week 8 : perfusion Flashcards
true or false. Cerebrum has a left and right hemisphere ?
yes this is true
name the different parts of the brain :
first one is frontal lobe : name the function, now name the rest
frontal lobe is in charge of our decision making, voluntary motor activity , speaking, reasoning, emotional traits
parietal lobe : is in charge of knowing left from right, sensation, body orientation, reading
occipital lobe : vision, color perception
cerebellum : fine muscle control, balance, coordination and control of voluntary movement
brain stem : in charge of breathing, body temperature, alertness/sleep / swallow
temp lobe: understanding language, behaviour, memory , hearing
what is this describing : this is processing of information on the opposite side of the body
contralateral processing
Recall we have a right and left hemisphere: sensory and motor functions are controlled by opposite sides of the brain. Is this true or false?
this is true
A brain injury on one side of the brain, a lesion or an area of hypoxia or a stroke will affect movement on the opposite side of the body : what is this describing ?
contralateral processing
recall from the diagram : the right hemisphere, the right side of the brain, which is in geay is going to receive visual input from which side of the brain?
from the left side of the brain division in both eyes
true or false. recall from the slide : left hemisphere, which is in pink, is going to receive visual input from the right field division in one eye
false, both eyes
why does left side receive an input from the right side , and vice versa?
because they are going to cross over in that optics
give an example of contralateral processing
if someone as a brain injury on the right side of their brain will affect their left field division in both eyes and vice versa.
what is important when we are talking abt brain damage ? what type of processing?
contralateral processing
what is cerebellum?
controls fine motor movement, balance, allows brain to determine limb movment
what is this describing : fine details help us become more precise with our movements and helps us with our coordination
cerebellum
what is essential for life ? although every function is vital, what is the most vital amongst all of them ?
brain stem
what is the brain stem ?
controls breathing, heart rate ; blood pressure and alertness
what is important for emergencies , for example when some has intracranial pressure and when someone goes into a coma u wanna start worrying if this specific part of the brain is involved ?
brain stem
name the functions of cerebrum : that includes frontal lobe, temp lobe, brain stem, parietal lobe, occipital lobe, cerebellum
frontal :
- problem solving
emotional traits
reasoning
speaking
voluntary motor activity
parietal :
- knowing right to left
sensation
reading
body orientation
occipital lobe
- vision
color perception
cerebellum
- balance
coordination and control of voluntary movement
brain stem
- breathing
body temp
digestion
alertness/sleep
swallowing
temp lobe
- understanding language
behavior
memory
hearing
what is this describing : relay sensory impulses or sensation from parts of the body to the cerebral cortex where those impulses can then interpreted
this is describing thalamus
where do most emboli originate?
endocardium - breaks off and travels and lodge in the cerebral circulation
what is embolic stroke commonly associated with?
valvular heart disease, MI, infective endocarditis (inflammation of the endocardium, clumps of bacteria to form), rheumatic heart disease, congenital heart defects and a fib
what is a thalamus job?
main function is to relay sensory impulses or sensation from parts of the body to the cerebral cortex where those impulses can then be interpreted.
which one has more warning signs, embolic or thrombotic?
thrombotic
true or false. the thalamus sorts the info and passes it into the cerebral cortex where it can initiate and coordinate movement to response to the sensations.
true
what is this describing: sudden onset, body does not have time to accommodate by developing collaterals
embolic stroke
what is atherosclerosis?
ardening and thickening of arteries (Carotid Stenosis)
hypothalamus what is the job of it ?
controls heart rate, bladder contraction and passage of food
how does atherosclerosis connect to the brain?
not enough blood flow to the brain due to narrowing or occlusion
what is this? Characterized by deposits of lipids within intima of artery
Atherosclerosis
what stimulates smooth muscle lining the intestine, stomach, blood vessels as well as receive sensory impulses
hypothalamus
what are the four stages of atherosclerosis?
damaged endothelium, fatty streaks, fibrous plaque, complicated lesion
name another job that the hypothalamus do ?
stimulates smooth muscle lining the intestine, stomach, blood vessels as well as receive sensory impulses
what is a hemorrhagic stroke?
15% of strokes, results from bleeding
ten out of the 12 cranial nerves come from where ? which connects to the the cerebrum to the spinal cord`
brain stem, critical for regulating the cardaic, resp function, sleepcycle, and important to sustain life
what are the two subtypes of strokes?
Intracerebral hemorrhage Subarachnoid hemorrhage
true or false abt hemorrhagic stroke: when someoen has bleeding in the brain, brain tissue becomes compressed and diplaced - this causes ischemia, increased pressure and necrosis
true
what is intracerebral hemorrhage?
Bleeding within brain caused by a ruptured vessel
* Usually associated with hypertension and arterio-venous malformations
* Usually occurs during periods of activity
brain stem also provides _____ and sensory nerve to supply to ____ and the neck
motor function, face
this is important in critically neurologic patients ( see changes to heart rate, ability to temp regulate )
brain stem
what is Intracerebral hemorrhage associated with?
symptoms of ICP
what is this describing: “worst headache of my life”, Sudden onset of symptoms with progression over minutes and hours
ntracerebral Hemorrhage
what is subarachnoid hemorrhage?
Intracranial bleeding into space between pia mater and arachnoid layers, much more common
true or false. hypothalamus is important in controlling body temp, promote heat loss when needed, or sweat when we are trying to lower down our temp . Shivering and etc.
true
between the cns and the endocrine , hypothalamus is also connected , recall what this means
changes in the body and stimulating various organs and glands to release hormones
these are cavities within the brain that are filled with cerebral spinal fluid
ventricles
we also use ___ analysis to diagnose various disease
Cerebrospinal fluid
what is subarachnoid hemorrhage commonly associated with?
ruptured aneurysm
what gender is subarachnoid hemorrhage common in?
women
true or false: Brain aneurysms are considered “silent killers” because there are usually no warning signs until they rupture
true
what is the difference between hematoma and hemorrhage?
Hemorrhage – active bleed
Hematoma – bleed that has already clotted (this leaves a large clot)
what are the general risk factors for a stroke? (very similar to CAD risks)
Age
* Genetics
* Ethnicity
* Hypertension
* Dyslipidemia
* Tobacco use
* Diabetes
* Obesity
* Elevated levels of stress
* Substance abuse
* Alcohol
* Arteriovenous malformations
* Medications (anticoagulants, antiplatelet)
* Atrial fibrillation
* Valvular heart disease
* Sedentary
* Birth Control pills/Hormone replacement therapy/pregnancy
* TIA (transient ischemic attack)
what are the clinical manifestations of acute stroke ?
Sudden numbness/weakness in the
face, arm, or leg on one side of the body
* Sudden confusion
* Difficulty speaking, slurring speech
* Sudden trouble seeing
* Sudden trouble walking, dizziness, loss of balance
* Sudden severe headache
right brain damage..
paralyzed left side - hemiplegia
left side neglect
spatial-perceptual deficits
tends to deny or minimize probems
rapid performance, short attention span
impulsive,, impaired judgement impaired time concepts
left side damage.
paralyzed on right side
impaired speech (aphasia)
impaired right left discrimination
slow performance, cautious
aware of deficits - depression anxiety
impaired comprehension related to language - math
what are the Clini manis of high intracranial pressure (hemorrhage)
Headache, Vomiting, Change in Level of consciousness, Pupil changes, Posturing, Seizures
clini mani’s of deficits (this is whats going to happen to the patients)
- Related to location of stroke
- Ischemic and hemorrhagic strokes have similar manifestations
- Functions affected are directly related to artery involved and area it supplies
- Motor Function
- Communication
- Affect
- Intellectual Function
- Spatial-Perceptual
Alterations - Elimination
what is CSF
is a clear colorless fluid that circulate with the subarachnoid space, it provides cushioning for the brain and spinal cord
true or false. CSF is not continually formed , hwoever there are factors that influence the rate of absorption and formation
false, it is continually formed.
what are the 3 protective laters that surronding the brain and spinal cord called
meninges
1) dura mater
2. arachnoid
3) pia mater
this comes from greek word membrane
meninges
what is dura mater
outer most layer closest to the skull
what is arachnoid
this is the middle layer within that meninges