Neuroembryology Flashcards
Formation of Neural tube
Neurulation
T or F:
About the 16th day, the neural plate invaginates along its central axis to form a longitudinal median neural groove, which has neuralfolds on each side
F
18th Day
As the neural folds fuse to form neural tube, neuroectodermal cells migrate dorsolaterally to form ______ which soon divides into two cell masses
Neural crest
______ gives rise to the cells that forms the PNS and ANS; cranial, spinal & autonomic ganglia
Neural Crest
T or F
Neurulation begins during the early part of the 4th week
T
T or F:
Cranial 2/3 represents future brain; cranial neuropore closes on the 15th day
F
15th day
T or F
Caudal 1/3 represents future spinal cord; caudal neuropore closes 2 days later
T
Layers of Neural Tube
Ependymal layer
Mantle layer
Marginal layer
T or F
Axons are at first Unipolar;
F
Bipolar
Unipolar neurons in the spinal ganglia (DRG) are derived from?
neural crest cells
This produces myelin in the PNS.
Neurolemmal cells or Schwann cells
T or F
Recent evidence proves that Folic acid / Folate reduces the incidence of NTD’s by as much as 70% if 200 mg is taken dailybeginning 3 months prior to conception and continuing throughout gestation
F
400 mg
Type of Spina Bifida which contains meninges w/ CSF.
Spina Bifida with Meningocele
Fusion of the neural folds in the cranial region and closure of the rostral neuropore form how many primary brain vesicles?
Three
Prosencephalon divides into _____ and ______
Telencephalon
Diencephalon
