Jugular tubercle
Encyclopedia
The upper surface of the lateral parts of occipital bone
Lateral parts of occipital bone
The lateral parts of the occipital bone are situated at the sides of the foramen magnum; on their under surfaces are the condyles for articulation with the superior facets of the atlas....

 presents an oval eminence, the jugular tubercle, which overlies the hypoglossal canal
Hypoglossal canal
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...

 and is sometimes crossed by an oblique groove for the glossopharyngeal, vagus, and accessory nerve
Accessory nerve
In anatomy, the accessory nerve is a nerve that controls specific muscles of the shoulder and neck. As part of it was formerly believed to originate in the brain, it is considered a cranial nerve...

s.

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