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24 Cards in this Set
- Front
- Back
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trilaminar disk
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consists of ectoderm mesoderm notocord
formed during gastrulation |
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neuroectoderm formation route
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ectoderm induced by notocord --> induction to form neural plate --> forms neuroectoderm
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invagination forms the...
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mesoderm
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ectoderm is formed by...
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the epiblast
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in neurlation
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neural plate forms
neural plate folds neural groove closes |
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neural plate formation begins
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during the third week...by the induction of primitive node...AKA NEURAL INDUCTION!
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as a result of neural induction...
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ectoderm cells differentiate into neuroectoderm
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cranial to caudal development
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common in the body!
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neural plate folds into neural tube at...
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4th week!
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somites
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flanks on spinal cord
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where does notocord lie
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deep to neural plate!
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neural folds consist of...
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neuroepi and adjacent surface ectoderm
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neural groove
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surrounds neural plates
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neural groove deepens and fuses to form...
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the neural tube!
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day 22
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neural fold formation begins!
where?!..in the region of future occipital and cervical spincal cord...proceeds rostally and caudally |
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cranial opening is called
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anterior/cranial neuropore!
closes day 24-25 |
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caudal opening is called...
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posterior/caudal neuropore
closes day 26-27 |
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layers in neural tube closure
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"roof plate" and surface ectoderm
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neural tube in tail bud is formed by...
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secondary neuralation: finished by 8 weeks...
sacral and coccygeal portions! |
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medullary cord
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in 2ndary neuralation where tail buds form a solid mass
eventually forms a lumen and merges with the neural canal |
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brain vesicle formation
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after closure of cranial neuropores. represented by number of dilations
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neural crest formation
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cells from top of neural fold dissociate from tube and form this
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neural crest cells develop into...
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ganglia of spinal nervers..post ganglionic ANS neurons...schwann cells of PNS
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ventricular formation of CNS
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formed from neural tube cavity
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