Essentials of anatomy, including the anatomy of the viscera : arranged in the form of questions & answers prepared especially for students of medicine / Charles Nancrede.

  • Charles B. Nancrede
Date:
1899
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Licence: Public Domain Mark

Credit: Essentials of anatomy, including the anatomy of the viscera : arranged in the form of questions & answers prepared especially for students of medicine / Charles Nancrede. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    How is it developed? From one center in membrane, at the eighth fetal week. Tlie tensor tarsi muscle of Horner is attached to it. The Malar Bones. Describe them. Two small quadrangular bones placed at the upper outer part of the face, forming the prominence of the cheek, and parts of the orbital, temporal, and zygomatic fossa3. The ex- ternal surface (Fig. 21) is convex, smooth, and perforated by one or more malar foramina; just below the center the malar tuberositij gives origin to the two zygomatic muscles. The in- Busle: f:jzj3ed through /g»'- i tntpoTO'Mular (h.7iaZs r^^ Fig. 21.—Left malar bone, outer Fig. 22.-Left malar bone, inner surface. (Gray.) surface. ternal swface looks into the temporal and zygomatic fossa and articulates with the superior maxilla (Fig. 22). Superiorly a thick serrated fro}ifal process articulates with the external an- gular process of the frontal bone ; a thick, plate-like orbital process projecting backward, smooth and concave internally, forms part of the floor and outer w\all of the orbit; convex below, it forms part of the temporal fossa. It bounds the anterior extremity of the spheno-maxillary fissure. Its upper surface shows the orifices of one or more temporo-malar canals for filaments of the orbital Ijranch of the superior maxillary nerve. Externally, projecting ])ackward is the zygomatic process^ articulating with the zygomatic process of the temporal bone V^y a serrated margin. The maxillari/ process points downward and articulates wnth the superior maxilla.