<Tr> <Td> median aperture (Magendie) </Td> <Td> fourth ventricle </Td> <Td> subarachnoid space via the cisterna magna </Td> </Tr> <Tr> <Td> right and left lateral aperture (Luschka) </Td> <Td> fourth ventricle </Td> <Td> subarachnoid space via the cistern of great cerebral vein </Td> </Tr> <P> The four cavities of the human brain are called ventricles . The two largest are the lateral ventricles in the cerebrum; the third ventricle is in the diencephalon of the forebrain between the right and left thalamus; and the fourth ventricle is located at the back of the pons and upper half of the medulla oblongata of the hindbrain . The ventricles are concerned with the production and circulation of cerebrospinal fluid </P> <P> The structures of the ventricular system are embryologically derived from the neural canal, the centre of the neural tube . </P>

Where are the ventricles located in the brain
find me the text answering this question