Another pictures:
Description:
Lateral aperture (foramen of Luschka) - paired aperture at inferior medullary velum above the lateral recesses. Aperture is place of passage cerebrospinal fluid to subarachnoid space. Projection of choroid plexus extends into the two lateral apertures.
Superior medullary velum Lateral aperture Median aperture Choroid membrane Tenia of fourth ventricle Choroid plexus