Problem:
I have a hard time finding out a small detail about the ventricle system.
As the CSF flows into the 4th ventricle, there's a small foramen in the lateral aspect, as well as an open space bounded by the medulla and cerebellum.
Question: Do both these lead the same place?
Question: Is the space under the arachnoid matter only accessed through the small foramen, whereas the space between the medulla and cerebellum leads into the spinal column?
Give reasoning with your answer.