MHS Module 6- development + protection p3
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20 Terms
functions of limbic system:
establishes emotional states
links conscious functions of cerebral cortex with autonomic functions of brainstem
facilitates memory storage and retrieval
what occurs to the neural tube in embryonic development (E.R)
develops into the CNS
rostral portion enlarges to form 3 primary brain vesicles:
prosencephalon (forebrain)
mesencephalon (midbrain)
rhombencephalon (hindbrain)
how are secondary brain vesicles formed:
forebrain and hindbrain
what do secondary brain vesicles form?
telencephalon
diencephalon
mesencephalon
metencephalon
myelencephalon
what occurs to the diencephalon and mesencephalon in embryonic development:
stay as
what occurs to the telencephalon in embryonic development:
forms cerebrum
what occurs to the mesencephalon in embryonic development:
forms cerebellum and pons
what occurs to myelencephalon in embryonic development:
forms medulla oblongata
what are the physical protections of the brain:
bones of the cranium
cranial meninges
cerebrospinal fluid
name the cranial meninges:
dura mater
arachnoid mater
pia mater
explain dura mater:
inner fibrous layer (meningeal cranial dura)
outer fibrous layer (periosteal cranial dura)
what are dural folds:
extensions of inner fibre layer into cranial cavity
stabilises and supports brain
contain collecting veins
name the 3 largest dural folds:
falx cerebri
tentorium cereblli
falx cerebelli
explain falx cerebri:
projects between cerebral hemispheres
contains superior sagittal sinus and inferior sagittal sinus
explain tentorium cerebelli:
separates cerebrum from cerebellum
contains transverse sinus
explain fall cerebelli:
divides cerebellar hemispheres below tentorium cerebelli
explain arachnoid mater:
covers brain
attaches to dura mater, may be separated by subdural space
where is the subarachnoid space
lies between arachnoid and Pia mater
explain Pia mater:
attached to brain surface by astrocytes
what is biochemical isolation:
blood brain barrier