In the brain, the<unk> (or<unk>  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<unk> also contain choroid plexus, a specialized CSF-producing structure, that is continuous with that of the lateral and third ventricles above and below it.
Interventricular foramina 
Cortical homunculus
Cave of septum pellucidum
Cingulate sulcus
Medial eminence of floor of fourth ventricle
Cutis verticis gyrata
Horizontal fissure of cerebellum
Glia limitans