brainstem - internal anatomy of midbrain

Question 1

midbrains connects _____

Answer 1

pons and cerebellum with the
forebrain

Question 2

what is tentorial notch

Answer 2

butas sa tentorium cerebelli where brainstem and SC passes through

Question 3

the midbrain is transversed by ______

Answer 3

cerebral aqueduct

Question 4

what can be found at anterior inferior surface of midbrain

Answer 4

divergence the cerebral
peduncles

Question 5

what exits interpeduncular fossa

Answer 5

oculomotor
nerve (cranial nerve III)

Question 6

emerges from the dorsal aspect, curves around, and appears at the lateral borders of the cerebral peduncles

Answer 6

Trochlear nerve (cranial nerve IV)

Question 7

passes under the cerebral peduncles before the peduncles disappear into the substance of the cerebral hemisphere

Answer 7

optic tract

Question 8

what can be found at post midbrain

Answer 8

Corpora quadrigemina (Quadrigeminal plates)

Trochlear nerve

Question 9

what divides quadrigeminal plates

Answer 9

vertical and transverse groove

Question 10

found on lat surface of midbrain

Answer 10

sup and inferior brachium

Question 11

Pass from superior colliculus to lateral geniculate body and the optic tract

Answer 11

sup brachium - optic

Question 12

Connects the inferior colliculus to the medial geniculate body

Answer 12

Inferior Brachium - auditory

Question 13

fiber tracts that runs from basis

Answer 13

Crus cerebri

Question 14

posterior to the cerebral aqueduct; contains superior and inferior colliculi

Answer 14

tectum

Question 15

part of auditory pathway that Receives terminal fibers of lateral lemniscus

Answer 15

inferior Colliculus

Question 16

Emerging fibers pass laterally and posteriorly around the central gray and exit just below the inferior colliculi

Answer 16

Trochlear Nucleus

Question 17

found Lateral to the cerebral aqueduct

Answer 17

Mesencephalic Nuclei of Trigeminal Nerve

Question 18

Central part of the tegmentum anterior to the cerebral aqueduct

Answer 18

Decussation of the superior cerebellar peduncles

Question 19

found Lateral to decussation

Answer 19

Reticular Formation

Question 20

Ascends posterior to the substantia nigra

Answer 20

Medial lemniscus

Question 21

found Posterior to medial lemniscus

Answer 21

Spinal and Trigeminal lemnisci

Question 22

found Posterior to trigeminal lemniscus

Answer 22

Lateral lemniscus

Question 23

Large motor nucleus between
tegmentum and crus cerebri

Answer 23

substantia nigra

Question 24

substantia nigra is concerned c _____

Answer 24

muscle tone

Question 25

Connect the cerebral cortex to anterior horn of spinal cord, cranial nerve nuclei, pons and cerebellum

Answer 25

Crus cerebri

Question 26

Large nucleus that is part of the visual reflexes

Answer 26

Superior Colliculus

Question 27

sup colli Receives afferents from ______

Answer 27

optic nerve, visual cortex, and spinotectal tract

Question 28

sup colli Receives efferents from ______

Answer 28

tectospinal and tectobulbar tracts - responsible for the reflex movement of eyes, head, and neck

Question 29

afferent pathway for the light reflex ends in the ______

Answer 29

pretectal nucleus - contriction of pupils

Question 30

Small group of neurons close to the lateral part of the superior colliculus

Answer 30

pretectal nucleus

Question 31

After relaying in the pretectal nucleus, the fibers pass to the _______

Answer 31

PSY nucleus of oculomotor nerve (Edinger-Westphal nucleus)

Question 32

Situated in the central gray matter close to the median plane, just posterior to the MLF

Answer 32

Oculomotor nuc

Question 33

Rounded mass between the cerebral aqueduct and substantia nigra

Answer 33

Red Nucleus

Question 34

afferents of red nuc

Answer 34

corticospinal fibers superior cerebellar peduncle Lentiform subthalamic hypothalamic nuc substantia nigra and spinal cord

Question 35

efferents of red nuc

Answer 35

rubrospinal tract rubroreticular tract thalamus substantia nigra

Question 36

Mainly carries output from the cerebellum

Answer 36

Superior Cerebellar Peduncle

Question 37

Superior Cerebellar Peduncle decussates at level of ______

Answer 37

inferior colliculi at the midbrain