neurology Flashcards
mx of tension-type headache?
acute- aspirin, paracetamol, NSAID
prophylaxis- acupuncture
amitriptyline
features of migraine?
severe, unilateral throbbing headache
associated with nausea, photophobia, phonophobia
diagnostic criteria for migraine? ABCDE
At least 5 attacks fulfilling criteria B-D:
B- attacks lasting 4-72 hours
C- 2 of the following characteristics:
- unilateral location
-pulsating quality
- moderate or severe pain headache
- aggravation by or causing avoidance of routine physical activity
D- during headache at least one of the following:
1. Nausea and/or vomiting
2. Photophobia and phonophobia
E- not attributed to any other disorder
triggers for migraine
Chocolate Hangovers Orgasms Cheese Oral contraceptives- CI'd if aura Lie-ins Alcohol Tumult Exercise
mx of acute migraine?
1st line- oral triptan and NSAID or paracetamol
metoclopramide or prochlorperazine
prophylaxis of acute migraine?
if 2+ attacks a month
Topiramate or propranolol
acupuncture
riboflavin
what is wrong with topiramate?
cleft palate and reduces effectiveness
RFs for cluster headache?
male, smokers
features of cluster headaches?
Unilateral pain around one eye- episodes last 15 minutes-2 hours
Restless and agitation
Eye- redness, lacrimation, lid swelling, miosis, ptosis
Rhinorrhoea
mx of cluster headaches?
100% O2
sub cut triptan (sumatriptan)
prophylaxis- verapamil, short course prednisolone may help
what is trigeminal neuralgia?
a pain syndrome characterised by severe unilateral pain
majority are idiopathic but could have serious underlying cause such as tumour
features of trigeminal neuralgia?
a unilateral disorder of brief electric-shock like pains, abrupt in onset and termination, limited to one or more divisions of the trigeminal nerve
triggers= washing, shaving, brushing teeth
RFs for trigeminal neuralgia?
hypertension, >50
Ix of trigeminal neuralgia?
MRI
mx of trigeminal neuralgia?
1st line= carbamazepine
failure to respond needs prompt referral to neurology
RFs of GCA?
over 50s, associated with polymyalgia rheumatica
features of GCA?
scalp tenderness jaw claudication pulseless temporal arteries temporal pulsating headache amaurosis fugax
ix of GCA?
ESR
raised CRP, platelets, alk phos, reduced Hb
temporal artery biopsy
mx of GCA?
Steroids- prednisolone 60mg
PPI and bisphosphonates
complications of GCA?
Visual loss
signs of raised ICP?
Worse walking, bending forwards, lying down, coughing associated with vomiting papilloedema focal signs seizures
layers of meninges of the brain
Dura mater
Arachnoid mater
Subarachnoid space
Pia mater
causes of SAH?
Berry aneurysm- associated with adult PKD, Ehlers Danlos syndrome, coarctation of the aorta AV malformation Pituitary apoplexy Arterial dissection Mycotic aneurysms
features of SAH?
Thunderclap headache N&V Meningism: photophobia, neck stiffness Coma seizures
Ix of SAH?
CT head
LP- done if CT is negative, perform 12 hours after symptom onset to allow development of xanthochromia (RBC breakdown)
refer to neurosurgery as soon as SAH confirmed
Tx of SAH?
CT intracranial angiogram
clipping of aneurysm
vasospasm is prevented with nimodipine
external ventricular drain for hydrocephalus
maintain cerebral perfusion with dexamethasone to decrease cerebral oedema
causes of subdural haemorrhage?
tearing of bridging veins between the venous sinuses and the cortex
causes increased ICP
RF for subdural haemorrhage?
traumatic head injury
cerebral atrophy/increasing age
alcoholism
anticoagulation meds
Signs and symptoms of subdural haemorrhage?
acute- raised ICP, confusion, seizure
chronic- cognitive decline, personality change, headache
Ix of subdural haemorrhage?
CT- gold standard
diffusely spreading crescent shaped mass
mx of subdural haemorrhage?
neurosurgery- monitor ICP and decompressive craniotomy
if chronic and no neuro deficit- can be managed conservatively
what is an extra dural haemorrhage?
collection of blood between the dura mater and bone
symptoms of extra dural haemorrhage?
briefly consciousness after a low impact injury then lucid interval:
then altered consciousness, severe headache, N&V, confusion, seizures
may lead to rapid increase in intra-cranial pressure- ipsilateral pupil dilatation, signs of brainstem injury/ compression
Ix of extradural haemorrhage?
CT- hyperdense biconvex (lemon shape) adjacent to skull
mx of extradural haemorrhage?
craniotomy and clot evacuation
give mannitol if raised ICP
causes of encephalitis?
viral infection- HSV 1&2, VZV, EBV, CMV, HIV, measles and mumps
Secondary to bacterial meningitis, TB, malaria, listeria etc
symptoms of encephalitis?
features of a viral infection
LOC
behavioural change
focal neurological deficit
Ix of encephalitis?
LP and CSF studies (PCR)- moderate increase in protein level. lymphocytes and decreased glucose
bloods and cultures
mx of encephalitis?
if viral- aliclovir IV high dose for 14 days
IM benpen in meningitis
anti-seizure meds
what is guillain barre syndrome?
an immune mediated demyelination of the peripheral nervous system often triggered by an infection (classically campylobacter jejuni)
features of GBS?
Progressive weakness in all 4 limbs some sensory signs history of gastroenteritis areflexia CN involvement e.g. diplopia autonomic involvement e.g. urinary retention, diarrhoea
Ix of GBS?
LP- rise in protein found with a normal WCC
nerve conduction studies
if resp muscle involvement -> ITU admission
mx of GBS?
IVIG for 5 days
causes of epilepsy?
idiopathic CP tuberous sclerosis mitochondrial diseases head injury
types of epilepsy?
primary generalised- LOC, bilateral discharges, no ofcal brain abnormality
partial/focal- one hemisphere involved.
partial seizure is focal structural abnormality until proven otherwise
types of primary generalised epilepsy?
-tonic-clonic- stiffness and rigidity followed by rhythmic jerking. can have tongue biting and incontinence. post-ictal confusion and todd’s paralysis
- tonic
- clonic
- absence
- myoclonic
- atonic
name some non-epileptic causes of seizures?
febrile convulsions
Alcohol withdrawal seizures
Psychogenic non-epileptic seizures
types of focal seizures?
focal aware
focal impaired awareness
awareness unknown
focal to bilateral seizure (secondary generalised)
features of temporal lobe seizure?
HEAD Hallucinations (auditory, olfactory, gustatory) Epigastric rising/emotion Automatisms (lip smacking) Deja vu/ dysphasia (Wernicke's area)
features of frontal lobe seizure? (motor)
head/leg movements
posturing
post-ictal weakness
Jacksonian march (up and down motor homunculus)
features of parietal lobe seizures? (sensory)
paraesthesia
features of occipital lobe seizures? (visual)
floaters/flashes
Ix of epilepsy?
EEG and MRI
mx of epilepsy?
1st line for generalised seizures- sodium valproate 2nd line lamotrigine
1st line for partial seizures- carbamazepine
driving and epilepsy?
cannot drive for 6 moths following a seizure, 12 months if established epilepsy
How can epilepsy meds contraindicate other meds e.g. warfarin?
they can induce/inhibit the P450 system affecting metabolism of other drugs
epilepsy and pregnancy?
sodium valproate is teratogenic
breastfeeding is generally considered safe
epilepsy and contraception?
they both reduce the effectiveness of eachother