Development of the brain

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Information about Development of the brain

Published on July 5, 2016

Author: AntonniKendallPrades

Source: slideshare.net

1. Development of the brain From day 19 to day 280

2. Day 19 • Earliest formation of the brain • Divided into forebrain, midbrain and hindbrain • Has been researched u n d e r studies for years • Has been recognized as embryonic brain • Develops at a quicker rate than the other organs • Can be found in the cephalon • In stage 9 brain can be seen as an organ of senses

3. Day 19 (Stage 9

4. Day 20 (Stage 9) • In day 20 brain has begun folding of neural folds • The eye fields appear distinct as dumbbell shaped areas that become the eyes • They are two somites in this stage

5. Day 21 (Stage 10) • The ear placodes are usually located in the hindbrain region

6. Day 21 (Stage 10)

7. Day 23 (Stage 10) • By late stage 10 the whole brain begins to become a tri regional brain which accommodates the cns • The optic sulcus is present • By the end of st 10 the neural folds close

8. Day 25 (Stage 11) • The anteirorous neuropore closes • The brain has neuromole neuromeres that include prosencephalon, mesencephalon, and rhombencephalon • The brain senses include the eye and ear vesicle

9. Stage 11

10. Stage 12 (28 days) • The brain enlarges further no and the considerable growth of the head is increased • The eyes lack lenses add and the ear becomes an otocyst • The nasal placodes begin to form

11. 28 days

12. 30 days • 5 components of the brain are formed • The eyes have lens sa discs • The nasal placodes are present • Otocyst formed • Cranial nerves form

13. 30 days

14. 32 days • Optic cup formed • Roof of fourth ventricle transparent and thin • Eyes not yet pigmented • Ear vesicle differentiated

15. 32 days

16. Week 5 • By week 5 brain rudiments by anterior most will be the telencephalon, which will be the cerebrum hemishear hemispheres • The ten telencephalon is the largest part of the brain which is the forebrain • The ear has ducts • The retina begins to pigment • End of week 5 the brain enlarges

17. Stage 16

18. Week 6 • The brain (anterior part) enlarges and the whole brain grows in size • The eyes are pigmented • The hindbrain thickens in wall width • By the end of week 6 the choroid plexus forms

19. Stage 18

20. Week 7 • The telencephalon grows and is 1/3 of all brain structures • The optic nerve forms, no longer an eye stalk • The semicurse semi circularcanals form in the inner ear, which develops balance • The retina is fully pigmented • The inside of telencephalon contains chorion choroid fissure

21. Stage 20

22. Week 9 • The brain is still large in vesicle size proportion • It has a thinner cerebral cortex • It has large ventricles which until the brain sac decreases in proportion

23. 9 weeks OLD (DAY 63)

24. 10-23 weeks old • Thickening of the cerebral cortex • Formation of sulci

25. 23-28 weeks old • Further convolution of the brain (folded gray matter)

26. 40 weeks old • Fully convoluted brain • Size of head 1/3 of the body • About 40 weeks signals in the body produced by the brain that makes signal receptors

27. Mature brain • In real life, the brain of the human adult is varying in knowledge as it grows • In your minds you have to face the reality • If you want perfect, you die

28. Death • aftermaths on your brain • After you die your memories will be gone and your images will be no longer existed • The brain can decompose t h e soft tissue I n t o the liquid itself • Decomposition takes a day • In reality, every person dies a rate of thousands every days or million times a day

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