エゾヒグマ頭蓋の形態学的研究 : II. 縫合および軟骨結合の消滅順位について

スポンサーリンク

概要

• 論文の詳細を見る

• In the morphological changes of the skulls of tlte Yezo brown bear (Ursus arctosyezoensis Lyd.) showing growth with postnatal development were observed the oblitera-tion patterns of suturae and synchondroses.The materials used in this study were the 56 skulls (36 male and 20 female)described in the previous part of the present series. The closing degrees of suturas andsynchondroses were determined by the method employed by FREDERIC (Table I).In both male and female skulls, the obliteration of sutrae and synchondroses wasobserved earlier in the intraoccipital synchondroses, sutura lambdoidea, and S. sagittalis.It is assumed that the crista sagittalis externa and the linea nuchae superior, which arepeculiar forms of the male adult skull, may have resulted from the ossification of theperiosteum, because tlaey developed cleary after the obliteration of S.lamboidea arndS. sagittalis.As the sex difference in the obliteration of suturae, it was unoticed that S. occipitomastoidea, S. squamosa, and S. sphenosquamosa had been closed later in the maleskulls than in the female.The sutura and synchondrosis which were not closed event in the oldest skull wereS. zygomaticotemporalis and synchorndrosis intersphenoidalis.It is reasonable to consider that the os sphenoidale can be divided into two portions: that is, os sphenoidale anterior and os sphenoidale posterior.In the bear skull, no S. nasomaxillaris has been formed. The same view as merntioned above seems to be observed in the skull of Lagomorplaa and Rodentia.

• 1972-04-25

著者

• 末永 義圓

  北海道大学医学部解剖学教室

関連論文

• 作業療法学科における入学者選抜方法の現状と課題 : 全国国公立医療技術短期大学部作業療法学科へのアンケート調査から
• エゾヒグマ頭蓋の形態学的研究 : II. 縫合および軟骨結合の消滅順位について
• エゾヒグマ頭蓋の形態学的研究 : I. 頭蓋の成長について
• 228 鶏小脳皮質の組織発生 : III. 前頭断切片における所見 (解剖学分科会)(第74回日本獣医学会)
• 227 鶏脊髄の glycogen body に関する形態学的研究 : 孵化後における肉眼的観察 (解剖学分科会)(第74回日本獣医学会)
• エゾヒグマ頭蓋の形態学的研究 : III. 歯牙の咬耗様式と頭蓋成長について
• 骨格筋の形と触察法
• 医療技術者養成機関における解剖学教育の現状と問題点

スポンサーリンク