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Foramen magnum of prosimians and humans



The foramen magnum of prosimians (left) and humans (right) (after ).

                                                                         
In anatomy, the large opening in the lower rear of the skull or occiput, through which the spinal nerves enter the brain (from Latin foramen, “opening” and magnum,”big” or “great”). In humans with upright posture, it is near the base of the skull. In quadrupeds, including prosimians and monkeys, it is near the back of the skull.

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