neuro III Flashcards
Basal plate of brain becomes
umn center and LMN nuclei
brain stem: neural canal expands ____ (direction)
dorsally
alar plate structures shift
laterally and ventrally
basal plate structure
pushed or squeezed medially
white matter of marginzal zone ends up
intermitent with gray matter
neural canal opens into
4th ventricle
alar plate structures shift _____
laterally
basal plate (motor) structure pushed
medially
cerebrum and cerebellum initial organization is
completely redone
gray matter moves
externally
gray matter guided by
glial cells called radial glia
white matter ends up
internal
ependymal cells of ventricular zone line
line ventricular spaces
glandular part of pituitary gland
adenohypothphysis
neural part of pituitary gland
neurohypophysis
goal
neuarl, CNS input to endocrine regulation
what are the sources of adenohypophysis
surface ectoderm in region of developing mouth
what is the source of neurohypophysis
neuroectoderm
stomodeum
endoderm and ectoderm adjacent at cranial end
rathkes pouch of adenohypophysis
a dorsal diverticulum of hat will be the roof of the mouth
eventually loses connection to stomodeum and fuses with
neurohypophysis
ventral diverticulum of stomodeum (floor of developing brain)
neurohypophysis
neurohypophysis retains its connection to diencephalon via a stalk called
the infundibulum
cells of the _____ proliferate around the stalk
adenohypophysis
what are the meninges
membrane layers that surround the parts of the cns
dura mater
tough outer layer
arachnoid membrane
delicate, spider web-like, middle layer
pia mater
directly against CNS tissue
epidural space
outside dura mater
subdural space
between dura mater and arachnoid
subarachnoid space
between arachnoid and pia mater
epidural space in the spinal cord and vertebral canal
fat filled
epidural space of the skull
absent
subdural space
potential space
subarachnoid space
CSF
loose mesodermal tissue surrounds
neural tube after primary and secondary neurulation; that condenses to form dura mater
dura mater is
primarily dense collagenous connective tissue
in cranium, the mesodermal tissue consists of
an outer layer fused to the periosteum of bones surroundin ght ebrain and an inner layer
what is located between the two layers
venous sinuses
inner layer composed of 3 folds
falx cerebri
tentorium cerebelli
diaphragm sellae
falx cerebri
between cerebral hemispheres
tentorium cerebelli
between cerebrum and cerebellum
diaphragm sellae
between hypothalamus and pituitary gland
filum terminale
caudal most part of spinal cord tapered to narrow strand of ependymal and glial cells
caudal ligament
fuses with filum terminale and periosteum of one of the caudal vertebrae
