neural tube development Flashcards
endoderm
inner
- lining of internal organs
mesoderm
middle
- muscles and bone
ectoderm
outer
- nervous system and skin
neural plate?
portion of ectoderm that develops into the nervous system
what is the neural tube?
a tube that develops from an inwards folding of the neural plate
- precursor to the entire central nervous system
neurulation?
the process that creates the neural tube fro neural plate
when does neuralation occur?
22 days into embryotic development
1 step of neurulation?
neural plate sinks/folds inward in a u shape to form the neural groove
step 2 of neurulation?
lateral ends of the neural plate become the walls of the neural groove and are called neural folds
step 3/ final step of neurulation?
the two fold come together medially to fuse and form the neural crest
the neural groove closes -> becomes neural tube
medial plate pathway?
lateral neural plate pathway?
neuro pore?
openings/gaps in the neural tibe
anencephaly
failure to close - anterior/rostral end of neural tube
- incomplete brain and skulls
- death
spina bifida?
failure to close - posterior/caudal end of neural tube
- sac of spinal fluid protruding from mid to lower back
- impairs ability to walk, damages bladder and bowl control
- causes hydrocephalus
