Everything about The Hypoglossal Canal totally explained
The
hypoglossal canal is a bony canal in the
occipital bone of the
skull.
Anatomy
It transmits the
hypoglossal nerve from its point of entry near the
medulla oblongata to its exit from the base of the skull near the
jugular foramen. It lies in the
epiphyseal junction between the basiocciput and the jugular process of the occipital bone.
Theorized role in speech
The Hypoglossal canal has recently been used to try to determine the antiquity of human speech. Researchers have found that hominids who lived as long as 2 million years ago had the same size canal as that of modern day chimpanzees, some scientists thus assume they were incapable of speech. However, archaric H. sapiens 400,000 years ago had the same size canal as that of modern humans, meaning they could have been capable of speech. Some Neanderthals also had the same size hypoglossal canal as archaic H. sapiens. However recent studies involving several primate species have given inconclusive results as to whether there's any association between its size and speech .
Additional images
Image:Gray193.png|Base of the skull. Upper surface.
Image:Gray308.png|Median sagittal section through the occipital bone and first three cervical vertebræ.
Further Information
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