The cerebral hemispheres are joined with midbrain by:

 # The cerebral hemispheres are joined with midbrain by:

A. Foramen of Monro

B. Foramen of Magendie

C. Foramen of Luschka

D. Crura Cerebri

The correct answer is A. Foramen of Monro.

In the brain, the interventricular foramina (or foramina of Monro) are channels that connect the paired lateral ventricles with the third ventricle at the midline of the brain. As channels, they allow cerebrospinal fluid (CSF) produced in the lateral ventricles to reach the third ventricle and then the rest of the brain's ventricular system. The walls of the interventricular foramina also contain choroid plexus, a specialized CSF-producing structure, that is continuous with that of the lateral and third ventricles above and below it.