dezvoltarea SN Flashcards

1
Q

inceput/final

A

primul care incepe sa se dezvolte & ultimul care isi incheie dezvoltarea (dupa nastere)

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2
Q

saptamana 2

A

inainte de implantatie, masa de celule se transforma in
epiblast (ectoderm primitiv)
hipoblast (endoderm primitiv)

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3
Q

saptamana 3

A

linia primitiva apare la nivelul fetei dorsale a epiblastului
disc embrionar tridermic (gastrulatie)
nodul primitiv hensen -> notocord -> (inductie) placa neurala -> sant neural

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4
Q

saptamana 4

A

plicile neurale -> (fuzionare) tub neural - marginit de creste neurale

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5
Q

cand se inchid extremitatile tubului neural?

A
neuropor ant (cranial) z 25
neuropor post (caud) z 27
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6
Q

ce se intampla la inchiderea tubului neural?

A

se desprind celulele crestelor neurale (masa celulara responsabila de dezvoltarea SNP)

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7
Q

structuri derivate din crestele neurale (10)

A
ggl senz n V, VII, IX, X, n sp, n veg
cel cromafine MSR
cel Schwann
melanocite
n SNE
pia mater & arahnoida
cel parafolic tiroidiene
odontoblaste
schelet craniofacial
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8
Q

cum influenteaza notocordul portiunile tubului neural si ce se formeaza?

A

port ant/cran nu se afla sub actiunea notocordului -> dezvoltare encefal
port post/caud se afla sub actiunea inductiva negativa a notocordului -> dezvoltare MS

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9
Q

veziculele primare (3)

A

prozencefal
mezencefal
rombencefal

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10
Q

veziculele ce provin din prozencefal + ce se formeaza din ele (4 1/2, 3 1/2)

A

telencefal -> arhicortex, paleocortex, neocortex, corpii striati, 1/2 s hipotalamus
diencefal -> talamus, metatalamus, epitalamus, 1/2 inf hipotalamus, chiasma optica, neurohipofiza

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11
Q

ce se formeaza din mezencefal (3)

A

mezencefal, tectum, pedunculi cerebrali

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12
Q

veziculele ce provin din rombencefal + ce se formeaza din ele (3, 2, 2)

A

metencefal -> puntea, pedunculii cerebelosi mijlocii, cerebel
mielencefal -> bulb, pedunculii cerebelosi inferiori
istm -> pedunculi cerebelosi superiori, val medular superior

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