Prenatal Brain Development and Organization Formation of Neural - - PowerPoint PPT Presentation

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Prenatal Brain Development and Organization Formation of Neural - - PowerPoint PPT Presentation

Mar 11, 2024 92 likes •268 views

Prenatal Brain Development and Organization Formation of Neural Tube Three primordial tissues endoderm mesoderm ectoderm Which tissue does nervous system develop from? ectoderm Neural crest Neural crest Neural Tube

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Prenatal Brain Development and Organization

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Formation of Neural Tube

  • Three primordial

tissues

– endoderm – mesoderm – ectoderm

  • Which tissue does

nervous system develop from?

– ectoderm

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SLIDE 3

Neural crest

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SLIDE 4

Neural crest

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Neural Tube Related Birth Defects

Anterior neural pore Posterior neural pore

failure to close = anencephaly failure to close = spina bifida

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  • Neural crest

becomes peripheral nervous system (PNS)

  • Neural tube

becomes central nervous system (CNS)

  • Somites become

spinal vertebrae.

Somites

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SLIDE 7

Three-vesicle stage (Week 4)

Prosencephalon

  • r forebrain

Mesencephalon

  • r midbrain

Rhombencephalon

  • r hindbrain
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SLIDE 8

mesencephalon metencephalon myelencephalon 6 weeks 4 weeks

Five-vesicle stage

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Differentiation of Forebrain

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Human Brain at Birth 6 Years Old 14 Years Old

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A lot can go wrong.

  • Rate of neurogenesis incredibly rapid.
  • Failure to form appropriate connections

may be basis of many neurological and psychiatric disorders.