The Brain Repetitive Positions and Notes

Question 1

cerebellum

Answer 1

off of the brain, posterior to the brain stem
contains the arbor vitae and folia

Question 2

precentral gyrus

Answer 2

gyrus anterior to the central sulcus

Question 3

central sulcus

Answer 3

sulcus that travels down to the lateral sulcus
NOT half way on the side of the brain

Question 4

postcentral gyrus

Answer 4

gyrus posterior to the central sulcus

Question 5

lateral sulcus

Answer 5

horizonal, ‘one stroke’, defines the temporal lobe

Question 6

longitudinal fissure

Answer 6

fissure that separates the right and left hemisphere

Question 7

transverse fissure

Answer 7

fissure that separates the cerebellum from the cerebrum

Question 8

insula lobe

Answer 8

DEEP in the brain, can only be seen when you pull apart the temporal lobe and parietal lobe via the lateral sulcus

Question 9

dura mater

Answer 9

relatively hard and firm, parchment like surrounding of the brain

Question 10

arachnoid mater

Answer 10

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)

Question 11

falx cerbri

Answer 11

attached to the dura mater, it goes into the longitudinal fissure, separating left and right hemisphere
WITH LONGITUDINAL FISSURE

Question 12

tentorium cerbella

Answer 12

attached to the dura mater, separates the cerebellum from the cerebrum
tent shape when whole
WITH TRANSVERSE FISSURE

Question 13

pons

Answer 13

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

Question 14

medulla oblongada

Answer 14

inferior to the pons
anterior to the spinal cord
the second bump on the brain stem

Question 15

spinal cord

Answer 15

the end of the brain stem
inferior to the pons and medulla oblongada
inferior to the cerebellum (most times)

Question 16

mammillary bodies

Answer 16

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)

Question 17

optic chaisma

Answer 17

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

Question 18

olfactory bulb and tract

Answer 18

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

Question 19

trigenimal nerve

Answer 19

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

Question 20

optic nerve

Answer 20

see optic chiasma, the ‘horns’ that come off of the optic chaisma
aka cranial nerve 2

Question 21

corpora quadrigemini

Answer 21

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

Question 22

infundibulum

Answer 22

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

Question 23

vermis

Answer 23

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

Question 24

flocculonodular lobes

Answer 24

part of the cerebellum, the last ‘branch’ of the cerebellum when counting from anterior to posterior

Question 25

corpus callousum

Answer 25

the superior most structure that is not a lobe of the brain, tough and darker than surroundings connects the left and right brain hemispheres

Question 26

anterior commisure

Answer 26

a DOT anterior to the brain (duh), and can be found just off the anterior tip of the corpus callousom

Question 27

fornix

Answer 27

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

Question 28

cingulate gyrus

Answer 28

gyrus that surround the corpus collousum from the superior edge sometimes can be very distinct in its boarders, sometimes not

Question 29

choroid plexus

Answer 29

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

Question 30

lateral ventricles

Answer 30

in the middle of the brain, two distinct parts separated by the septum pallucidum inferior to the corpus collousum, superior to the fornix

Question 31

3rd ventricle

Answer 31

found near the thalamus (actually encases it IRL but in a hemisection hard to see) often pinned in the triangle posterior to the thalamus

Question 32

4th ventricle

Answer 32

found posterior to the brain stem, the posterior edge of such is the cerebellum also a triangle/pinned as such

Question 33

cerebral aquaduct

Answer 33

posterior to where the cerebellum attaches to the brain a distinct line often pinned in the crevice between such

Question 34

septum pallucidum

Answer 34

not always visual, depends on the hemisection the membranous 'curtain' that separates the lateral ventricles very delicate

Question 35

thalamus

Answer 35

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)

Question 36

hypothalamus

Answer 36

literally hypo, or posterior to, the thalamus, not very distinct above the mammillary bodies and the optic chaisma

Question 37

midbrain

Answer 37

the superior most part of the brain stem inferior to the thalamus, corpora quadrigemini NOT distinct

Question 38

pineal body

Answer 38

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)

Question 39

arbor vitae

Answer 39

translates to the 'tree of life' (roughly) the 'branches' found in a hemisection of the cerebellum

Question 40

folia

Answer 40

the grooves on the cerebellum (its version of a gyrus. kinda) surround the arbor vitae

Question 41

circle of willis

Answer 41

a 'circle' of blood vessels, found anterior to the pons and encompassing the mammillary bodies, pituitary gland, but NOT the optic nerves

Question 42

basilar artery

Answer 42

a major artery that lies posterior to the pons, thicker than the other arteries

Question 43

vertebral arteries

Answer 43

the posterior separations of the basilar artery, separates into left and right parts

Question 44

internal carotid arteries

Answer 44

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