. An atlas of human anatomy for students and physicians. Anatomy. Interparietal portion of the occipital bone Squama occipitalis -Supra-occipital portion . Condylar portion, or exoccipital Pars lateralis Anterior condylar foramen Canalis condyloideus Basilar portion, or basi-occipital—Pars basilaris Fig. 114.—The Portions of the Occipital Bone from a Human Fcetus at the End of the Sixth Month (Months of Four Weeks Each). Seen from Within. Body-length, 12 inches. Internal occipital protuberance Protuberantia occipitalis interna Tabular portion Anterior condylar foramen Canalis condyloideus Post
. An atlas of human anatomy for students and physicians. Anatomy. Interparietal portion of the occipital bone Squama occipitalis -Supra-occipital portion . Condylar portion, or exoccipital Pars lateralis Anterior condylar foramen Canalis condyloideus Basilar portion, or basi-occipital—Pars basilaris Fig. 114.—The Portions of the Occipital Bone from a Human Fcetus at the End of the Sixth Month (Months of Four Weeks Each). Seen from Within. Body-length, 12 inches. Internal occipital protuberance Protuberantia occipitalis interna Tabular portion Anterior condylar foramen Canalis condyloideus Posterior condylar foramen Canalis hypoglossi. Interparietal portion of the occipital bone Squama occipitalis 1 *Sutura mendosa1 .True supra-occipital portion Posterior intra-occipital synchondrosis Synchondrosis intra-occipitalis posterior Condylar portion, or exoccipital Pars lateralis Anterior intra-occipital synchondrosis Synchondrosis intra-occipitalis anterior 'Basilar portion, or basi-occipital—Pars basilaris Fig. 115.—The Occipital Bone of a Child aged Fifteen Months. Seen from Within. 1 The human occipital hone consists uf four elements, which are --till separate at birih, being united by intervening cartilage; these are, thi rst'lar portion (basilar process), the two condylar portions, and the tabular portion. In comparative anatomy these are known respectively as basi-occipital, exoccipttals, and supra-occipital. The basi-occipital and the exoccipitals ossify each from a single nucleus ; the supra-occipital ossifies from four nuclei, an upper pair and a lower. These soon unite, but leave for some time fissures running in along the superior curved line. Not uncommonly this fissure persists on one or both sides through life, and in rare cases there is a persistent suture running right across and dividing the tabular portion of the occipital bone into two parts (*Sutura mendosa ; see Figs, in and 114). Of these two parts, the lower, which belongs to the base of the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1919
