. Quain's Elements of anatomy. ity in a properly graduated vessel, special precautions being taken toensure as neaiiy as possible an equal pressure in both operations. The capacity of the normalhuman cranium varies from to cubic centimetres (about 60 to 110 cubic inches),•with an average in all races of cubic centimetres (85 cubic inches). Skulls with acapacity of from l.:?r)0 to cubic centimetres are placed in a middle group and termednietocTpfiijIir. those exceeding cubic centimetres in capacity are mrr/ac/jilui/ir. and thosebelow cubic centimetres are mic
. Quain's Elements of anatomy. ity in a properly graduated vessel, special precautions being taken toensure as neaiiy as possible an equal pressure in both operations. The capacity of the normalhuman cranium varies from to cubic centimetres (about 60 to 110 cubic inches),•with an average in all races of cubic centimetres (85 cubic inches). Skulls with acapacity of from l.:?r)0 to cubic centimetres are placed in a middle group and termednietocTpfiijIir. those exceeding cubic centimetres in capacity are mrr/ac/jilui/ir. and thosebelow cubic centimetres are micmccphalic (Flower). The following examples are ofmales only :— Cub. cpntim Cub. inches. Eskimo . . 1500 91-5 European 1480 90-3 Chinese and Mongols. 1430 87-3 African Xegroes ] 350 82-4 Native Australians . 1300 79-3 Andaman Islandeis . 1280 78-1 Before proceeding to the consideration of the linear measurements it is necessary to referto certain definite points on the surface of the skull from which such measurements are. Fig. 84.—Side view of skull OF X MALE AUSTRALIAN. (After Flower.) A, alveolar point ; S, sub-nasal point ; N, nasion ; G],glabella ; Op, ophryon ; Bg,bregma ; Ob, obelion ; L,lambda ; 0, occipital point ;I, inion ; B, ; Pt,pterion ; St, stephanioii; As, ; Gl O, length ofcranium ; B N, basinasallength ; B A, basialveolarlength ; N S, nasal height. taken, or which have aparticular importance aspresenting varieties of moreor less frefiuent occurrence,and to which special nameshave been given not of ordi-nary use in descriptiveanatomy. These are : — Alveola)- ^w<«^ (fig. 84, A).—The centre of the anterior margin of the upperalveolar arch. Suhnaml or apinal j)oint (S).—The middle of the inferior border of the anterior nasalaperture at the base of the nasal spine. yaxiiiii or 7iusal 2)0hit, (X).—The middle of the naso-frontal suture. Ophvium or tmpruorhltal point (Op).—The middle of the supraorbital line, which, drawnacross the n
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectanatomy
