Lecture 4- Brainstem Flashcards
Which cranial nerves have their nuclei in the midbrain? In the pons? And in the medulla oblongata?
Midbrain: CN III, IV, V
Pons: CN V, VI, VII, VIII
Medulla: CN V, IX, X, XII
Fill this out
Divisions of the Brainstem:
________: only in the midbrain
________: ascending tracts
_________: descending tracts
Tectum
Tegmentum
Basilar
Divisions of the Brainstem:
Integrative functions: ________, ______ centers, etc
Cranial nerves and nuclei: ____ out of the 12 pairs
consciousness
vital centers
9
Junction between the midbrain and diencephalon:
Conduit Function:
Lobes involved: ______/________, and ______
______, ________, and ________ lemnisci synapse with neurons in the thalamic nuclei
parietal, temporal, occipital
spinal, trigeminal, medial
The _______ limb of the internal capsule contains fibers that pass from the lateral ______ nuclei to the frontal lobe
ANT
thalamic
Junction between the midbrain and diencephalon:
____________ cortical cross talks with the cerebellum
frontal
The corticospinal tract is made up of the _______ _______ and ______ ______ for motor control
cerebral cortex; spinal cord
Junction between the midbrain and diencephalon:
Cerebral peduncle has _______ tracts
descending
Junction between the midbrain and diencephalon (Conduit functions)
Junction between the midbrain and diencephalon:
Integrated Functions:
riMLF: _________ __________ nucleus of _________ __________ _________
________ ________ center: moves our eyes up and down and is the centre for ________ gaze
rostral interstitial medial longitudinal fasciculus
vertical gaze
upward
Junction between the midbrain and diencephalon:
The red nucleus is the ________ ________ system
UMN control
Junction between the midbrain and diencephalon:
Integrated Functions
Substantia nigra pars compacta- ______ ___________ except eyes
somatic motor
Junction between the midbrain and diencephalon (Integrated functions)
Parkinson’s Disease involves the degeneration of what structure?
Substania Nigra
With Parkinson’s, the neurons die and lose their _______ and there is a lack of _______
color; dopamine
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?
Fluent or Conduction Aphasia
Arcuate Fasciculus or Wernicke’s Area
In the Rostral Midbrain at the superior colliculus level involving the integrated functions, the PAG structure does what?
controls our perception of pain
Which CNs have their nuclei on the pons?
V, VI, VII, VIII
CN II starts at the _______ but gets out at the ______ part of the brain
tegmentum
basilar
VTA in rostral midbrain at the superior colliculus level is for ______ and ________
reward and aversion
CN III is sympathetic or parasympathetic?
It has two functional components:
1.
2.
parasympathetic
somatic motor
visceral motor
Rostral Midbrain at the Superior Colliculus Level
( Conduit functions)
Rostral Midbrain at the Superior Colliculus Level
( Integrated functions)
Rostral Midbrain at the Superior Colliculus Level
( Decussation)
Caudal midbrain: inferior colliculus level
(conduit functions)
Caudal midbrain: inferior colliculus level
(integrated functions)
Middle/caudal medulla: Sensory Decussation
__________ __________ _____: decussation in the spinal cord
Anterolateral spinothalmic tract
Middle/caudal medulla: Sensory Decussation
_______ ________ ________ ________: decussation in the caudal medulla
Dorsal column medial lemniscus
Label this
Middle/caudal
Sensory
Caudal medulla: Motor Decussation
____________/__________ _____: for cranial motor functions
corticobulbar/corticonuclear tract
Label this
(integrated functions)
What is this section?
Caudal Medulla
Motor
Caudal medulla: Motor Decussation
Corticospinal tract
____-_____% decussation
10-30%
- ________ ________ corticapsinal tract
- _________ corticospinal tract
70-90%
Ipsilateral lateral
Anterior
Integrated functions of brainstem: Reticular Formation
- The ascending reticular activating system: ________ and _______
- Descending spinal tract: _______ _______
Arousal; alert
motor control
What is this?
Vital centers
Which ascending sensory and descending motor tracts decussate in the medulla?
____________ ___________ peduncle from contralateral _________
_________ lemniscus
_____-_______% corticospinal tract
Inferior cerebellar
olive
medial
70; 90
Label this
(decussation)
Label this
(integrated functions)
Label this
(conduit function and cranial nerve/nuclei)
Label this
( integrated function)
Label this
Label this
(conduit/CN and nuclei)
Label this
Caudal pons
(conduit/CN and nuclei)
