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17 Cards in this Set
- Front
- Back
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From what layer does the entire vertebrate nervous system develop?
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Ectoderm
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What is the one component of the nervous system not derived from ectoderm?
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Microglia which are derived from mesoderm.
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Regarding the alar plate: where is it and what does it develop into?
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Dorsal
Sensory |
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Regarding the basal plate: Where is it and what does it become?
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Ventral
Motor |
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What is the name of the groove which seperates the alar plate and basal plate?
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Sulcus limitands.
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From what portion of the developing CNS is the retina derived?
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Telencephalon
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What does the telencephalon become?
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Cerebral hemispheres (including retina)
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What does the diencephalon develop to become?
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Thalamus
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What does the metancephalon develop to become?
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Pons & Cerebellum
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What does the myelencephalon become?
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Medulla
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Name the three divisions of the rostral portion of the neural tube at five weeks?
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Prosencephalon (forebrain)
Mesencephalon (midbrain) Rhombencephalin (hindbrain) |
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Name the five divisions of the rostral portion of neural tube present at seven weeks?
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Telencephalon
Diencephalon Mesencephalon Metancephalon Myelencephalon |
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Where is the cephalic flexure?
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Between midbrain and forebrain
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Where is the pontine flexure?
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Between the metencephalon and myelencephalon.
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Where is the cervical flexure?
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Between the brain and spinal cord
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What occurs in anencephaly?
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Neural tube fails to close leading to minute brain and skull.
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What occurs in spina bifida?
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Lower spinal cord and nerve roots are underdeveloped.
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