MS Flashcards
explain multiple sclerosis
progressive immune mediated disease of CNS that results in demyelination, oligodendrocyte loss, and axon degeneration.
explain gliosis
result from proliferation/damage of neuro tissue w/i CNS that results in glial scars seen on MRI
white matter is affected early in disease with damage to ____ and grey matter is effected later in the disease causing damage to ____ and ____
axons; cell bodies + dendrites
explain the “outside-in model” theory of MS
immune cells circulating enter the BBB and attack oligodendrocytes/myelin
explain the “Inside-out model” theory of MS
Damage to brain/oligodendrocytes triggers immune cells that pass thru BBB and cause further damage
as MS progressess, demyelinated areas get filled with ____ and form plaques
astrocytes
4 main areas that MS damage occurs
Optic N
periventricular white matter
spinal cord
cerebellar peduncles
Loss of temporary vision, dull ache behind eye, and blurry vision indicate
optic neuritis
explain dissemination in space and time
dissemination in space:
- lesions in multiple areas on 1 MRI
dissemination in time
- lesions seen in MRI after original scan where they were not previously seen
CSF fluid is tested for what that indicates MS?
elevated IGg
found in 90-95% of pts
difference between benign and malignant MS
benign: full function 15yrs after initial diagnosis (better prognosis)
Malignant: rapid onset + progression w. death within few years
this subtype of MS indicates active or not active MS with 1st episode of inflamm/demyelination in CNS that could become MS
Clinically isolated Syndrome (CIS)
this is the most common MS subtype and pt presents w. discrete attacks followed by no sign of disease progression and complete return to function
Relapsing Remitting MS (RRMS)
this subtype of MS presents as near continuous decline with function progressively worsening w.o distinct attacks
primary progressive MS
(PPMS)
this subtype of MS starts w. RRMS followed by consistent progression as disease advances with irreversible decline in fucntion
SPMS: secondary progressive MS
Can full remission occur in SPMS?
Nope
exacerbation or relapse lasts ____
> 24hrs
what 3 things are factors that can cause exacerbation?
viral/bacterial infx, asthma attack or other disease
heat
stress
Pseudo exacerbation is the temporary worsening of symptoms that last ____
<24hrs
what is Uthoff’s symptom and what causes it?
adverse reaction to heat that resolves w. cooling
caused by excessive external heat, fever, or prolonged exercise
what type of sensory changes occur in pts with MS? (3)
intense sharp pain and numbness and chrnoic pain (~80%)
tic douloreux (trigeminal neuralgia)
vision changes
whats lhermitte’s sign?
electric shock like sensation during flexion of head
what type of vision changes can patient experience?
5
optic neuritis
scotoma
marcus Gunn Pupil
nystagmus
diplopia
marcus Gunn Pupil
shine light in eye and both eyes dilute