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Question 1

VENTRAL

what do you see

Answer 1

2 pedunculus cerebri with fossa interpeduncularis between. caudally in the fossa there is the substansia perforata dorsalis(grey), and on either side in the fossa sulcus n. oculomotorii(III) (for the nerve)

Question 2

what is the level of the midbrain

Answer 2

eye level!! nerves exiting to enter the eye

Question 3

DORSAL

Answer 3

main structures except colliciuli

correspondant to the ventral sulcus: sulcus lat mesencephalii along the two pedunculi cerebri

Question 4

colliculi of the midbrain

Answer 4

dors (paired)
rostral collicolus: subcortical visual center
- lateral we se brachium, and lat to that the corpus geniculatum laterale
caudal collicolus: subcortical auditory center
- lateral we se brachium, and lat to that the corpus geniculatum mediale

the 4 together making the corpora quadrigemina

Question 5

caud to the colliculi (DORSAL)

Answer 5

two trigonum lemnisci lateralis

and btw the caudal colliculi we see the IV trochlear nerve arising from the frenulum veli

Question 6

CROSSECTION

midbrain - 3 sections dors->ventr

Answer 6

1 - lamina tecti (stratum griseum and str medullare
2 - tegmentum mesencephali
3 - pedunculus cerebralis

substantia nigra separate 2 from 3(and reg autonomic movement)

Question 7

CROSSECTION mesencephalon

grey matter:

Answer 7

nucleus ruber(muscle movement) on either side of aquaductus mesencephali(sorrunded by substantia grisea centralis)

Question 8

CROSSECTION mesencephalon
grey matter:
nuclei found around nucleus ruber

Answer 8

medial to both nucl ruber we see

1. nucl motorii n. oculomotorii
2. nucl motorii n. trochlearis
3. nucl parasymp n. oculomotorii

nucl pretectalis is found ventrolat to nucl ruber

Question 9

nucl parasymp n. oculomotorii aka

Answer 9

Edinger Westphal’s nucleus (EW)

Question 10

name the 5 parts of the diencephalon

Answer 10

1 - thalamus
2 - hypothalamus
3 - epithalamus
4 - subthalamus
5 - metathalamus

5 parts of grey matter sorrunding the IIIrd ventricle

Question 11

thalamus

Answer 11

two bulbs of either side of third ventricle on top of mesencephalon - help form the interventricular foramen btw 3rd and 4th ventricle. contain nuclei with tracts -which are the only part of the thalamus consisting of white matter

Question 12

thalamus connection btw the bulbs

Answer 12

adhered together with the interthalamic adhesion

Question 13

epithalamus

Answer 13

consists of a pineal body - connected to the thalamus by habenula. the habenula forms the connection with the commisura habenulare. this forms the pineal recess of the IIIrd ventricle

the pineal body is sorrunded by the plexus choroideus

Question 14

hypothalamus is found where

Answer 14

found rostrally, ventral to the floor of the third ventricle

Question 15

the structures of the hypothalamus

Answer 15

rostr to the midbrain peduncle - the corpus mammarilare are found, rostral to that two tuber cinerum are found with the infundibulum btw, forming the pituitary gland (aka hypophysis). the infundibulum forms a recessus infundibulare in the IIIrd ventricle

Question 16

optic chiasm

Answer 16

parts of it are part of the hypothalamus of the diencephalon. we also find the optic tracts sorrunding the IIIrd ventricle, which are also part of hypothalamus. this forms the rec. chiasmatis in the IIIrd ventricle

Question 17

IIIrd ventricle

Answer 17

found btw the two hemispheres of the cerebrum, it har a rostral and caudal lamina terminalis (memrane) with its rostr/caud commissura - a tract for comm btw the L and R hemispheres

the IIIrd ventricle is connected to the R+L lateral ventricle through the for. interventriculare, and to the IVth ventricle by the aquaductus mesencephali