Assertion: mastoid process's portion | /r/CapableOf | access posterior fossa
Facets:
Source sentences:
text: The posterior (rear) portion accesses the posterior fossa, which is the opening at the base of the skull that cradles the cerebellum and brain stem.
text: The posterior (rear) portion accesses the posterior fossa, which is the opening at the base of the skull that cradles the cerebellum and brain stem.