In which space does cerebrospinal fluid circulate?

In which space does cerebrospinal fluid circulate?

• A. Subarachnoid space
• B. Epidural space
• C. Intralenticular space
• D. Intraarachnoid space

Answer: (A)

CSF circulates in the subarachnoid space, the gap between the arachnoid membrane and the pia mater that surrounds the brain and spinal cord. It is produced mainly by the choroid plexus in the ventricles, flows through the ventricular system and into the subarachnoid space via openings at the brainstem, bathes the CNS, and is eventually reabsorbed into the venous system through arachnoid granulations. The epidural space lies outside the dura and does not contain CSF; the intralenticular region is within the lens of the eye and is unrelated to CSF circulation; the term intraarachnoid space isn’t a standard anatomical space.

CSF circulates in the subarachnoid space, the gap between the arachnoid membrane and the pia mater that surrounds the brain and spinal cord. It is produced mainly by the choroid plexus in the ventricles, flows through the ventricular system and into the subarachnoid space via openings at the brainstem, bathes the CNS, and is eventually reabsorbed into the venous system through arachnoid granulations. The epidural space lies outside the dura and does not contain CSF; the intralenticular region is within the lens of the eye and is unrelated to CSF circulation; the term intraarachnoid space isn’t a standard anatomical space.