorly and separated below by the pterygoid… …   Medical dictionary

  • Sphenoid bone — Bone: Sphenoid bone Cranial Bones. Only the end of the wing of the sphenoid bone is visible …   Wikipedia

  • pterygoid process — adj. each of a pair of processes from the sphenoid bone in the skull. Etymology: Gk pterux ugos wing …   Useful english dictionary

  • pterygoid process — either of two large processes of the sphenoid bone …   The new mediacal dictionary

  • pterygoid — [ter′i goid΄] adj. 〚< Gr pteryx, gen. pterygos (see PTERYGIUM) + OID〛 1. having the form of a wing; winglike 2. designating, of, or near either of two winglike processes in the skull that descend from the sphenoid bone n …   Universalium

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