Cerebrospinal fluid, used to support the |brain| and buffer it from physical |shock|, is created in and transmitted to the |brain|'s |lobes| by means of |lateral ventricles| which project branches, or horns (cornua), into the frontal, occipital, and temporal |lobes|. In addition to the two |lateral ventricles|, a |third ventricle| helps form cerebrospinal fluid and carries it to the structures of the midbrain, and a fourth ventricle supplies the |cerebellum| and the subarachnoid space of the |spinal cord|. Often, a spinal tap is conducted to check a sample of the cerebrospinal fluid, as this may show indications of disease or disorders of the |brain| or |spinal cord|.
