The Brain Repetitive Positions and Notes Flashcards
cerebellum
off of the brain, posterior to the brain stem
contains the arbor vitae and folia
precentral gyrus
gyrus anterior to the central sulcus
central sulcus
sulcus that travels down to the lateral sulcus
NOT half way on the side of the brain
postcentral gyrus
gyrus posterior to the central sulcus
lateral sulcus
horizonal, ‘one stroke’, defines the temporal lobe
longitudinal fissure
fissure that separates the right and left hemisphere
transverse fissure
fissure that separates the cerebellum from the cerebrum
insula lobe
DEEP in the brain, can only be seen when you pull apart the temporal lobe and parietal lobe via the lateral sulcus
dura mater
relatively hard and firm, parchment like surrounding of the brain
arachnoid mater
meninge of the brain that is similar to cling-wrap in how it attaches to the brain
translucent white film
think of spider webs (arachnoid -> arachnid -> spider -> spider web)
falx cerbri
attached to the dura mater, it goes into the longitudinal fissure, separating left and right hemisphere
WITH LONGITUDINAL FISSURE
tentorium cerbella
attached to the dura mater, separates the cerebellum from the cerebrum
tent shape when whole
WITH TRANSVERSE FISSURE
pons
superior to the medulla oblongada and spinal cord
anterior to the cerebral aqueduct and 4th ventricle
covered by the basilar artery when the whole brain is upside down
trigenimal nerve comes out of the sides of the pons
orb like
medulla oblongada
inferior to the pons
anterior to the spinal cord
the second bump on the brain stem
spinal cord
the end of the brain stem
inferior to the pons and medulla oblongada
inferior to the cerebellum (most times)
mammillary bodies
posterior to the infundibulum and pituitary gland
anterior to the pons
when on the whole brain, it is in the ‘pit’ (depression) area, and looks somewhat like breasts (mammillary glands, mnemonics)
optic chaisma
the optic nerves (cranial nerve 2) join here, the chaisma is the ‘valley’ plus the space after which
anterior to the pons and mammillary bodies
posterior to the olfactory bulb and tract
firmer than other nerve POI
olfactory bulb and tract
part of a ‘string’ that emerges anterior to the optic nerves/optic chaisma
the sting is very flat and thin, WEAK and EASILY BROKEN
the bulb is the end/tip of the string (shown as rounded) and the tract is what leads up into the POI
aka cranial nerve 1, although as compared to optic nerve v. cranial nerve 2, this is not a true name replacement
trigenimal nerve
often shown cut as ‘moose antlers’, but IRL this is not the case, mostly just stubs
easy to tell b/c the nerve emerges from the sides of the pons
aka cranial nerve 5
optic nerve
see optic chiasma, the ‘horns’ that come off of the optic chaisma
aka cranial nerve 2
corpora quadrigemini
found in the brain hemisection
found near where the cerebellum attaches to the cerebrum, two lumps
can be seen as 4 lumps if hemisected in a particular manner
the superior lump is the superior colliculi and the inferior lump is the inferior colliculi
infundibulum
found between the optic chaisma (anterior) and the mammillary bodies (posterior), the infundibulum holds the pituitary gland in the brain (often times the pituitary gland is knocked off, so no need to identify it in lab)
if the infundibulum is also knocked off, identifiable as a hole between the optic chaisma and the mammillary bodies
vermis
very, VERY posterior
between the two hemispheres of the cerebellum, know as the ‘worm between the butt cheeks’
very small and stringy, often cut short
flocculonodular lobes
part of the cerebellum, the last ‘branch’ of the cerebellum when counting from anterior to posterior
corpus callousum
the superior most structure that is not a lobe of the brain, tough and darker than surroundings
connects the left and right brain hemispheres
anterior commisure
a DOT
anterior to the brain (duh), and can be found just off the anterior tip of the corpus callousom
fornix
mnemonics, FLOOR of the lateral ventricles
typically seen as a distinct line, but if that is not the case assume the inferior most part of the lateral ventricle
cingulate gyrus
gyrus that surround the corpus collousum from the superior edge
sometimes can be very distinct in its boarders, sometimes not
choroid plexus
can be found IN ALL VENTRICLES, a very textured bit of tissue
often times a line, seen most often in lab around the 4th and lateral ventricles
produces cerebral spinal fluid
lateral ventricles
in the middle of the brain, two distinct parts separated by the septum pallucidum
inferior to the corpus collousum, superior to the fornix
3rd ventricle
found near the thalamus (actually encases it IRL but in a hemisection hard to see)
often pinned in the triangle posterior to the thalamus
4th ventricle
found posterior to the brain stem, the posterior edge of such is the cerebellum
also a triangle/pinned as such
cerebral aquaduct
posterior to where the cerebellum attaches to the brain
a distinct line
often pinned in the crevice between such
septum pallucidum
not always visual, depends on the hemisection
the membranous ‘curtain’ that separates the lateral ventricles
very delicate
thalamus
a very central orb, found smack dab in the middle of the brain
actually two spheres joined together, which is why a hemisection will have an interthalamic adhesion (which is seen as a dot, in the middle, often larger than the anterior commisure)
hypothalamus
literally hypo, or posterior to, the thalamus, not very distinct
above the mammillary bodies and the optic chaisma
midbrain
the superior most part of the brain stem
inferior to the thalamus, corpora quadrigemini
NOT distinct
pineal body
hard to find in lab (ive never seen it however others have)
found at the posterior tip of the corpus collousum (squeezed between that and the corpora quadrigemini)
arbor vitae
translates to the ‘tree of life’ (roughly)
the ‘branches’ found in a hemisection of the cerebellum
folia
the grooves on the cerebellum (its version of a gyrus. kinda)
surround the arbor vitae
circle of willis
a ‘circle’ of blood vessels, found anterior to the pons and encompassing the mammillary bodies, pituitary gland, but NOT the optic nerves
basilar artery
a major artery that lies posterior to the pons, thicker than the other arteries
vertebral arteries
the posterior separations of the basilar artery, separates into left and right parts
internal carotid arteries
two arteries, left and right, typically cut so the hole of insertion is the only thing seen
often the the direct left and right of the optic nerves/optic chaisma, as it IS A PART of the circle of willis
