Zygomatic process of temporal bone
Encyclopedia
The zygomatic process of the temporal bone is a long, arched process projecting from the lower part of the 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.
.
The inferior border, short, thick, and arched, has attached to it some fibers of the masseter
.
The medial surface is concave, and affords attachment to the masseter.
.
The posterior end is connected to the squama by two roots, the anterior and posterior roots.
Squama temporalis
The squama of the temporal bone forms the anterior and upper part of the bone, and is scale-like, thin, and translucent.- Surfaces :Its outer surface is smooth and convex; it affords attachment to the temporalis muscle, and forms part of the temporal fossa; on its hinder part is a vertical groove...
of the temporal bone
Temporal bone
The temporal bones are situated at the sides and base of the skull, and lateral to the temporal lobes of the cerebrum.The temporal bone supports that part of the face known as the temple.-Parts:The temporal bone consists of four parts:* Squama temporalis...
. It articulates with the zygomatic bone
Zygomatic bone
The zygomatic bone is a paired bone of the human skull. It articulates with the maxilla, the temporal bone, the sphenoid bone and the frontal bone. The zygomatic is homologous to the jugal bone of other tetrapods...
.
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 fasciaTemporal fascia
The temporal fascia covers the Temporalis muscle.It is a strong, fibrous investment, covered, laterally, by the Auricularis anterior and superior, by the galea aponeurotica, and by part of the Orbicularis oculi....
.
The inferior border, short, thick, and arched, has attached to it some fibers of the masseter
Masseter muscle
In human anatomy, the masseter is one of the muscles of mastication.In the animal kingdom, it is particularly powerful in herbivores to facilitate chewing of plant matter.-Origin and insertion of the two heads:...
.
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 boneZygomatic bone
The zygomatic bone is a paired bone of the human skull. It articulates with the maxilla, the temporal bone, the sphenoid bone and the frontal bone. The zygomatic is homologous to the jugal bone of other tetrapods...
.
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 th.
- 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 tubercleArticular tubercleThe anterior root of the posterior end of the outer surface of the Squama temporalis, continuous with the lower border, is short but broad and strong; it is directed medialward and ends in a rounded eminence, the articular tubercle .This tubercle forms the front boundary of the mandibular fossa,...
(eminentia articularis).