Central%20Nervous%20System%20and%20Epidermis

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Central Nervous System and Epidermis
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Neurulation

• What are the major derivatives of the ectoderm?

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Neurulation

• What is the difference between primary and
  secondary neurulation?

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Primary Neurulation

• What are the major events of primary neurulation?

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Primary Neurulation

• What is involved in the shaping of the neural
  plate?

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Primary Neurulation

• What is responsible for the bending of the neural
  plate?

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Primary Neurulation

• How does neural tube closure compare in birds and
  mammals?

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Primary Neurulation

• What causes spina bifida and anencephaly in human
  development?

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Primary Neurulation

• What allows the neural tube to separate from the
  overlying ectoderm?

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Secondary Neurulation

• Where can secondary neurulation be seen?

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Neural Tube Differentiation

• Differentiation occurs on three levels
• gross anatomical
• bulges and constrictions
• parts of brain and spinal cord
• tissue changes
• rearrangements of different cell populations
• forms functional regions
• cellular changes
• neurons
• glial cells

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Anatomical Differentiation
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Tissue Differentiation

• What appears to be responsible for ventral
  patterning of neural tube?

How can this been demonstrated experimentally?
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Tissue Differentiation

• What appears to be responsible for dorsal
  patterning of neural tube?

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Tissues of the CNS

• What are the three major layers formed in the
  spinal cord and medulla?

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Tissues of the CNS
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Tissues of the CNS

• How is the cerebellum organized?

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Tissues of the CNS

• How is the cerebrum organized?

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Tissues of the CNS

• How do we know that neural stem cells exist in
  the adult brain?

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Vertebrate Eye

• What inductive event initiates eye formation?

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Vertebrate Eye

• Into what type of structure does the neural
  retina differentiate?

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Vertebrate Eye

• How does cornea and lens differentiate?

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Epidermis

• Epidermis develops from outer ectodermal cells
• first 2 layers form
• periderm
• basal layer
• then 5 layers form

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Epidermis

• What growth factors are involved in epidermal
  development?

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Cutaneous Appendages

• How do cutaneous appendages such as hair, scales,
  feathers and glands form?

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Cutaneous Appendages

• What is known about the genetic control of hair
  formation?

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Cutaneous Appendages