Bone plates projecting from the sphenoid bone of the skull
Pterygoid processes of the sphenoid
Sphenoid bone, upper surface.
Sphenoid bone, anterior and inferior surfaces.
Details
Identifiers
Latin
processus pterygoideus ossis sphenoidalis
TA98
A02.1.05.042
TA2
628
FMA
54682
Anatomical terms of bone
[edit on Wikidata]
The pterygoid processes of the sphenoid (from Greek pteryx, pterygos, "wing"), one on either side, descend perpendicularly from the regions where the body and the greater wings of the sphenoid bone unite.
Each process consists of a medial pterygoid plate and a lateral pterygoid plate, the latter of which serve as the origins of the medial and lateral pterygoid muscles. The medial pterygoid, along with the masseter allows the jaw to move in a vertical direction as it contracts and relaxes. The lateral pterygoid allows the jaw to move in a horizontal direction during mastication (chewing). Fracture of either plate are used in clinical medicine to distinguish the Le Fort fracture classification for high impact injuries to the sphenoid and maxillary bones.
The superior portion of the pterygoid processes are fused anteriorly; a vertical groove, the pterygopalatine fossa, descends on the front of the line of fusion. The plates are separated below by an angular cleft, the pterygoid notch, 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 the medial pterygoid muscle and the 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.
In many mammals it remains as a separate bone called the pterygoid bone.
Its name is Greek for "resembling a fin or wing", from its shape.
and 30 Related for: Pterygoid processes of the sphenoid information
Pterygoid, from the Greek for 'winglike', may refer to: Pterygoid bone, a bone ofthe palate of many vertebrates Pterygoidprocessesofthesphenoid bone...
The lateral pterygoid muscle (or external pterygoid muscle) is a muscle of mastication. It has two heads. It lies superior to the medial pterygoid muscle...
thesphenoid sinuses may extend into the roots ofthepterygoidprocesses or greater wings ofsphenoid bone, and may invade the basilar part ofthe occipital...
medial pterygoid plate of the sphenoid bone. The lateral and medial pterygoid plates (ofthepterygoidprocessofthesphenoid bone) diverge behind and enclose...
medial side ofthepterygoidprocessofthesphenoid bone, and to the perpendicular lamina ofthe palatine bone. "Origin ofthepterygoid bone and pharyngeal...
ThePterygoid notch (incisura pterygoidea) is a notch on the inferior portion ofthepterygoidprocessesofthesphenoid bone, between the medial and lateral...
between the maxilla and thepterygoidprocessofthesphenoid bone. They contribute to the walls of three cavities: the floor and lateral walls ofthe nasal...
process of the medial pterygoid plate ofsphenoid bone. The medial border articulates with ala of vomer. The orbital and sphenoidal processes are separated...
interval, formed by the divergence ofthe maxilla from thepterygoidprocessofthesphenoid. It connects the infratemporal with the pterygopalatine fossa...
Pterygopalatine is used to refer to structures ofthepterygoidprocessesofthesphenoid and the palatine bone. Specifically, it can refer to: Pterygopalatine...
base of the medial pterygoid plate, with which it will be described. Body ofsphenoid bone Body ofsphenoid bone Body ofsphenoid bone Dutton, Jonathan...
zygomatic process. This contains the alveolar canal. posteriorly, by the tympanic part ofthe temporal bone, and the spina angularis ofthesphenoid. superiorly...
with the lateral pterygoid plate ofthesphenoid. It gives origin to a few fibers ofthe medial pterygoid muscle. This article incorporates text in the public...
process: Thepterygoidprocessesofthesphenoid bone or processus pterygospinosus. Foramen of Civinini: Foramen pterygospinosum. NCBI Discovery of Plantar...
anterior surface ofthe greater wing ofsphenoid bone medial: perpendicular plate ofthe palatine bone and its orbital and sphenoidal processes lateral: pterygomaxillary...
descriptions of satisfactory pterygoidprocess and thesphenoid bone and clinoid bone tear. He gave a good description ofthesphenoid sinus in an adult...
plate of thesphenoid bone. The pterygospinous process is attached pterygospinous ligament which stretches towards the spine ofthesphenoid. http://www...
a reflection of periosteum between the lingula and petrous apex (or petrosal process) ofthesphenoid bone. The lacerum portion is still considered "extradural"...
between the ala ofthe vomer and the vaginal processofthesphenoid bone, medial to the palatovaginal canal, and lead into the anterior end ofthe palatovaginal...
bone 2 parietal bones 1 sphenoid bone 2 temporal bones The ossicles (three on each side) are usually not included as bones ofthe neurocranium. There may...
Global Information
