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Words near each other
・ ORCA card
・ Orbital node
・ Orbital ordering
・ Orbital overlap
・ Orbital part of frontal bone
・ Orbital part of inferior frontal gyrus
・ Orbital period
・ Orbital Period (album)
・ Orbital perturbation
・ Orbital perturbation analysis (spacecraft)
・ Orbital piercing
・ Orbital Piloted Assembly and Experiment Complex
・ Orbital plane (astronomy)
・ Orbital plate
・ Orbital pole
Orbital process of palatine bone
・ Orbital process of the zygomatic bone
・ Orbital prosthesis
・ Orbital Railway Line
・ Orbital replacement unit
・ Orbital resonance
・ Orbital Resonance (novel)
・ Orbital ring
・ Orbital Sciences Corporation
・ Orbital Sciences X-34
・ Orbital septum
・ Orbital Space Plane Program
・ Orbital spaceflight
・ Orbital speed
・ Orbital Stability


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Orbital process of palatine bone : ウィキペディア英語版
Orbital process of palatine bone

The orbital process of the palatine bone is placed on a higher level than the sphenoidal, and is directed upward and lateralward from the front of the vertical part, to which it is connected by a constricted neck. It presents five surfaces, which enclose an air cell. Of these surfaces, three are articular and two non-articular.
The articular surfaces are:
# the anterior or maxillary, directed forward, lateralward, and downward, of an oblong form, and rough for articulation with the maxilla
# the posterior or sphenoidal, directed backward, upward, and medialward; it presents the opening of the air cell, which usually communicates with the sphenoidal sinus; the margins of the opening are serrated for articulation with the sphenoidal concha
# the medial or ethmoidal, directed forward, articulates with the labyrinth of the ethmoid.
In some cases the air cell opens on this surface of the bone and then communicates with the posterior ethmoidal cells. More rarely it opens on both surfaces, and then communicates with the posterior ethmoidal cells and the sphenoidal sinus.
The non-articular surfaces are:
# the superior or orbital, directed upward and lateralward; it is triangular in shape, and forms the back part of the floor of the orbit; and
# the lateral, of an oblong form, directed toward the pterygopalatine fossa; it is separated from the orbital surface by a rounded border, which enters into the formation of the inferior orbital fissure.
==Additional images==

File:Orbital_bones.png|The seven bones which articulate to form the orbit.
File:Gray167.png|Articulation of left palatine bone with maxilla.
File:Gray192.png|Medial wall of left orbit.


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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