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12 Cards in this Set
- Front
- Back
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Place the following in Chronological order:
Palatal shelf elevation Fusion of Mandibular Procceses Neural Tube formation Closure of Cranial Sutures Embryonic Folding Formation of trilaminar Branchial Arch formation |
trilaminar
neural tube formation embryonic folding branchial arch formation fusion of mandibular processes palatal shelf elevation closure of cranial sutures |
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Preimplantion Period
time? path/doing what? |
1st 6 days
travel down fallopian tube, dividing |
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2nd week
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Bilaminar disc, upper(epiblast) lower(hypoblast), primitive streak via division/migration of epiblast
epiblast migrate to middle cell layer-->trilaminar embryo 3 layers ecto,meso, endoderm |
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3 week
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Neuralation: notochord induces overlying ectoerm to form neural plate-->neural tube-->spinal chord/brain
Neural Crest cells migrate to mesoderm from ectoderm--> ectomesenchyme Crucial for craniofacial development otherwise Treacher-collins |
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ID primary germ layer of origin for each:
Muscles of Mastication Lining of Gut Enamel Lining of Ear Canal Oral Mucosa |
Muscles of Mastication:mesorderm
Lining of Gut:endoderm Enamel:ectoderm Lining of Ear Canal:ectoderm Oral Mucosa:ectoderm |
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4 week
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Embryonic Folding along lat and heat tail axis forming a tube. Ectoderm outside, tube of endoderm inside, mesoderm in between
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Craniofacial Development
Time period? Facial develop? |
4-12 weeks, facial 4 weeks
1. Brancial Arch 1-mandibular processes fuse at midline via true fusion 2. Bilateral maxillary processes form from 1st arch grow on side of stomodeum fusing with medial nasal processes 3. true fusion + apparent fusion b/w medial nasal processes -->explains philtrum, why cleft lips no center |
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Palate Formation
Sequence with time periods |
Palate Formation
Hard : medial nasal processes Soft: maxillary Processes 1. Palatal shelves grow vertically(week 7) 2. Fusion of shelves(week 9) and to nasal septum seperating nasal/oral cavity |
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Define:
Tetraogen Notochord Stomodeum Ectomesenchyme |
Tetraogen: agents causing developmental defects
Notochord: rod shaped body derived from mesoderm, support embryo and induce neurulation Stomodeum: Precursor of mouth Ectomesenchyme: embryonic connective tissue for cranial facial development. From Ecto migrate to meso |
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enamel
detnin meckel's lining of oral cavity |
neural crest
neural crest neural crest ectoderm |
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Which Processes failed to fuse in patient with cleft lip?
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Maxillary and medial nasal
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which processes failed to fuse in patient with cleft palate?
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mandibular-mandibular
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