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What location of brain hemorrhage is frequently seen in
brain contusion or injury to major blood vessels at base of
brain? - Answers-subarachnoid.
The ____ and _____ contain the reticular activating
system which is responsible for ____. - Answers-midbrain
and upper pons
state of alertness
What important function resides in the medulla? -
Answers-cardiorespiratory centers.
What important functions are in the following brain
segments:
1. left hemisphere:
2. frontal lobe:
3. parietal lobe:
4. temporal: - Answers-1. left hemisphere: language center
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2. frontal lobe: executive function, emotions, motor
3. parietal lobe: sensory function/spatial orientation
4. temporal: memory functions
What divides the brain into supratentorial and infratentorial
compartments? - Answers-tentorium cerebelli. (tent over
cerebellum)
What is the physiology behind a blown pupil? - Answers-
blown pupil: dilation of pupil
-CN III runs along the tentorium cerebelli. parasympathetic
fibers that constrict the pupil run along CN III (oculomotor).
When temporal lobe is herniated, it can compress these
fibers. Unapposed sympathetic activity causes pupillary
dilation.
What is the tentorial notch/hiatus - Answers-this is where
the midbrain passes through into the infratentorial
compartment.
what part of the brain most commonly herniates through
the tentorial notch? - Answers-Uncus (medial part of
temporal lobe)
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does weakness occur on the same or opposite side of the
uncal herniation? - Answers-OPPOSITE. the corticospinal
tract of the midbrain is compressed and then crosses at
the foramen magnum.
state: Ipsilateral/contralateral
____ pupillary dilation associated with _____ hemiparesis
is the classic sign of uncial herniation. - Answers-ipsi
contra
average ICP is _____ mmHg. - Answers-10
The monro-kellie doctrine states that the total volume of
intracranial contents must remain constant, because the
cranium is ___ - Answers-a rigid, non expandable
container.