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 living organism's attention to the environment.

Autism and the Womb https://youtu.be/NOVp4mIroug

Autism, Neurulation, & Embryogenesis https://youtu.be/TXkc93uGNuw

Autism & Eye Movements https://youtu.be/1amB5e9qzg4

Autism & Sensory Processing Part 1 https://youtu.be/HPvwvtu5hB4

Autism & Sensory Processing Part 2 https://youtu.be/iWy9Rligzic

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0:00 Daylight Computer Company

04:22 Neuralation and Brain Development

05:09 Maternal Factors and Biomarkers (Tyrosine, Hypothyroidism, etc.)

06:46 Tryptophan and Its Role in Embryogenesis

08:34 Environmental Insults and Toxins

09:19 Embryogenesis and Brain Formation (Proencephalon, Mesencephalon, Rhombencephalon

10:43 Telencephalon

10:57 Diencephalon

12:34 Rhombencephalon

12:52 Metencephalon

13:35 Myelencephalon

15:12 Evolutionary Perspective of the Mesencephalon

21:39 Chroma Light Devices

24:48 Mesencephalon’s Role in Motor Control, Sensory Processing, and Autism;

27:12 Extrapyramidal motor system; Substantia Nigra, Red Nucleus

30:11 Additional Nuclei of the Midbrain; Ocular Motor Nuclei; Edingher-Westphal; Trochlear nerve

31:58 Paraaqueductal Gray (PAG), "Retard Strength" and Its Role in Pain, Behaviors and Autism; "Freezing" in Flight, Fight, & Freeze

36:00 Eye Movements; learning & Neuroplasticity; Motor Planning, Proprioception, Language and Speech

38:20 Wrap Up

X: https://x.com/rps47586

Hopp: https://www.hopp.bio/fromthespectrum

YT: https://www.youtube.com/channel/UCGxEzLKXkjppo3nqmpXpzuA

email: [email protected]