where does the hypoglossal nerve exit the skull
Hypoglossal nerve The hypoglossal nerve arises as a number of small rootlets from the front of the medulla, the bottom part of the brainstem,[1][2] in the preolivary sulcus, which separates the olive and the pyramid.[3] The nerve passes through the subarachnoid space and pierces the dura mater near the hypoglossal canal, an opening in the occipital bone of the skull.[2][4]