Neurology Flashcards
Name 3 common sites for metastases to the brain
Lung
Breast
Prostate
Risk factors for brain tumours
Family syndromes
Ionising radiation
X - Ray exposure
MEN - 1
Signs of ICP
Headache
Nausea
vomitting
Papilloedema
Warning signs for a headache
worse on:
- waking
- bending over
- lying down
- coughing
Cerebllar signs
DANISH D - Dydiadochockinesis A - Ataxia N - Nystagmus I - Intention tremor S - Slurred speech H - hypotonia
Clinical presentation of brain tumour
Paresis of limbs Speech disorder Dysphasia Seizures Personality changes Coma
Brain tumour investigations
- MRI with gadolinium contrast
- Biopsy + Histology
Causes of Cauda equina syndrome
Lumbar disc herniation
- L4/5
- L5/S1
Spinal verterbral fractures
Malignancy
Spinal infection
Spinal stenosis
- AS
CES red flags
- Reduced anal tone
- Bilateral sciatica
- Saddle anaesthesia
- Bowel dysfunction
- Bladder dysfunction
Urinary retention - Sexual dysfunction
Causes of cranial nerve lesions
Trauma Tumour SLE Herpes zoster Palsy
CN3 palsy presentation
- Eye down and out
- Ptosis
- Mydriasis
CN4 palsy presentation
- Eye down and In
- Diplopia when looking down
- Head tilt
CN7 palsy - UMN presentation
- Contralateral paralysis of facial muscles
- Forhead sparing
- Lip drooping
CN7 Palsy - LMN presentation
- Ipsialteral paralysis of facial muscles
- NO forhead sparing
- Loss of anterior 2/3 of taste
- Dry eyes
- Hyperacusis
- Lip droop
Causes of CN7 palsy
Inflammation of parotid
Middle ear infections
CN9 palsy presentation
Uvular deviation
decreased gag reflex
Risk factors for dementia
Age > 65 Family Hx Downs syndrome Smoking DM Head trauma
Genetic RF for dementia
Apolipoprotein E-E4
Deterministic gene - APP
Alzehimers
- Onset
- Sx and signs
- pathology/imaging
- gradual
- sx Aphasia Agnosia Apraxia Loss of STM + LTM Cognitive impairement Disorientated
Vascular
- Onset
- Sx and signs
- pathology/imaging
- Abrupt / gradual
- Sx
Stepwise deterioration
periods of stability - Areas of ischaemia present on imaging from previous CVA
Lewy body
- Onset
- Sx and signs
- pathology/imaging
- Insidious
- Sx Hallucinations Parkinsoism - Tremor - SLowing - Rigidity
- Deposition of abnormal proteins
Charecterisitc features of Alzehimers
- Neurofibrillary tangles
- Beta amyloid plaques
Alzehimers mangement
Cholinesterase inhibitors - Donepezil - Rivastigime - Galantamine Improves memeory and cognitive function
NDMA receptor antagonist
- Memantine
Viral causes of encephilitis
- Herpes simplex
- Varicella zoster
- CMV
- EBV
- MMR
Encephilits presentation
Fever Headache Odd behaviour Seizure Focal neurological deficits - Hemiparesis - Dysphasia
Encephalitis Investigations
1st - LP
2nd - MRI
3rd - swabs
What is recommended in all encephalitis patients
HIV testing
Ecepahlitis management
- Aciclovir
Metabolic causes of seizures
hypoglycaemia
hyponatraemia
hypoxia
What is the prodrome
not part of the seizure
- changes in mood and behaviour
- lasts hours to days
what is aura
part of a seizure
- patient is aware
- strange gut feeling
- De-javu
- strange smells
Where is a seizure with aura typically located
temporal lobe
What are localising features to a temporal lobe seizure
- automatisms
- dysphasia
- dejavu
- emotional disturbance
- hallucination of smell/taste
What are localising features to a frontal lobe seizure
- posturing
- pedalling leg movements
- jacksonian march
- motor arrest
- todds palsy
What are localising features to a parietal lobe seizure
- tingling
- numbess
- motor sx
Charecterisitc of a generalsied seizure
- LOC
- bilateral symmetrical motor movements
Features of tonic clonic seizure
- LOC
- limbs stiffen then jerk
- eyes open
- tongue bitten
- incontinence
- post ictal confusion
Features of myoclonic seizure
Sudden jerk of limb/trunk/face
Causes of status epilepticus
- abruptly stopping anti-epileptic medication
- alcohol use
- poor compliance to therapy
Status epilepticus tx
1st - Lorazepam
2nd - Phenytoin
3rd - Phenobarbital
Focal seizures tx
1st - Carbamazepine / Lamotrigrine
2nd - Sodium valporate
Adverse effects of Sodium valporate
Teratogenic
drug induced liver injury
pancreatitis
Adverse effects of carbamezapine
Teratogenic
Agranulocytosis
SIADH
Hyponatraemia
Adverse effects of lamotrigrine
severe skin reactions
Adverse effects of phenytoin
cardiac arrhythmias
What is GCA astrongly linked to
Polymyalgia rheumatica
GCA presentation
Unilateral headache scalp tenderness jaw claudication blurred vision fever vision loss - painless peripheral oedema
GCA investigations
Clinical presentation
bloods
- LFTs - Raised ALP
- FBC - Anaemia
Duplex US of temporal.A
Temporal.A biopsy
Findings from temporal artery biopsy in GCA
Multinucleated giant cells
GCA management
Prednisolone - 60mg
Asprin - 75mg
Omeprazole
What can occur if patients with GCA stop taking theor steroids
Adrenal crisis
What is Guillian barre syndrome
Progressive weakness of proximal muscles due to Ab against myselin sheath
GBS aetiology
Infection
- Campylobacter jejuni
- CMV
- EBV
GBS presentation
- Symmetrical ascending muscle weakness
- Pain in back
- Areflexia
- Parasthesia
- Flaccid paralysis
Criteria for diagnosing GBS
Brighton
GBS investigations
LP
- Raised protein but normal WCC
Nerve conduction studies
GBS differentials
Other causes of acute paralyis
- Stroke
- Encephalitis
- S.C compression
GBS managment
- IV immunoglobulins
- Plasma exchange
- Enoxaparin
What should you do prior to GBS tx
Screen for IgA deficiency
Causes of SAH
Aneurysmal
- ADPKD
- Atherosclerosis
- HTN
- Ruptured berry aneurysm
Non aneurysmal
- Trauma
- AV malformations
- Coagulopathies
SAH presntation - sx
thunderclap headache - occipital nausea vomitting collpase reduced consciousness seizure
SAH signs
Mengism
- photophobia
- stiff neck
- pain on neck flexion
+VE kernigs sign
What is kernigs sign
inability to straighten the leg when the hip is flexed to 90 degrees.
SAH investigations
- Non contrast CT
- LP
negative CT but hx is suggestive
SAH findings and timings for LP
- 12hrs post sx
CSF analysis
- elevated red cell count
- Xanthochromia
SAH management
- ABCDE
- Fluids
- Analgesia
- Anti emetics
What should patients with SAH started on
Nimodipine
- reduces vasospasm
SAH complications
hydrocephalus
vasospasm - cerebral infarction
hyponatraemia
rebleeding
Subdural haemorrhage pathophsiology
Tearing of bridging veins
- deceleration injury
- blood accumulates
- raised ICP
- brain herniation
SDH risk factors
alcohol excess epileptics old age trauma clotting disorders
EDH clinical presentation
Initial LOC Lucid period headache nausea vomitting drowsiness
EDH presentation - signs
- drop in GCS
- Positive babinski sign
- Hypereflexia
- Blown pupil - ipsilateral
Causes of tension headache
MC SCOLD M- missed meals C - Conflict S - stress C - clenched jaw O - Over exertion L - Lack of sleep D - Depression
Causes of migraine
CHOCOLATE C - chcoclate H - hangovers O - Orgasma C - Cheese O - Oral pill L - Lie ins A - Alcohol T E - excercise
Migraines presentation
Aura - cravings / mood changes
Unilateral - pulsating
Worse on movement
With one of the following
Photophobia/ phonophobia
Nausea / vomiting
Migranes tx
Mild
- NSAIDs
- Anti emetics
Severe
- Sumitriptan
Migraine prophlaxis
1st - Propranolol / Topirmate
2nd - Acupuncture
3rd - Amitriptyline
Cluster headache presnetation
Rapid onset excrutitating pain (15-180mins) Lacriamtion bloodshot eye rhinorrhea Miosis Ptosis lid swelling nocturnal pain vomitting
Cluster headache acute tx
- 100% O2
- Sumitriptan
Cluster headache prophylaxis
Avoid triggers - alcohol
1st - CCB
Trigeminal neuralgia presentation
unilateral pain
- electryfying/burning/lighting
Trigeminal neurlagia causes
CN 5 compression
- cyst
- tumour
- MS
Trigeminal neuralgia Tx
Avoid triggers
Meds
1st - Carbamezapine
2nd - Pheytoin/gabapentin
surgical
- Microvascualr decompression
Shingles presentation
Pain + tingling - dermatome malaise myalgia fever headache rash - papules + vesicles pruritus
Shingles investigations
- Clincal dx
- confirmes with PCR testing
Shingles differential dx
atopic eczema
impetigo
contact dermatitis
migraine
shingles risk for reactivation
old age immunocompromised HIV Hodgkins BM transplant
Shingles tx
IV aciclovir
Shingles complications
Post herpetic neuralgia
- burning intracable pain
- poor response to analgesics
tx:
- Amitryptyline
What is Huntingtons disease
AD condition charecterised by progressive neurodegeneration
Huntingtons disease risk factors
Family Hx
Longer CAG repeat
Huntingtons disease pathophysiology
30-40 year olds
Triple CAG disorder - > 36 Anticipation Mutation on chromosome 4 Polyglutamine disorder Glutamine accumulates in striatum causing cell death Chorea
What forms the striatum
caudate
putamen
HD net effect
Decreased - GABA
Decreased - Ach
Increased - dopamine
HD clincial presentation
behavioural changes personality chnages chorea poor cordiantion 'dysarthria dysphagia jerky eye movements aggression
HD investigations
genetic testing
CT / MRI
- Atrophy of caudate nucleus
HD differential dx
other causes of chorea
- stroke of basal ganglia
HD - chorea tx
Tetrabenazine - dopamine depeting agent
Sulpride - Dopamine receptor antagonist
HD - depression tx
Sertraline
HD - aggression tx
Risperidone
- Anti psychotic
What is mengingitis
Inflammation of meningies - Arachnoid + Pia
Notifiable disease
Common organsims causing menigitis in children
Neisseris meningitides -
Gram -ve Diplococci
Strep peneumonia
Haemophilius influnzae
Common organsims causing menigitis in neonates
E.Coli
Strep. Agalactiae - Group B haemolytic strep
Common organsims causing menigitis in pregnancy
Listeria monocytogenes
Meningitis presentation
Heacdache neck stiffness Fever Photophobia Kernigs sign Petechial rash vomitting
What is Brudzinski’s sign and when is it present
Hip and knees flex when the neck is flexed
- Meningitis
Meingitis investigations
Bloods
- FBC/U+E/Glucose/Coag screen
- Blood cultures
Imaging
- CXR
- CT
LP
- Protein
- glucose
- M&S
- Cell count
Meningococcal septicaemia tx
- community
- hospital
- IM Benzylpenicillin
- Cefotaxime
Bacterial meningitis tx
< 55 y/o
- IV Cefotaxime
> 55y/o or pregnant
- IV Cefotaxime + Amoxicillin
Bacterial meningitis prophylaxis
Oral ciprofloxacin
Viral menignitis tx
Aciclovir - herpes simplex
What is MND
Degeneration of Upper and lower motor neurone disease
signs of LMN disease
muscle wasting
fascicualtions
reduced tone
reduced reflexes
Signs of UMN disease
Increased tone
Spactisity
Upgoing plantar reflexes
ALS presentation
Upper and lower motor neurone signs
- focal wasting
- fasciculations
- spascticity
- brisk reflexes
- wrist and foot drop
Progressive bulbar palsy
Dysarthria
Dysphagia
Choking
Tongue fascicualtions
MND management
Riluzole - Slows disease progression and extend survival time
UMN Lesions presentation
Hypertonia spasticity clasp knife reflex brisk reflexes Positive babinski sign clonus Upper limb - extensors weaker Lower limb - flexors weaker
LMN lesions presentation
Hypotonia Flaccid paralysis absent reflexes fasciculations muscle atophy
What si multiple sclerosis
Chronic inflammatory Auto-immune mediated demylenation of CNS - Oligodendrocytes
Multiple sclerosis classification
- RRMS
- Primary progressive
- Secondary progressive
- Progressive relapsing
describe Relapsing remitting MS
Sx occur in attacks
- relpases and remission
common sites for demyelination in multiple sclerosis
optic nerve spinal cord brianstem cerebellum corpus collosum
Multiple sclerosis eye presentation
Optic neuritis double vision pain Intranuclear opthalmoplegia conjungate lateral gaze disorder
Multiple scerosis presenation
parasthesia pain UMN signs - Spasticity - reduced power - hyper reflexia sexual dysfunction bladder and bowel dysfunction Cerebellar - ataxia
What is Lhermitte’s sign
Elerctic shock down spine when neck is flexed
What is Uhthoff’s phenomenon
Pre existing sx worsen with increased temp
Multiple sclerosis presentation mneumonic
DEMYELINATION
D - Diplopia E - eye movements painful optic neuritis M - Motor weakness nY - Nystagmus L - Lhermitte's E - Intention tremor N - Neuropathic pain A - Ataxia T - Talking slurred I - Impotence O - Overactive bladder N - Numbness
Multiple sclerosis investigations + diagnostic criteria
MRI - demyelination plaques
LP + CSF electrophoresis
McDonald criteria
Multiple sclerosis differential dx
SLE
Sarcoidosis
Multiple sclerosis accute attack management
Methylprednisolone
Multiple sclerosis - bladder dysfunction tx
Anticholinergics
- Oxybutynin
- detrusor overactivity
Parkinsons disease - mneumonic
TRAPS T - Tremor R - cogwheel rigidity A - Akinesia P - Postural instbaility S - Shuffling gait
Parkinsons disease presentation
Resting tremor cogwheel rigidity Bradykinesia - micrographia - speech slow - difficulty initiating movements Stooped posture Shuffling gait reduced arm swing Depression
Parkinsons disease management
Levodopa
- Imoroves tremor + bradykinesia
What are dopamine agonists
used to delay starting L-DOPA
- Ropinirole
What are MOA-B inhibitors
Monoamine oxidase B inhibitors
Inhibit MOA-B which braks down dopamine
Selegline
Rasagiline
What are COMT inhibitors
Inhibit Catecho-o-methyl transferase inhibitors
- Entacapone
Causes of peripheral neuropathy
DAVID D - DM A - Alcohol V - Vit B12 def I - Ineffective (GB) D - Drugs (Isoniazid)
what is spinal cord compression
medical emergency
spinal cord compression leading to UMN signs + specific sx
Spinal cord compression causes
spine trauma vertebral tumour disc herniation disc prolapse spinal cord neoplasms
Spinal cord compression presentation
Spasticity Hyperreflexia Hesitancy increased frequency sensory loss at level below lesion
What leads to paraplegia
spinal cord lesion
What leads to hemiplegia
brain lesion
Function of corticospinal tracts
Motor
decussation - medulla
Function of DCML
Sensory -
fine touch
propioception
vibration
Decussation - medulla
Function of spinothalamic
Sensory -
Temperature
Pain
Crude touch
Lateral - pain and temp
Medial - crude touch
What is spondylolisthesis
Spillage of vertebrae over the one below
What is spondylosis
Degenerative disc disease
What is myelopathy
Spinal cord compression - UMN signs
What is radiculopathy
Spinal root compression
- LMN signs
- Pain in dermatome supplied by nerve root
- meakness in myotome supplies by nerve root
Causes of Ischameic stroke
Thrombosis - Athermomatous plaque
Embolic
Thromboembloism - Carotid A
Cardioembolic - AF
Cardiac mural thrombi - MI/IE
RF for ischaemic stroke
Older age Hypertension Smoking Family hx DM AF Combined pill
Causes of haemorrhagic stroke
Ruptured cerebral artery
Trauma
AV malformation
Repurfusion injury - ischaemic stroke
RF for haemorrhagic stroke
Haemophillia Hypertension Ant-coagulation Vasculitits Older age Malignancy
Presentation of an ACA stroke
- Contralateral limb weakness
- Contralateral sunsory disturbance
- Incontinence
- Apraxia
- Drowsiness
- Dysarthria
Presentation of a MCA stroke
- Contralateral limb and sensory loss
- Contralateral homonymous hemianopia (No sparing)
- Aphasia
- Dysphasia
- Facial droop
Presentation of PCA stroke
- Contralateral homonymous hemianopia (Macular sparing)
- Contralateral sensory loss
- Memory defecits
- Vertigo
- Prospopagnosia
- Blindness
Presentation of stroke in posterior circulation
Motor defecits
- Hemiparesis
- Facial paralysis
Paraesthesia Ipsilateral cranial nerve defecits Vertigo Nausea Vomitting
Stroke investigations
DW MRI / CT ECG Bloods - Glucose - hypoglycaemia - FBC - polycythaemia - ESR - Vasculitis
Stroke - Ischameic management
Presents <4.5hrs after sx
Thrombolysis
- IV ALTEPLASE
- clopidogrel after 24hrs
If thrombolysis not appropriate
- 300mg Asprin (2 weeks)
- 75mg Clopidogrel
Haemorrhagic stroke management
Anti-hypertensives
- Beta blockers
- CCB
Nimodipine
- prevents vasospasm
Reverse anti-coag
Anticonvulsant
Secondary prevention for stroke
Clopidogrel - 75mg Atrorvastatin - 80mg Modifiable RF - HTN - DM - Smoking cessation - Alcohol
Clinical presentation of TIA
- unilateral weakness or paralysis
- dysphasia
- ataxia
- vertigo
- loss of balance
- Amaurosis fugax
Curtain effect
Clinical sign of ICA
stenosis
TIA investigations
Bloods
Carotid. A doppler US
- Stenosis / atheroma
MRI head with diffusion weighted imaging
- detect small infarct
GOLD STANDARD
ECG - Arrhythmias
What is the ABCD2 risk score used for
Risk of having a stroke following a TIA
Describe the ABCD2 risk score
A - Age > 65
B - BP > 140/90
C - Clincal features
Unilateral weakness = 2
Dysphasia w/ no weakness = 1
D - Duration
> 60 mins = 2
10-60 mins = 1
D - Diabetes
DM = 1
> 3 - refer to specialist (24hrs)
TIA management
300mg Asprin (2 weeks) 75mg Clopidogrel
Stroke secondary prevention
SSRIs MOA
Inhibit seretonin uptake increases availability in synapse
SSRIs examples
Citalopram
Sertraline
Fluxetetine
SSRIs S/E
GI upset
Hyponatraemia
Decrease appetite
Citalopram - Increase QT Interval
Anti emetics - recetor targets and exmples
D1 - Metclopraminde
H1 - Cyclizine
5-HT3 - Odansetron
Benzodiazepenes examples and indications
Lorazepam
Status epilepticus
Most common cause of a haemorrhagic stroke
HTN
Cluster headaches prophylaxis
Verapamil
Cluster headaches are more common in which group of people?
Smokers
Men
Common triggers for migranes
Tiredness/stress Alcohol combined pill mensruation bright lights
Migraines prophylaxis
Topirmate
Propanolol
Amitryptaline
Criteria required for Multiple sclerosis diagnosis
McDonald criteria
Red flag sx for raised ICP
Worse on coughing or straining
Postural - worse on stnading/lying/bending over
Vomitting
Trigeminal neuralgia
- Presentation
- 1st line
- Prophlaxis
Facial pain
Electric - shooting pain
Worsen overtime
Carbamazepine
CCB
Trigeminal neuralgia triggers
cold weather
spicy food
caffeine
citrous fruits