Definition that contains fourth ventricle
- cerebral aqueduct a canal connecting the third and fourth ventricles
- sylvian aqueduct a canal connecting the third and fourth ventricles
- third ventricle a narrow ventricle in the midplane below the corpus callosum; communicates with the fourth ventricle via the Sylvian aqueduct
- aqueductus cerebri a canal connecting the third and fourth ventricles