関連する実験動画
Updated: Aug 3, 2026

09:26
Quantification of Orofacial Phenotypes in Xenopus
Published on: November 6, 2014
Oreopithecus bamboliiの頭蓋骨の容量は,その頭蓋骨の容量によって決定されています
まとめ
Oreopithecus bamboliiの頭蓋骨容量の推定値は,オランウータンやチンパンジーなどの現代の類人猿の範囲に属する. これは,Oreopithecus bamboliiがホミノイドであり,類人猿と特徴を共有していることを示唆しています.
科学分野:
- 古人類学は,古人類学である.
- プリマトロジー・プリマトロジー学
- 化石ホミノイドの化石
背景:
- オレオピテコス・バンボリー (Oreopithecus bambolii) は,現在絶滅したヒト型霊長類の一種である.
- その系統遺伝的位置を理解するには,詳細な解剖学的分析が必要です.
研究 の 目的:
- Oreopithecus bamboliiの頭蓋骨容量を推定するために.
- Oreopithecus bamboliiが頭蓋骨の指標に基づいてホミノイド分類に該当するかどうかを判断する.
主な方法:
- 1958年8月の骨格の石膏再現を用いた頭蓋骨容量の推定.
- 推定頭蓋骨容量の比較と,現存するホミノイド (オランウータン,チンパンジー) の既知の範囲の比較.
主要な成果:
- Oreopithecus bamboliiの推定頭蓋骨容量は276から529立方センチメートルである.
- この範囲は,オランウータンやチンパンジーで観察された変化と重なり合っている.
結論:
- 頭蓋骨の容量に基づいて,Oreopithecus bamboliiはホミノイドに分類されています.
- 身体と脳の比率のさらなる分析も,そのホミノイドの地位を支持するかもしれない.
キーワード:
クラニオメトリー (クラニオメトリー)関連する概念動画
Bone Formation by Intramembranous Ossification
Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...
Overview of the Skull
The cranium (skull) is the skeletal structure of the head that supports the face and protects the brain. It is subdivided into the facial bones and the brain case, or cranial vault. The facial bones underlie the facial structures, form the nasal cavity, enclose the eyeballs, and support the teeth of the upper and lower jaws.
The cranial vault surrounds and protects the brain and houses the middle and inner ear structures. This cavity is bounded superiorly by the rounded top of the skull, which...
The cranial vault surrounds and protects the brain and houses the middle and inner ear structures. This cavity is bounded superiorly by the rounded top of the skull, which...
Cranial Bones: Superior and Posterior View
The superior view of the cranium shows the frontal and paired parietal bones.
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
The frontal bone is the single bone that forms the forehead. At its anterior midline, between the eyebrows, there is a slight depression called the glabella. The frontal bone also forms the supraorbital margin of the orbit. Near the middle of this margin is the supraorbital foramen, the opening that provides passage for a sensory nerve to the forehead. The frontal bone is thickened just above each supraorbital margin,...
Cranial Bones: Lateral View
The lateral view of the cranium is dominated by temporal, sphenoid, and ethmoid bones.
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...
Anatomy of the Brain: Ventricles
There are hollow fluid-filled cavities known as ventricles deep inside the human brain. There are two lateral ventricles, one in each cerebral hemisphere, and each has three different projections — the anterior, inferior, and posterior horns visible from the lateral side. A thin membrane called the septum pellucidum separates the two lateral ventricles. The slender third ventricle in the diencephalon is connected to each lateral ventricle via a channel called the interventricular foramen. The...
Cerebrum: Anatomical Overview I
The main and largest component of the human brain is the cerebrum. The cerebrum consists of two main parts: the cerebral cortex, an outer layer with wrinkles or folds known as gyri and shallow grooves called sulci, and a deeper region beneath it. The cerebrum divides into two distinct hemispheres and contains five different lobes: the frontal, parietal, temporal, occipital, and insula. The central sulcus separates the frontal and parietal lobes and two functionally important gyri — the...

