Lecture 4- Brainstem

Question 1

Which cranial nerves have their nuclei in the midbrain? In the pons? And in the medulla oblongata?

Answer 1

Midbrain: CN III, IV, V
Pons: CN V, VI, VII, VIII
Medulla: CN V, IX, X, XII

Question 2

Fill this out

Answer 2

Question 3

Divisions of the Brainstem:

________: only in the midbrain
________: ascending tracts
_________: descending tracts

Answer 3

Tectum
Tegmentum
Basilar

Question 4

Divisions of the Brainstem:

Integrative functions: ________, ______ centers, etc

Cranial nerves and nuclei: ____ out of the 12 pairs

Answer 4

consciousness
vital centers
9

Question 5

Junction between the midbrain and diencephalon:

Conduit Function:
Lobes involved: ______/________, and ______

______, ________, and ________ lemnisci synapse with neurons in the thalamic nuclei

Answer 5

parietal, temporal, occipital

spinal, trigeminal, medial

Question 6

The _______ limb of the internal capsule contains fibers that pass from the lateral ______ nuclei to the frontal lobe

Answer 6

ANT
thalamic

Question 7

Junction between the midbrain and diencephalon:

____________ cortical cross talks with the cerebellum

Answer 7

frontal

Question 8

The corticospinal tract is made up of the _______ _______ and ______ ______ for motor control

Answer 8

cerebral cortex; spinal cord

Question 9

Junction between the midbrain and diencephalon:

Cerebral peduncle has _______ tracts

Answer 9

descending

Question 10

Junction between the midbrain and diencephalon (Conduit functions)

Answer 10

Question 11

Junction between the midbrain and diencephalon:

Integrated Functions:
riMLF: _________ __________ nucleus of _________ __________ _________

________ ________ center: moves our eyes up and down and is the centre for ________ gaze

Answer 11

rostral interstitial medial longitudinal fasciculus

vertical gaze

upward

Question 12

Junction between the midbrain and diencephalon:
The red nucleus is the ________ ________ system

Answer 12

UMN control

Question 13

Junction between the midbrain and diencephalon:

Integrated Functions
Substantia nigra pars compacta- ______ ___________ except eyes

Answer 13

somatic motor

Question 14

Junction between the midbrain and diencephalon (Integrated functions)

Answer 14

Question 15

Parkinson’s Disease involves the degeneration of what structure?

Answer 15

Substania Nigra

Question 16

With Parkinson’s, the neurons die and lose their _______ and there is a lack of _______

Answer 16

color; dopamine

Question 17

A patient who suffers from a left MCA stroke can speak fluently but meaningless to your question. Which type of aphasia is this? Where is the lesion most likely located?

Answer 17

Fluent or Conduction Aphasia
Arcuate Fasciculus or Wernicke’s Area

Question 18

In the Rostral Midbrain at the superior colliculus level involving the integrated functions, the PAG structure does what?

Answer 18

controls our perception of pain

Question 19

Which CNs have their nuclei on the pons?

Answer 19

V, VI, VII, VIII

Question 20

CN II starts at the _______ but gets out at the ______ part of the brain

Answer 20

tegmentum
basilar

Question 21

VTA in rostral midbrain at the superior colliculus level is for ______ and ________

Answer 21

reward and aversion

Question 22

CN III is sympathetic or parasympathetic?

It has two functional components:
1.
2.

Answer 22

parasympathetic

somatic motor
visceral motor

Question 23

Rostral Midbrain at the Superior Colliculus Level
( Conduit functions)

Answer 23

Question 24

Rostral Midbrain at the Superior Colliculus Level
( Integrated functions)

Answer 24

Question 25

Rostral Midbrain at the Superior Colliculus Level ( Decussation)

Answer 25

Question 26

Caudal midbrain: inferior colliculus level (conduit functions)

Answer 26

Question 27

Caudal midbrain: inferior colliculus level (integrated functions)

Answer 27

Question 28

Middle/caudal medulla: Sensory Decussation __________ __________ _____: decussation in the spinal cord

Answer 28

Anterolateral spinothalmic tract

Question 29

Middle/caudal medulla: Sensory Decussation _______ ________ ________ ________: decussation in the caudal medulla

Answer 29

Dorsal column medial lemniscus

Question 30

Label this

Answer 30

Middle/caudal Sensory

Question 31

Caudal medulla: Motor Decussation ____________/__________ _____: for cranial motor functions

Answer 31

corticobulbar/corticonuclear tract

Question 32

Label this (integrated functions)

Answer 32

Question 33

What is this section?

Answer 33

Caudal Medulla Motor

Question 34

Caudal medulla: Motor Decussation Corticospinal tract ____-_____% decussation 10-30% - ________ ________ corticapsinal tract - _________ corticospinal tract

Answer 34

70-90% Ipsilateral lateral Anterior

Question 35

Integrated functions of brainstem: Reticular Formation - The ascending reticular activating system: ________ and _______ - Descending spinal tract: _______ _______

Answer 35

Arousal; alert motor control

Question 36

What is this?

Answer 36

Vital centers

Question 37

Which ascending sensory and descending motor tracts decussate in the medulla? ____________ ___________ peduncle from contralateral _________ _________ lemniscus _____-_______% corticospinal tract

Answer 37

Inferior cerebellar olive medial 70; 90

Question 38

Label this (decussation)

Answer 38

Question 39

Label this (integrated functions)

Answer 39

Question 40

Label this (conduit function and cranial nerve/nuclei)

Answer 40

Question 41

Label this ( integrated function)

Answer 41

Question 42

Label this

Answer 42

Question 43

Label this (conduit/CN and nuclei)

Answer 43

Question 44

Label this

Answer 44

Question 45

Caudal pons (conduit/CN and nuclei)

Answer 45