Zygomatic process of temporal bone
5642268
213701789
2008-05-20T14:02:49Z
Gracillis
4775916
[[th:ส่วนยื่นกระดูกขมับจดกระดูกโหนกแก้ม]]
{{Infobox Bone |
Name = Zygomatic process of temporal bone |
Latin = processus zygomaticus ossis temporalis |
GraySubject = 34 |
GrayPage = 139 |
Image = Gray137.png |
Caption = Left [[temporal bone]]. Outer surface. Showing the zygomatic process projecting to the left side of the bone |
Image2 = Processuszygomaticusossisfrontalis.PNG |
Caption2 = Articulation of the mandible. Lateral aspect. (Zygomatic process visible at center.) |
System = |
MeshName = |
MeshNumber = |
DorlandsPre = p_34 |
DorlandsSuf = 12667776 |
}}
The '''zygomatic process of the temporal bone''' is a long, arched process projecting from the lower part of the [[Squama temporalis|squamous portion]] of the [[temporal bone]]. It articulates with the [[zygomatic bone]].
This process is at first directed lateralward, its two surfaces looking upward and downward; it then appears as if twisted inward upon itself, and runs forward, its surfaces now looking medialward and lateralward.
==Borders==
The superior border is long, thin, and sharp, and serves for the attachment of the [[temporal fascia]].
The inferior border, short, thick, and arched, has attached to it some fibers of the [[Masseter muscle|masseter]].
==Surfaces==
The lateral surface is convex and subcutaneous.
The medial surface is concave, and affords attachment to the masseter.
==Ends==
The anterior end is deeply serrated and articulates with the [[zygomatic bone]].
The posterior end is connected to the squama by two roots, the anterior and posterior roots.
* The posterior root, a prolongation of the upper border, is strongly marked; it runs backward above the [[external auditory meatus]], and is continuous with the [[temporal line]].
* The anterior root, continuous with the lower border, is short but broad and strong; it is directed medialward and ends in a rounded eminence, the [[articular tubercle]] (eminentia articularis).
==See also==
* [[Zygomatic arch]]
==Additional images==
<gallery>
Image:Gray164.png|Left zygomatic bone in situ.
Image:Gray187.png|Base of skull. Inferior surface.
</gallery>
==External links==
* {{RocheLexicon|34257.000-1}}
{{Gray's}}
{{musculoskeletal-stub}}
[[Category:Skeletal system]]
[[Category:Skull]]
{{Skull}}
[[sv:Okbensbåge]]
[[th:ส่วนยื่นกระดูกขมับจดกระดูกโหนกแก้ม]]