Neuro Flashcards
Type of speech difficulty in MG
dysarthria
difference in MS and MG face palsy
MS = pseudobulbar palsy (UMN, spastic tongue, no wasting) MG = bulbar palsy (LMN, wasted tongue, absent reflexes)
MG tests
tensilon test
CT upper thorax for thymoma/thymic hyperplasia
ACh receptor antibodies
TFTs
Ice-pack cooling to affected eyelid resolves ptosis
EMG tests
what is myasthenic crisis?
muscle weakness leading to respiratory failure
worsened by anaesthetic and certain drugs (tetracycline)
what are you worried about after tensilon tests?
when drug wears off it can precipitate a myasthenic crisis
treatments for MG
steroids azathioprine ACh-esterase inhibitors (rivastigmine) IVIG/plasmaphoresis for crisis thymectomy
symptoms of giant cell arteritis
frontal headache pain on palpation pain brushing hair jaw claudication on eating visual loss
symptoms of trigeminal neuralgia
intermittent sharp pain
in mandibular/maxillary distribution
worse on eating but episodic and severe
physical examination of giant cell arteritis
temporal tenderness
palpable thickened temporal artery
visual loss
3 tests for giant cell arteritis
ESR
temporal artery biopsy
USS temporal artery
initial treatment of Giant Cell arteritis
high dose steroids (IV if visual problems) until symptoms resolve
commence osteoporosis prophylaxis
associated condition with giant cell arteritis
polymyalgia rheumatica
sensitivity of CT head on SAH
> 95 if done within 6h
signs of SAH on LP
xanthochromia if within 4h
what is Lhermitte’s sign
tingling of limbs on neck flexion in MS/cervical spondylosis
investigations for MS
LP
MRI brain/cord
features of demyelination
IgG oligoclonal bands in CSF
clinical features
MRI features don’t corelate to severity of disease (T2 hyperintense lesions)
most common feature in MS
headache
epidemiology of MS
F>M
M do worse and more likely to have primary progressive course
worsened by heat, but more common in colder climates
Treatment for MS
Bolus pred to shorten relapse
Beta interferon reduces frequency of relapse
baclofen for spasticity
GBS weakness distribution
Starts distal, gets proximal
Respiratory failure type in GBS
Type 2 (CO2 rises early and O2 falls later)
what FVC would indicate imiment respiratory failure
<1.5L with >30% drop lying flat
how does inclusion body myositis present
> 50y
slow progressive weakness of proximal and distal muscles, mimicking MND
pattern for MND
LMN and UMN signs
dysphagia/dysarthria
respiratory involvement
normal sensation
how to confirm MND
EMG/Nerve Conduction Studies
medication for MND
riluzole - doesn’t improve symptoms but slows progression