NEURO - Epilepsy, MS + Parkinsons Flashcards
Def Syncope
Transient LOC due to cerebral hypoperfusion
What are the 3 main types of syncope
Vaso-vagal
Postural HoTN
Post-prandial HoTN
What is Vasovagal syncope
Fainting due to a sudden reflex bradycardia and peripheral vasodilation
What is vasovagal syncope in response to? (4)
Standing
Fear
Venesection
Pain
LOC time vasovagal syncope
<2mins
Recovery - vasovagal syncope
Rapid
Mx vasovagal syncope
None req
What is postural HoTN
Drop in SBP by >2-+ on standing
Ix postural HoTN
Measure sitting + standing BP at 1,5,10mins
What is post-prandial HoTN
Drop in 20+ SBP after eating
B/c pooling blood in splanchnic vasculature
Other types of syncope (4)
Carotid sinus
Anaemia
Micturition
Exertion
Ix recurrent syncope (5)
Bloods - FBC/U+E/glucose Lying/standing BP ECG/24h tape EEG CT head
Advise to pt w/ recurrent syncope pre-Ix
NO DRIVING until cause is found
Classic features of a generalised seizure (4)
Aura
LOC
Tonic/Clonic
Post ictal phase (drowsiness)
Def focal seizure
Originating from within the networks of 1 hemisphere
Do you lose consciousness in a simple focal seizure?
No
Types of generalised seizures (6)
Abscence TC Clonic Tonic Myoclonic Atonic
Temporal seizure classic Sx
LIp smacking/chewing
Frontal seizure classic Sx
MOtor movements
Speech
Parietal seizure classic Sx
Sensory changes
Occipital seizure classic changes
Vision changes
What is Todds paresis?
Temporary paralysis of affected limb, post focal seizure
Causes of seizures (7)
Idiopathic mostly Cerebrovascular Head injury CNS infection SOL Neurodegen disease Metabolic - GI/Na/K
Anti-epileptics - 1st line for generalised
Na valporate
Anti-epileptics - 2nd line for generalised
Lamotrigine
Anti-epileptics - 1st line for absence seizures
Ethosuximide
Anti-epileptics - 1st line for focal seizures (2)
Carbamazepine
Lamotrigine
Mode of action - Na valporate
Potentiates GABA
Blocks NA channels
SE Na Valporate (5)
Rash Sedation Weight gain Hair loss Tremor
Who cannot take Na Valporate (3)
Pregnant F
Thrombocytopenia
Liver damage
Mode of action - Lamotrigine
Blocks Na channel
What is there a risk of when taking Lamotrigine?
BM toxicity
Mode of action carbamazepine
Na channel blocker
SE carbamazepine (4)
Rash
Dizzy
Double vision
AGRANULOCYTOSIS
drug interactions carbamazepine
P450 pathway
Inducer
SE Phenytoin (2)
Gum hypertrophy
Nystagmus
Why must phenytoin be monitored?
Zero order kinetics :/
Which medication must be prescribed in caution w/ phenytoin
COC
can lead to failure of COC as is enzyme inducer
Driving rules (CAR) - epileptic
Can’t drive
After 1 y can reapply for licence
This is 10 years for a lorry driver
Driving rules (CAR) - 1st unprovoked seizure
No driving for 6 months at least
Driving rules (CAR) - provoked seizure
Epilepsy regulations apply
Possible exemption if seizure @ time of head injury
Def MS
Relapsing episodes of immunologically mediated demyelination of CNS –> neuro degeneration
M:F MS
1:2
Classic age of onset MS
200-45
What is the genetic predisposition to MS
HLA-DR2
Where are areas of demyelination classically seen in MS? (5)
Optic nn Angles of lateral ventricles cerebellar peduncles Brainstem Dorsal/CCS tracts
What are the 3 patterns of MS
Primary progressive MS (10-20%)
Relapsing/remitting MS (80%)
Fulminating MS (<10%)
Features of primary progressive MS
No clear cut relapses/remissions
When is primary progressive MS diagnosed?
If progressive deterioration for >1y
Features of relapsing/remitting MS
Initial eps resolve completely
Subsequent events –> residual disability
Eventually develops 2’ progressive MS
Features fulminating MS
Debilitating progressive deterioration from early stage
Optic Sx MS
Optic neuritis: > Sudden painful LOV > Loss colour vision (esp red) > Swollen optic disc > Diplopia
UMN Sx MS
CCS
–> hemi/monoparesis
Sensory Sx MS
Dorsal tract
Paresthesia
Proprioceptive loss
Cerebellar Sx MS
Intention tremor
Nystagmus
What is Uthoff’s phenomenon
Sx of MS being worse in the head
1’ care Ix MS
FBC U+E LFT ESR TFT Glucose Ca B12 HIV
2’ care Ix MS
MRI
CSF
Visual evoked response
MRI features MS
> 10 plaques visible
CSF features MS
Incr cell count
Incr protein
Oligoclonal IgG bands present
Visual evoked response features - MS
Delayed EEG reaction in occipital lobe to visual stimuli
DDx - R/R MS (3)
TIA
SLE
CNS sarcoid
DDx - 1’ progressive MS (3)
MND
CNS mass
Parkinsons/HD
Mx - acute relapse MS
Ix - rule out other cause
High dose CCS: PO methylprednisolone 0.5mg/day for 5 days
How long does it take for an acute MS relapse episode to recover
2-3 months
LT Mx MS
MDT + annual review
Lifestyle
UTI will exaccerbate
Dimethyl fumuarate/teriflunomide - R/R
Mx R/R MS if severe (2+ relapses in 1 y)
Natalizumab
Complications MS (8)
Fatigue Spasticity Ataxia/tremor Mobility Bladder dysfunction Sexual dysfunction Pressure sores Depression
LE MS
20-30 y
Poor prognostic factors MS (3)
Incr age of PS
Early cerebellar involvement
Loss mental fct
Mx fatigue in MS
Amantadine + CBT
Mx spasticity in MS
Baclofen + physio
Botox injection
Mx bladder dysfunction in MS
Oxybutynin/toleridine
If >100ml - int self-catheterisation
Anatomical changes - Parkinsons
Degeneration of the SN pars compacta
–> Decreased dopamine activity
Features Parkinsons - BRIT WGM
Bradykinesia Rigidity Instability Tremor Writing (micro) Gait Mask face
Classic triad Parkinsons disease
Bradykinesia
Rigidity
Tremor
Def Bradykinesia
Progressive reduction in speed/amplitude
Def rigidity
Increased tone throughout range of movements
‘lead pipe/cog wheeling’
Rigidity vs spasticity
Rigidity = increased tone w/ tremor
Spasticity - velocity dependent
What type of tremor typically do pt w/ PD get
Pill rolling
Occurring at rest + w/ movement
Gait changes PD
Festinant shuffle
Decreased arm swing
Turning hesitation/freezing
Speech changes PD
Monotonous pronunciation
Non-motor features PD (4)
GI - dysphagia/constipation/urinary freq
Vivid dreams
Depression
Cognition/dementia
Causes Parksinsons disease (4)
Idiopathic
Dx - neuroepileptics/anti-psychotics
Vascular
Toxin - Wilsons
What is Parkinsons plus syndrome (3)
Progressive supranuclear palsy
Multiple system atrophy
Lewy body dementia
Features of supranuclear palsy PD +(3)
Symmetrical onset
Postural instability/sleep problems
Limitation in movement down gaze
Features of multiple system atrophy PD+ (3)
Autonomic - postural HOTN, bladder dysfunction, sweating Cerebellar sins Pyramidal signs (incr plantars/hyperreflexia)
5 main sets of Meds used in PD Tx
Levodopa/Carbidopa DA receptor agonists - ropinirole/bromocriptine/cabergoline MAOI Anticholinergics (tremor) COMT inhibitors - entacapone/tolcapone
Levodopa effects - motor Sx:
> improvement in motor Sx
Levodopa effects - ADL
> improvement in ADLs
Levodopa effects - motor complications
> motor complications
Levodopa - adverse events
< specified adverse events
DA agonists - motor Sx
< improvement in motor Sx
DA agonists - ADLs
< improvement on ADLs
DA agonists - Motor complications
< motor complications
DA agonists - adverse effects
> specified adverse events
MAO-B-I - motor Sx
< improvement in motor Sx
MAO-B-I - ADLs
< improvements in ADLs
MAO-B-I - motor complications
< motor complications
MAO-B-I - adverse events
< specified adverse events