n 1  :  SUPRASTERNAL NOTCH  2 a  :  a notch in the inferior border of the occipital bone behind the jugular process that forms the posterior part of the jugular foramen  b  :  a notch in the petrous portion of the temporal bone that corresponds to the jugular notch of the occipital bone and with it makes up the jugular foramen .
 
 
 
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