Neuroembryology Flashcards
Formation of the neural tube (neurolation) occurs at _______ age?
a. 3rd week AOG
b. 5-6 weeks AOG
c. 7 weeks AOG
d. 9 weeks AOG
e. NOTA
A
Myelination of the pyramidal tracts is almost completed at what age postnatally?
a. 6 mos
b. 1 year
c. 2 years
d. 5 years
e. adult
C
The failure of the dorsal induction gives rise to the following congenital anomalies except:
a) Meningocoele & myelomeningocoele
b) Arnord chiari malformation
c) Myeloschisis
d) Cleft Lip
e) Anencephaly
D
The oral ectodermal origin of the pituitary gland is derived from
a) Infundibulum
b) Rathke’s pouch
c) Tuber cinerreum
d) Hypophyseal pouch
e) Evagination from the mesencephalon
B
The neural plate forms at which gestational age?
3rd week
Primary neurulation refers to the formation of which neural structure?
Neural tube
The neural tube develops into which part of the nervous system?
CNS
Three bulges that are apparent in the fourth week as primary vesicles
Prosencephalon, mesencephalon, rhombencephalon
Five bluges that are apparent in the fourth week as secondary vesicles
Telencephalon, diencephalon, mesencephalon, metencephalon, myelencephalon
The prosencephalon gives rise to which of the secondary vesicles?
Telencephalon and diencephalon
The rhombencephalon gives rise to which of the secondary vesicles?
Metencephalon and myelencephalon
The human nervous system is derived from which germ cell layer?
a. ectoderm
b. mesoderm
c. endoderm
d. notochord
e. yolk sac
a
The myelencephalon becomes which structure in the adult brain?
Medulla
Thalamus and hypothalamus derive from which secondary vesicle?
Diencephalon
The pons and the cerebellum derive from which secondary vesicle?
Metencephalon
