Brainstem anatomy

Question 1

Anterior choroidal artery branches off what?

Answer 1

Middle cerebral artery

Question 2

Anterior choroidal artery supplies

Answer 2

• optic tract
• choroid plexus in temporal horn of lateral ventricle
• thalamus/ hippocampus

Question 3

Anterior Medulla components

Answer 3

• pyramidal decussation
• olive
• pyramid
• Anterior median fissure

Question 4

Where does the Trochlear IV nerve emerge

Answer 4

groove beneath inferior colliculus

Question 5

What interrupts the anterior median fissure?

Answer 5

pyramidal decussation in the caudal medulla

Question 6

What nerve erupts from the anterolateral fissure on the anterior medulla?

Answer 6

Hypoglossal XII

Question 7

What nerves erupt for the post olivary nucleus?

Answer 7

IX, X

Question 8

The posterior columns on the medulla end where?

Answer 8

Gracile + Cuneate tubercles (nucleus)

Question 9

The sulcus limitans separates…

Answer 9

Sensory (lateral) and motor (medial) components

Question 10

Where does CN V errupt

Answer 10

Lateral of middle cerebellar peduncle (pons)

Question 11

CN VII + VIII emerge

Answer 11

Cerebellar-pontine angle

Question 12

Involved in visual fixation and eye movement

Answer 12

superior colliculus (direct input from retina)

Question 13

Involved in auditory system

Answer 13

inferior colliculus

Question 14

Where does oculomotor III emerge

Answer 14

interpeduncular fossa

Question 15

What does the inferior brachium do?

Answer 15

Carry fibers from inferior colliculus to median geniculate as part as ascending auditory system

Question 16

All cranial nerve nuclei are located in the

Answer 16

tegmentum

Question 17

Another name for tissue posterior to ventricle

Answer 17

tectum

Question 18

What tract carries pain and temperature

Answer 18

spinothalamic tract

Question 19

in what direction does the corticospinal tract go

Answer 19

descending

Question 20

At what level does the spinothalamic tract meet up with the medial lemniscus

Answer 20

pons—> travel together into the thalamus

Question 21

Where is the spinal trigeminal nucleus located

-lishowers tract and substantia gelantinosa also sit here

Answer 21

caudal medulla posteriolaterlly

Question 22

mediates pain and temperature in the face

Answer 22

Spinal trigeminal nerve

Question 23

What structures do internal arcuate fibers connect

Answer 23

medial lemniscus to nucleus gracilis and cuneatus ( 2nd order neurons)

Question 24

where is the medial longitudinal fasiculus located while in the caudal medulla

Answer 24

on top of (posterior) to the medial lemniscus

Question 25

medial longitudinal fasiculus function

Answer 25

coordinate eye movement

Question 26

At caudal medulla level where is the lateral cuneate nucleus located and what is its function

Answer 26

located in the fasiculus cuneatus and its function is arm propioception

Question 27

Hypoglossal nerve nucleus location

Answer 27

Rostral medulla posterior to medial longitudinal fasiculus

Question 28

After termination the fasiculus cuneatus and gracilis continue as

Answer 28

medial lemniscus

Question 29

Pyramids

Answer 29

rostral medulla

Question 30

pyramidal decussation

Answer 30

caudal medulla

Question 31

central canal

Answer 31

caudal medulla

Question 32

4th ventricle

Answer 32

rostral medulla

Question 33

inferior olivary nuclei

Answer 33

rostral medulla

Question 34

internal arcuate fibers from inferior olive to inferior cerebellar peduncle

Answer 34

rostral medulla

Question 35

location of oculomotor nerve nucleus

Answer 35

rostral modbrain

Question 36

termination of longitudinal median fasiculus

Answer 36

rostral midbrain at oculomotor nerve nucleus

Question 37

peri-aquaductal gray

Answer 37

rostral midbrain
surrounds fourth ventricle
pain modulation

Question 38

substantia nigra

Answer 38

located posterior to cerebral peduncle

-parkinsons develops upon degradation