Medial pterygoid plate
Bone: Medial pterygoid plate Sphenoid bone. Anterior and inferior surfaces. (Medial pterygoid plate labeled at bottom left.) Sphenoid bone. Upper and posterior surfaces. (Medial pterygoid lamina labeled at center right.) Latin lamina medialis processus pterygoidei Gray's subject #35 151
The medial pterygoid plate (or medial pterygoid lamina) of the sphenoid is narrower and longer than the lateral pterygoid plate; it curves lateralward at its lower extremity into a hook-like process, the pterygoid hamulus, around which the tendon of the Tensor veli palatini glides.
Superiorly the medial plate is prolonged on to the under surface of the body as a thin lamina, named the vaginal process, which articulates in front with the sphenoidal process of the palatine and behind this with the ala of the vomer.
The angular prominence between the posterior margin of the vaginal process and the medial border of the scaphoid fossa is named the pterygoid tubercle, and immediately above this is the posterior opening of the pterygoid canal.
On the under surface of the vaginal process is a furrow, which is converted into a canal by the sphenoidal process of the palatine bone, for the transmission of the pharyngeal branch of the internal maxillary artery and the pharyngeal nerve from the sphenopalatine ganglion.
The pharyngeal aponeurosis is attached to the entire length of the posterior edge of the medial plate, and the Constrictor pharyngis superior takes origin from its lower third.
Projecting backward from near the middle of the posterior edge of this plate is an angular process, the processus tubarius, which supports the pharyngeal end of the auditory tube.
The anterior margin of the plate articulates with the posterior border of the vertical part of the palatine bone.
- SUNY Figs 22:4b-05
- Roche Lexicon - illustrated navigator, at Elsevier 25420.000-1
- Roche Lexicon - illustrated navigator, at Elsevier 34257.000-1
Bones of head and neck: the neurocranium of the skull (TA A02.1.01–07, GA 2.129–155) OccipitalOther Parietal Frontal Temporal SphenoidSurfacesOther EthmoidPlatesSurfaces
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medial pterygoid plate — n PTERYGOID PLATE (b) … Medical dictionary
pterygoid plate — n either of two vertical plates making up a pterygoid process of the sphenoid bone: a) a broad thin plate that forms the lateral part of the pterygoid process and gives attachment to the lateral pterygoid muscle on its lateral surface and to the… … Medical dictionary
Medial pterygoid — can refer to: Medial pterygoid muscle Medial pterygoid plate This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the l … Wikipedia
Medial pterygoid muscle — Medial pterygoid The Pterygoidei; the zygomatic arch and a portion of the ramus of the mandible have been removed. (Internus is visible at center bottom.) … Wikipedia
pterygoid plate — noun : pterygoid lamina * * * pterygoid plate, either of the two sections, the lateral section or the medial section, that make up a pterygoid process … Useful english dictionary
pterygoid plate medial — lamina medialis processus pterygoidei … Medical dictionary
Lateral pterygoid plate — Infobox Bone Name = Lateral pterygoid plate Latin = lamina lateralis processus pterygoidei GraySubject = 35 GrayPage = 151 Caption = Medial wall of left orbit. (Label pterygoid plate labeled at bottom right.) Caption2 = Sphenoid bone, anterior… … Wikipedia
pterygoid canal — n an anteroposterior canal in the base of each medial pterygoid plate of the sphenoid bone that gives passage to the Vidian artery and the Vidian nerve called also Vidian canal * * * canalis pterygoideus … Medical dictionary
pterygoid hamulus — n a hook shaped process forming the inferior extremity of each medial pterygoid plate of the sphenoid bone and providing a support around which the tendon of the tensor veli palatini moves … Medical dictionary
Pterygoid fossa — Infobox Bone Name = Pterygoid fossa Latin = f. pterygoidea ossis sphenoidalis GraySubject = 35 GrayPage = 151 Caption = Sphenoid bone. Upper and posterior surfaces. (Pterygoid fossa labeled at left.) Caption2 = System = Precursor = MeshName =… … Wikipedia