Nervous system: Brain stem + Cerebellum Flashcards
Medulla oblongota 1-7
What are pyramids in the brain?
bilateral ridges on anterior side of the brain
Medulla oblongota
What are the pyramids composed of?
axons?
descending voluntary motor axons, most axons cross
Medulla oblongota
what percent does each side of the brain control?
80%
different centers in the autonomic nervous system
cardiac center
apart of ANS
Medulla oblongota
regulates heart rate
Medulla oblongota
vasmotor center
apart of ANS
regulates blood pressure by constricitng and dialating arterioles
Medulla oblongota
respiratory center
apart of ANS
regulates breathing
CSF filled?, where can it be found?, continous?
desribe the inferior part of the 4th ventricle
Medulla oblongota
CSf filled space found in the pons and medulla it is continous with central canal of spinal cord
Axons?
what is the pons composed of?
Pons
groups of axons (axon tracts)
Pons
respiratory center
in pons
works with the respiratory center in the medulla
Mesencephalon
corpora quadrigemina
the four colliculi—two inferior, two superior—located on the tectum of the dorsal aspect of the midbrain.
Mesencephalon
superior colliculi
visual or auditory?
visual reflex centers for coordinating head movements with what the eye is seeing
Mesencephalon
inferior colliculi
visual or auditory?
auditory reflex centers for coordinating head movements with what is being heard
Mesencephalon
cerebral peduncles
groups of axons on ventral side of the midbrain
Mesencephalon
what does mesencephalic cerebral aquaduct connect?
3rd ventricle to the 4th
cerebellum
what does the inferior cerebellar peduncles connect?
(not apart of brain stem)
connects medulla to the cerebellum
cerebellum
what does the middle cerebellar peduncles connect?
connects pons to cerebellum
cerebellum
what does the superior cerebellar peduncles connect?
connetcs midbrain and the cerebellum
sarah balances
What is the function of the cerellum
cerebellum
1) coordinates and fine tunes voluntary skeletal muscle movement
2) helps maintain balance and posture
3) stores memory of previous learned movements pattern
cranial meninges
dura mater
outermost layer
cranial meninges
arachnoid mater
middle layer
cranial meninges
subaracnoid space
contains CSF
cranial meninges
pia mater
innermost layer
CSF production/circulation
what does CSF provide?
1) provides buoyancy and protection (liquid cushion)
2) helps maintain the chemical envoirment
CSF production/circulation
where is the CSF made?
in the ventricles of the brain
CSF production/circulation
Step 1
cerebral hemisphere/ cerebrum
CSF production/circulation
step 2
interventricular foramina
CSF production/circulation
step 3
mesenphalic aquaduct
CSF production/circulation
step 4
1/2 pons and 1/2 medulla
CSF production/circulation
step 5
straight down
central canal
CSF production/circulation
step 6
to the side (SAS)
subarachnoid space
CSF production/circulation
step 7
(AV)
arachnoid villi
CSF production/circulation
step 8
(DVS)
dural venous sinus
