Neurulation, Neuroepithelial Cells, & Mesencephalon

Why doesn't the MESENCEPHALON further subdivide into larger regions of the brain?

In this episode, we will expand on the neurulation time and focus on the brain formation, spotlighting the proencephalon, mesencephalon, and rhombencephalon, which emerge around days 22–23 of embryonic life. The proencephalon (forebrain) splits into the telencephalon—think cerebral hemispheres for cognition—and the diencephalon, home to the thalamus and hypothalamus for sensory and hormonal control. Meanwhile, the rhombencephalon (hindbrain) divides into the metencephalon (pons and cerebellum, key for movement) and myelencephalon (medulla, handling [mostly] autonomic essentials like breathing). The mesencephalon stands out as a non-subdividing relay hub. The mesencephalon offers tremendous insights into the Autistic phenotype with its roles in biasing the livi ...