which ventricle is located between the two halves of the thalamus
Thalamus It is a midline symmetrical structure of two halves, within the vertebrate brain, situated between the cerebral cortex and the midbrain. The medial surface of the two halves constitute the upper lateral wall of the third ventricle.[clarification needed]
Hypothalamus The hypothalamus is located below the thalamus and is part of the limbic system.[1] In the terminology of neuroanatomy, it forms the ventral part of the diencephalon. All vertebrate brains contain a hypothalamus. In humans, it is the size of an almond.