In male gorillas and orangutans (and some species of fossil hominin), in which very large chewing muscles are anchored to a relatively small cranial vault, the right and left superior temporal lines not only converge at the midline of the top of the cranial vault (along the sagittal suture), but also require the development of a sagittal crest to provide sufficient attachment area for the temporalis muscles. Disclaimer: AAAS and EurekAlert are not responsible for the accuracy of news releases posted to. This gorilla skull is great for mammalogy. Dreamstime is the worlds largest stock photography community. Even if a human skull was as thick and dense as a silverback, the bear could probably still crush it. However, the bones of the gorilla, especially the skulls, are more powerful and thicker than human skulls. In apes the superior extent of the temporalis muscles is positioned higher on the cranial vault (because brain size is smaller, and the muscles of mastication are larger than those found in humans), such that the right- and left-side superior temporal lines approach one another at midline. The gorilla skull has an anatomically correct movable lower jaw for easy demonstration of natural gorilla movement. Use them in commercial designs under lifetime, perpetual & worldwide rights. Fourth, no, a grizzly cannot grill a gorilla skull in his mouth Human skull No problem. In humans, who have large brains (and hence large cranial vaults) relative to their body size, the temporal muscles occupy a position on the lateral walls of the cranial vault, and extend only about halfway up the vault surface. Description: Male gorillas are the largest of the world primates, reaching heights of 6 feet (when standing erect) and. The crest provides a surface for the attachment of the large chewing muscle, temporalis.
Sagittal crests are rare in adult male chimpanzees and female gorillas, and are unknown in female chimpanzees, female orangutans, and humans and bonobos of both sexes (and are also absent in juveniles of all species). The sagittal crest is a prominent ridge of bone that projects superiorly (upwards) from the cranial vault along its midline, most commonly seen in adult male gorillas and orangutans.
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