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Figure Shows How the CNS is divided to supply different structures

The forebrain is made up of six prosomeres. These have designated numbers from caudal to cranial. Each prosemere are subdivided into two tiers, dorsal (alar) and ventral (basal). The alar tiers of p6 and p5 gives rise to the telencephalon while the basal tier of p5 and p6 are associated with the visual apparatus and the olfactory respectively. The midbrain is made up of two mesomeres, m1 and m2. These contain the superior and inferior colliculi respectively. The 12 rhombomeres, numbered r0 to r11 gives rise to the hindbrain. [1]


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