hypothalamus Flashcards
how does the brain start developing ?
it starts as a tube then 2 constriction occur then it divides the brain into 3 parts
what are the 3 parts of the brain that form from the 2 constriction?
forebrain
midbrain
hindbrain
which ones grow slowly compared to the others?
the hindbrain and midbrain grow much slower than the FOREBRAIN
Forebrain is faster
what are the components of the forebrain?
Telencephalon
diencephalon
what does the telencephalon consist of?
cerebral cortex
Basal ganglia
also forms the lateral ventricles
what does diencephalon consist of?
thalamos
hypothalamus
which part of the forebrain grows faster?
the telencephalon grows much faster than the diencephalon and it covers it like a mushroom
what is the function of the hindbrain?
vital autonomic functions
what is the function of the midbrain?
relay for visual and auditory signals
what is the function of the thalamus?
sensory relay ( receives all signals b4 reaching the cortex except the signals from olfactory )
what is the function of hypothalamus?
autonomic and endocrine function control
wheres the diencephalon located?
sandwiched between the cerebral cortex and it includes both thalamus and hypothalamus
what does the diencephalon serve as?
station between the brainstem and cortex
describe the lateral ventricles of the brain?
c shaped cavities located deep within each cerebral hemisphere –> expand in the hemisphere forming cavities
sits on top of the 2 thalamus
what forms the 3rd ventricle?
the 2 lateral ventricles join together and form the 3rd ventricle
what is the diencephalon divided into to?
Posterior diencephalon
anterior diencephalon
what does the dorsal ( posterior ) diencephalon consist of?
Epithalamus
Thalamus
Metathalamus
what does the ventral ( anterior ) diencephalon consist of?
hypothalamus
what is optic chiasm ?
area between the 2 superior optic canals where both optic nerves cross each others
it is anterior
what is found between the 2 thalamus?
3rd ventricle coming from lateral ventricles
where do descending tracts and ascending tracts has to go through?
the diencephalon because it a station between the brainstem and cerebral cortex and the thalamus receives signals from everywhere
what connects the 2 thalamus together?
interthalamic connection
where is the hypothalamus located?
anterior inferior
below the third ventricle and the thalamus
base of the brain
above the optic chiasm and the pituitary stalk ( infundibulum )
what forms the base of the brain?
the inter peduncular fossa ( area between the 2 peduncles of the brain ( stems )