Lecture 2: General Development of NS

3rd week

development of the NS begins at the _________ of embryonic development

neural plate

the ectoderm thickens to form the __________

neural groove

neural plate folds inward to form the ________

neural tube

by the end of the 4th week, the neural folds completely fuse together to form the ________

brain, spinal cord

the neural tube eventually becomes the ______ and _______

prosencephalon, mesencephalon, rombencephalon

during the 4th week of embyonic development, the neural tube forms 3 bulges (primary vesicles): ________, _________, ________

prosencephalon

from the neural tube, develops into the cerebrum

mesencephalon

from the neural tube, develops into the midbrain

rhombencephalon

from the neural tube, develops into the brainstem/cerebellum

spinal cord

the end of the neural tube becomes the ________

secondary vesicles

formed during the 5th and 6th week of embryonic development

telencephalon, diencephalon

prosencephalon divides into ________ and ________ (secondary vesicles)

metencephalon, myencephalon

rhombencephalon divides into ________ and ________ (secondary vesicles)

telencephalon

develops into the cerebral hemispheres during the 5th/6th week of embryonic development

diencephalon

becomes the thalamus and hypothalamus during the 5th/6th week of embryonic development

metencephalon

becomes the pons/cerebellum during the 5th/6th week of embryonic development

myelencephalon

becomes the medulla during the 5th/6th week of embryonic development

ventricular system, central canal

the cavity of the neural tube forms the ____________ of the adult brain and the _________ of the spinal cord

spina bifida, anencephaly

defective closure of the neural tube can cause congenital conditions such as _________ and _________