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The jugal bone is located on either side of the skull in the circumorbital region. It is the origin of several masticatory muscles in the skull. [1] The jugal and lacrimal bones are the only two remaining from the ancestral circumorbital series: the prefrontal, postfrontal, postorbital, jugal, and lacrimal bones. [2]
These extended margins of thinned bone are called supratemporal fossae. Synapsids, including mammals, have one temporal fenestra, which is ventrally bordered by a zygomatic arch composed of the jugal and squamosal bones. This single temporal fenestra is homologous to the infratemporal fenestra, as displayed most clearly by early synapsids. [2]
In tetrapods with a quadratojugal bone, it often forms a portion of the jaw joint. Developmentally, the quadratojugal bone is a dermal bone in the temporal series, forming the original braincase. The squamosal and quadratojugal bones together form the cheek region [4] and may provide muscular attachments for facial muscles. [5]
In anatomy, the zygomatic arch, or cheek bone, is a part of the skull formed by the zygomatic process of the temporal bone (a bone extending forward from the side of the skull, over the opening of the ear) and the temporal process of the zygomatic bone (the side of the cheekbone), the two being united by an oblique suture (the zygomaticotemporal suture); [1] the tendon of the temporal muscle ...
Anatomy figure: 22:5b-12 at Human Anatomy Online, SUNY Downstate Medical Center; Anatomy figure: 22:4a-08 at Human Anatomy Online, SUNY Downstate Medical Center; cranialnerves at The Anatomy Lesson by Wesley Norman (Georgetown University) (IX, XI) "Anatomy diagram: 34257.000-1". Roche Lexicon - illustrated navigator. Elsevier.
The acromion is a bony ridge on the lower part of the scapula that functions in providing an attachment for the clavicle. [2] [3] Nodosaurids develop a pronounced spur known as the pseudoacromion, which probably formed an attachment site for the Musculus scapulohumeralis anterior, and therefore is analogous with the acromion of mammals. [4 ...
From January 2008 to December 2012, if you bought shares in companies when James D. Sinegal joined the board, and sold them when he left, you would have a 41.8 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
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