Neuro Flashcards
3 of the main epilepsy subtypes
(a) Focal (partial) seizures - one side of brain
- focal aware (simple partial)
- focal impaired awareness (complex partial)
- motor - Jacksonian march
- non-motor - deja vu, aura
(b) Generalised seizures - both sides of brain
- all of these have LOC
- motor - tonic clonic
- non-motor - absence
(c) Focal to bilateral seizures - on one side of brain and spreads to both lobes
Treatment for typical (petit mal) absence seizures
Onset 4-8years
1st line: ethosuximide
2nd line: sodium valproate (or lamotrigine/ levetiracetam if child bearing age)
Treatment for generalised tonic-clonic seizures, myoclonic, tonic/atonic seizures
Sodium valproate
Child bearing women are likely to have: lamotrigine or levetiracetam
Treatment for focal seizures
1st line: lamotrigine or levetiracetam
2nd line: carbamazepine, oxcarbazepine or zonisamide
What anti-epileptic medication can exacerbate absence seizures
Carbamazepine
n.b. carbamazepine is used to treat partial seizures, trigeminal neuralgia and bipolar disorder
Anti-epileptic that is associated with:
(a) neural tube defects
(b) cleft palate
(a) sodium valproate
(b) phenytoin
For women with epilepsy, if a COCP is chosen, it should contain a minimum of how much ethinylestradiol
30 µg
For women taking phenytoin, carbamazepine, barbiturates, primidone, topiramate, oxcarbazepine, which contraceptives are UKMEC 1-3?
UKMEC 3: COCP, POP
UKMEC 2: implant
UKMEC 1: Depo-provera, IUD, IUS
For lamotrigine, which contraceptives are UKMEC 3 and UKMEC 1?
UKMEC 3: COCP
UKMEC 1: POP, implant, Depo-Provera, IUD, IUS
Medications that worsen seizure control are alcohol, drugs, theo/aminophylline, bupropion, methlpenidate, mefanamic acid.
What 2 antibiotics can worsen seizure control in patients with epilepsy?
ciprofloxacin
levofloxacin
Infantile spasms, or West syndrome, is a type of childhood epilepsy which typically presents in the first 4-8 months of life in M>F.
Prognosis is poor but what is the management?
1st line = vigabatrin and high dose prednisolone
Donepezil (ACh-esterase inhibitor) side effects
Sleep disorders - insomnia
Bradycardia
What are the most important anti-epileptic drugs to prescribe by brand
Phenytoin
Carbamazepine
Hoover’s sign
pressure is felt under paretic leg when lifting the non-paretic leg against pressure, this is due to involuntary contralateral hip extension
Lhermitte’s sign
sudden electric shock sensation that occurs when bending the head forward towards the chest in patients with multiple sclerosis
Uhthoff’s sign
multiple sclerosis where the patient’s symptoms can be worsened with heat
Treatment of cluster headaches (acute and prophylactic)
Acute:
1. 100% oxygen
2. Subcutaenous triptans
Prophylaxis:
1. Verapamil
4 main features of PTSD symptoms
- Hypervigiliance
- Flashbacks
- Avoidance
- Emotional numbing
If taking warfarin / heparin, what SSRIs should be considered
NICE guidelines recommend avoiding SSRIs and considering mirtazapine
Reed-Sternberg cells are associated with what cancer
Hodgkin’s lymphoma
What type of lyphoma has alcohol induced lymph node pain
Hodgkin’s lymphoma
What haem cancer is likely to cause:
Painless, non-tender, asymmetrical lymph nodes in the neck (cervical/supraclavicular) > axillary > inguinal
Pel-Ebstein fever
Hodgkin’s lymphoma
Depression (variable appetite, poor sleep) with excess alcohol use may benefit from which antidepressant
Mirtazapine
Difference between viral labyrinthitis vs vestibular neuronitis
viral labyrinthitis = hearing loss and tinnitus are more likely to be present in
vestibular neuronitis = only vestibular nerve is involved so hearing is fine
what medications are used as prophylaxis for contacts of patients with meningococcal meningitis
Oral ciprofloxacin or rifampicin
what is the treatment for meningitis
Initial empirical therapy aged < 3 months or >50 years
IV cefotaxime + amoxicillin (or ampicillin)
what is the treatment for meningitis
Initial empirical therapy aged 3 months - 50 years
IV cefotaxime (or ceftriaxone)
what is the treatment for meningitis
Meningococcal meningitis
IV benzylpenicillin or cefotaxime (or ceftriaxone)
what is the treatment for meningitis
Meningitis caused by Haemophilus influenzae or Pneumococcal meningitis
Intravenous cefotaxime (or ceftriaxone)
what is the treatment for meningitis caused by Listeria
IV amoxicillin or ampicillin
Conditions that cause both UMN and LMN signs
e.g. hyporeflexia (LMN) and positive Babinski sign - extensor plantars (UMN)
Motor neuron disease
Subacute combined degeneration of the cord
Friedreich’s ataxia
Syringomyelia
Taboparesis (syphilis)
Conus medullaris lesion
When are triptans taken during headache
At the onset of HEADACHE (not aura)
What is the only antiemetic that should be used in parkinson’s disease
Domperidone
For parkinsons disease patients, if postural hypotension occurs then what medication can be given
midodrine
selegiline for parkinsons disease is what type of drug
MAO-B (Monoamine Oxidase-B) inhibitor
- these inhibit breakdown of DA
What is this sign called and what neuro condition is it seen in?
Gently flicking one finger on a patient’s hand. A positive test results in reflex twitching of the other fingers on the same hand in response to the flick.
Hoffman’s sign
Seen in degenerative cervical myelopathy
And other UMN diseases e.g. MS
What is the gold standard investigation for degenerative cervical myelopathy
MRI of cervical spine
Rx: neurosurgery/ ortho spinal surgery to perform decompressive surgery
Two investigations done for Guillain barre syndrome
- Lumbar puncture - high protein, normal WCC (albuminocytologic dissociation)
- Nerve conduction studies - decreased motor nerve conduction velocity, increased F wave and distal motor latency
Sodium valproate effects on P450 system
INHIBITOR of the P450 system
Suspected TIA in the past 7 days requires an urgent assessment by stroke doctor within how long
urgent assessment (within 24 hours) by a specialist stroke physician
(if longer than a week, then to be referred to be seen within 7 days)
According to the NICE guidelines for neuropathic pain management (2013), first-line treatment options include what 4 drugs
amitriptyline
duloxetine
gabapentin
pregabalin
these are used as monotherapy. if one is not working, switch to another.
+ tramadol for rescue therapy
+ topical capsaicin
treatment for trigeminal neuralgia
carbamazepine
Topiramate (antiepileptic with risk of foetal malformation) reduces the efficacy of which contraceptives
COCP
POP
Implant - ukmec 2
The injection and IUS are not affected
Common peroneal nerve lesion
what features
Weakness of foot dorsiflexion and eversion
Sensory loss over foot dorsum + lower lateral part of leg
Wasting of anterior tibial and peroneal muscles
Foot drop unilaterally
Bilateral foot drop / high stepping gait causes with:
Motor loss
Sensory loss
Motor loss
- GBS, Charcot Marie Tooth, porphyria
Sensory loss
- Diabetes, uraemia, vit B12 def, alcoholism, amyloidosis, leprosy
Treatment for myasthenia gravis (antibodies against ACh receptors)
Pyridostigmine
(ACh-esterase inhibitor)
(+ Prednisolone
+ Azathioprine/ cyclosporin, mycophenolate + thymectomy)
Management of myasthenic gravis crisis
(maintainence Rx is Pyridostigmine)
Plasmaphresis
IV Ig
What two meds are used for migraine prophylaxis
Propranolol
Topiramate - bad for foetus
Drugs that can worsen myasthenia gravis
Penicillamine
Beta blockers
Lithum
Phenytoin
Quinidine, procainamide
Antibiotics (gent, macrolites, tetreacyclines)
What 2 medications are recommended for menstrual migraine prophylaxis
frovatriptan (2.5 mg twice a day)
zolmitriptan (2.5 mg twice or three times a day)
Acutely: mefanamic acid, aspirin, paracetamol, caffeine, triptans
What happens to gastric emptying with migraine
DELAYED gastric emptying with acute migraine attacks
Two meds that are first-line for spasticity in multiple sclerosis
Baclofen
Gabapentin (also useful for oscillopsia)
Treatment for acute relapse of multiple sclerosis
oral or IV methylprednisolone
5 drug options for multiple sclerosis maintenance
- Natalizumab
- Ocrelizumab
- Fingolimod
- B-interferon
- Glatiramer acetate
Meniere’s disease triad
vertigo
tinnitus (episodic)
sensorineural hearing loss
What cranial nerves and effects occur with acoustic neuroma (vestibular schwannoma)
CN 8: vertigo, unilateral SNHL, unilateral tinnitus
CN 10: absent corneal reflex
CN 12: facial palsy
Investigation for acoustic neuroma
MRI of the cerebellopontine angle
Complex regional pain management
- Physio
- Neuropathic analgesia (amitryptilline, pregabalin, gabapentin, duloxetine)
- Pain team
Which scoring system is most appropriate to use to evaluate whether a patient has had a stroke?
ROSIER score
DVLA rules for:
1. Seizure
2. 2nd seizure
3. TIA
4. Multiple TIAs
5. Craniotomy
6. Narcoplexy/cataplexy
- 1st seizure = 6 months
- 2nd seizure =12 months
- T1A = 1 month
- Multiple TIAs = multiple months = 3 months
- CraniotomYEAR = 1 year
- NOrcoplexy / CEAtaplexy = No/cease driving (until controlled)
autonomic dysreflexia most common triggers
faecal impaction
urinary retention
occurs with Hx of traumatic spinal cord (above T6) injury, bedbound
hypertension
flushing
sweating
above the level of the cord lesion
this is called…?
autonomic dysreflexia
What is the dose of rectal diazepam for seizures in:
Simplified to:
Neonate
<12yo
>12yo
Neonate = 1.25-2.5mg
<12yo = 5mg
>12yo = 10mg-20mg
What is the dose of midazolam oromucosal solution for seizures in:
1 year
1-4 years
5-9 years
>10 years
1 year = 2.5mg
1-4 years = 5mg
5-9 years = 7.5mg
>10 years = 10mg
Tremor difference in parkinson’s versus essential
Parkinson’s disease - resting tremor, goes away on movement
Essential - no resting tremor, occurs on movement/outstretch. Can affect voice.
Essential tremor is an autosomal dominant condition which affects both upper limbs:
1. postural tremor - worse if outstretched
2. improved by alcohol and rest
3. can affect the head
Treatment of essential tremor is…?
Propanolol
Primidone
Eye deviates down and out
Ptosis
Pupil may be dilated
What palsy
CN3 palsy
(same side CN lesion as the eye down and out)
Absence seizures - good prognosis: what percentage become seizure free in adolescence
90-95%
absence seizures are also called
petit mal
Rx sodium valproate and ethosuximide
Does a lower motor neurone facial nerve palsy (Bell’s palsy) affect the forehead or spare the forehead
LMN lesion AFFECTS the forehead (as facial nerve innervating both forehead and face sits more peripherally)
UMN lesion spares the upper face
Bell’s palsy - when to refer urgently to ENT if no improvement after what timeframe
If no improvement in paralysis AFTER 3 WEEKS
(plastic surgery referral after a 6-9 months)
Migraine and hormone replacement therapy (HRT) - what is recommendations
safe to prescribe HRT for patients with a history of migraine but it may make migraines worse
A 72-year-old man develops visual problems. He is noted to have a left homonymous hemianopia with some macula sparing.
Where is the lesion
Occipital cortex
Macula sparing lesions are in the occipital cortex!