brain part 2: exam 4 (final) Flashcards
what is located between the brain stem and cerebrum it is hollow contains the 3rd ventricle?
the diencephalon
what is 80% of the diencephalon?
the thalamus
what is the mass of nerve fibers connecting right and left sides of thalamus and crosses the 3rd ventricle?
intermediate mass (thalamus)
what is the internal medullary lamina?
they are little walls of tissue that break up gray matter of thalamus into: a) anterior nuclear group b) medial nuclear group c)lateral nuclear group (process sensory info)
what is inferior/anterior of the thalamus, has no blood brain barrier?
the hypothalamus
what is the mammillary region of the hypothalamus?
it is near the mid brain, contains mammillary bodies, processes sense of smell.
what is the middle inferior of hypothalamus that contains the stalk of the pituitary gland?
tuberal region
what is the supraoptic region?
area superior to optic chiasma (eye)
what is the preoptic region?
most anterior part of hypothalamus
what is the roof of the diencephalon; it is a thin bit of tissue superior to the thalamus, extends to the pineal gland (pineal body), posterior to the thalamus?
epithalamus
what is the the cerebrum?
most anterior/superior part of the brain, in humans cerebrum grows forward and lateral and covers the diencephalon (wrinkly region)
what is the wrinkled area, layer of grey matter 2-4 mm thick?
the cerebral cortex
what is gyri?
they are folds of the cerebral cortex, increases surface area of the brain
what are the shallow crevices between the gyri?
sulci
what are fissures?
deep folds of cerebral cortex between the gyri
what is on the mid-line of the brain that separates cerebrum into right and left hemispheres?
longitudinal fissure
what is the corpus callosum?
it is a band of white matter at bottom of longitudinal fissure allows right and left hemispheres to communicate
what is an extension of dura mater of meningies that extends into longitudinal fissure?
falx cerebri
what are lobes of the brain?
cerebral hemispheres are divided into 4 lobes
1) frontal
2)parietal
3) temporal
4)occipital
lobes are separated by fissures and sulci
what separates the frontal and parietal lobes?
the central sulcus
what separtes the frontal and temporal lobes?
lateral cerebral sulcus
what separates the parietal and occipital lobes?
the parietoccipital sulcus
what is the transverse fissure?
separates the cerebrum from the cerebellum
what is white mater?
all material deep to cerebral cortex most of mass of the cerebrum (nerve endings) (interior of cerebrum)
what are groups of nuclei (grey mater, cell bodies) buried deep in white matter, communicate with lower brain regions?
basal ganglia
where is the cerebellum located?
its inferior to the cerebrum, posterior to brain stem
what is the vermis of the cerebellum?
it is the constricted region at midline
what is the cerebellar hemisphere?
expanded regions lateral to vermis, separated into lobes:
a) anterior lobe
b) posterior lobe
c) flocculonodular lobe
what are the ridges on the cerebellum surface?
folia
doe sthe cerebellum have grey mater?
yes on the outer surface of the cerebellum is gray mater
does the cerebellum have white mater?
yes it is deep in cerebellum and forms a branched structure called the arbor vitae
what is the cerebellar nuclei?
areas of grey mater in white mater
what are tracts of white mater connecting the cerebellum to brain stem?
cerebellar peducles
what is the inferior cerebellar peducles?
connects to the medulla oblongata
what is the middle cerebellar peduncle?
connects to pons
what is the superior cerebellar peduncles?
connects to midbrain
