Search results
Results From The WOW.Com Content Network
The occipital bun pointed out on a Neanderthal skull. The occipital bun is a protuberance of the occipital bone. Its size and shape has been compared to that of a dinner roll. It is a quintessential trait of Neanderthals, though it is a trend in archaic Homo species. The true purpose of the occipital bun has not yet been defined. [3]
The occipital torus is moderately wide, and a deep sulcus that is somewhat continuous along the superior nuchal line makes this formation pronounced. A suprainiac depression is either not found above it, or, like Bilzingsleben , it is not preserved in the fossil as it sits high and starts with the opisthocranion .
The under surface of the jugular process is rough, and gives attachment to the Rectus capitis lateralis muscle and the lateral atlanto-occipital ligament; from this surface an eminence, the paramastoid process, sometimes projects downward, and may be of sufficient length to reach, and articulate with, the transverse process of the atlas.
The occipital bone overlies the occipital lobes of the cerebrum. At the base of the skull in the occipital bone, there is a large oval opening called the foramen magnum, which allows the passage of the spinal cord. Like the other cranial bones, it is classed as a flat bone. Due to its many attachments and features, the occipital bone is ...
Occipital bun, a protuberance of the occipital bone, which looks like a hair knot [14] Projecting mid-face (midsagittal prognathism) Projecting jaws (maxillary and mandibular prognathism) Less neotenized skull than of a majority of modern humans [7] Low, elongated skull with flat lambdoid region; Broad cranial vault with "en bombe" parietal ...
At the back of the skull, the occipital torus extends in a relatively straight line, though laterally curves downward at termination (at the sides of the head). The occipital torus can be bordered by furrows ( sulci ) on the top and bottom margins (for muscle attachment), and the bottom margin of the torus gradually fades.
The occipital torus thickness also known as the occipital bun which is the back of the head was also fairly thick compared to most H. erectus with a thickness of 18.5 mm. [11] OH 9 being the largest cranium capacity, helped us learn the increase of brain growth in H. erectus.
Xu and Bae distinguished H. juluensis by a low and wide skull, large brain size (over 1,000 cc), a small and inward mastoid part of the temporal bone, a depression over the parietal bone, defined temporal lines, a high squamous part of temporal bone, an ovoid ear canal, a Neanderthal-like bony labyrinth (in the ear), a weak occipital torus (bar ...