Brain Development Flashcards
When does the anterior neuropore close? posterior?
day 25 and 28
What transition must NC cells undergo?
epithelial to mesenchymal
What do dorsal NC cells become? Ventral? Other things?
melanocytes and skin follicles
ganglia and neurons
neurons of head and face as well
What day do the three primary brain vesicles form? from what?
day 28
expansions of the cranial neural tube
What three primary brain vesicles form as expansions from the cranial neural tube? what will they become?
prosencephalon -> forebrain
mesencephalon -> midbrain
rhombencephalon -> hindbrain
The prosencephalon divides into: ________ and _______ on day ____.
telecephalon and diencephalon
32
The Rhombencephalon divides into: ________ and _______ on day ____.
metencephalon
myelencephalon
32
The metencephalon is the future site of what two structures?
pons and cerebellum
What does the neural canal expand into in each vesicle?
a primitive ventricle
What does the primitive ventricle become in the rhombencephalon, mesencephalon, diencephalon, and telencephalon?
rhomb: 4th ventricle
mes: aqueduct of Sylvius
di: becomes 3rd ventricle
tel: lateral ventricles
How many places does the brain tube fold? When?
3 places
4-8weeks
What are the folds in the brain tube?
mesencephalic flexure within midbrain
cervical flexure between the myelencephalon and spinal cord
pontine flexure within the metencephalon
What does the rhombencephalon/hindbrain become?
brain stem
myelencephalon -> medulla oblongata (heart beat, breathing, swallowing)
metencephalon -> pons, cerebellum (coordination center for posture and movement)
Cerebellum begins forming around what time? until?
6th week -> birth
What can be found in the midbrain?
massive tracts of white matter than connect fore and hindbrains
