Neurology Flashcards
stroke definition
rapid onset neuro deficit of vascular origin
Glabellar tap
confirmatory test of Parkinson’s
if tap patients forehead, eyes blink
MSA symptoms
autonomic dysfunction
cerebellar dysfunction
rigidity > tremor
PSP symptoms
vertical gaze palsy
postural instability
speech disturbance
corticobasilar degeneration
unilateral parkinsonism
aphasia
alien limb phenomenon
Parkinsonism Vs Parkinson’s
Parkinsonism: symmetrical, rapid progression, poor response to levodopa
Parkinson’s: asymmetrical, progressive nature, good response to Levodopa
Parkinsonism symptoms
vascular (strokes)
idiopathic
AI encephalitis
Infective (Syphollis, HIV, CJD)
Congential e.g. Wilson’s
Drugs (antipsychotics)
MS definition
AI demyelinating disorder of CNS, multiple plaques in separate time and space
MG management
- long acting ACh-esterase inhibitors e.g. neostogmine
- immunosuppression: azothioprine
ALS
mixed UMN/LMN
PLS
UMN
PMA
LMN
PBP
bulbar
investigations in MND
MRI brain +/- spinal cord
EMG
LP
unilateral vs bilateral UMN lesion gait
UL = circumducting gait
BL = scissoring gait
spasticity vs rigidity
spasticity = pyramidal
rigidity = extra-pyramidal
pyramidal tracts
corticospinal tracts
corticobulbar tracts
causes of cerebellar syndrome
- vascular: vertebrobasiliar stroke
- infection: encephalitis/abscess
- trauma: raised ICP
- AI: MS/ paraneoplastic
- Metabolic: ethanol/poisons
- Neoplastic: posterior fossa tumour
- congenital: spinocerebellar ataxia
fast phase nystagmus
cerebellar = towards lesion
vestibular = away from lesion
nystagmus maximal looking
cerebellar = towards lesion
vestibular = away from lesion
zones of cerebellum and function
- spinocerebellum: movement and posture
- neocerebellum: motor planning
- vestibulocerebellum: balance and vision
spinocerebellum problem presentation
truncal ataxia
neocerebellum problem presentation
dysmetria
intention tremor
vestibulocerebellum problem presentation
diplopia
nystagmus
Wallenberg’s syndrome symptoms (My PANDAS)
Miosis (Horner’s)
nYstagmus
Ptosis (Horner’s)
Anhidrosis (Horner’s)
Nystagmus
Dysphagia (ipsliateral)
Ataxia
Sensory loss of limb (contralateral)
3 causes of Marcus Gunn pupil
MS
Glaucoma
Retinal disease
Weber’s syndrome
midbrain strokes
ipsilateral 3rd nerve palsy
contralateral hemiplegia
autonomic dysreflexia
usually spinal injuries above T6
lack if splanchnic outflow from T6-T12
causes of syringomyelia
affects spinothalamic tracts
- Chiari malformations
- Trauma
- Tumours
- Idiopathic
symptoms of syringomyelia
loss of sensation to pain and temp, especially in hands
progressive limb weakness and stiffness
management of synringomyelia
shunting
pre-ganlionic Horner’s sx
anhidrosis of face
central Horner’s sx
anhidrosis of face and trunk
post-ganglionic Horner’s sx
no anhidrosis
central causes of Horner’s
stroke
syringomyelia
sclerosis (multiple)
wallenburg’s lateral meduallary syndrome
Pre-ganglionic causes of Horner’s
Tumour (pancoast)
Thyroidectomy
Cervical Rubs
Post-ganglionic causes of Horner’s
carotid artery dissection
cavernous sinus thrombosis
cluster headache
symptoms of degenerative cervical myelopathy
- pain in neck and limbs
- loss of ANS function
- loss of digital dexterity
- loss of sensory function and numbness
testing cerebellar dysfunction in upper limbs
tone
pronator drift
rebound phenomenon
coordination
cause of painful 3rd nerve palsy
posterior communicating artery aneurysm
ptosis and large pupil
3rd nerve palsy
ptosis and normal pupil
MG
ptosis and small pupil
Horner’s
UMN motor pathway
motor cortex to anterior horn cell
LMN motor pathway
anterior horn cell to motor unit
if UMN signs, where could lesion be?
brain
brainstem (midbrain, pons, medulla)
spinal cord
if UMN/LMN signs, where could lesion be?
anterior horn cell
if sensory signs, where could lesion be?
DRG
if motor symptoms, where could lesion be?
NMG or muscle
what are the different sensory pathways?
proprioception
vibration sense
touch
pain and temp
posterior circulation stroke symptoms
diplopia
dysarthria
dizziness
dysphagia
lateral medullary syndrome symptoms
ipsilateral Horner’s
ipsilateral sensory alteration of pain and temp
ipsilateral cerebellar ataxia
contralateral alteration of pain and temp (spinothalamic tract)
important parts to remember about status epilepticus
check BM
if poor nutrition/alcohol abuse - give Pabrinex
absence seizure EEG
3Hz
atonic sx and EEG
Sx: loss of tone
EEG: spikes
myoclonic sx and EEG
sx: jerking
EEG: spikes
investigations in epilepsy
eye witness account
examination
bloods
ECG, EEG
MRI brain
important parts of epilepsy management
safety advice: showers rather than bath, stop driving, inform DVLA
start treatment after 2 clearly unprovoked seizures >24 hrs apart
ALS symptoms
wasting and fasciculations
brisk reflexes and upgoing plantars
dyarthria and dysphagia
Bulbar palsy symptoms
dysarthria and dysphagia
limb involvement later
progressive muscular atrophy
pure LMN
primary lateral sclerosis
pure UMN
mimics of MND
syringomyelia
benign fasciculation syndrome
multifocal motor neuropathy
management of GBS
admit, early stages are unpredictable
spirometry
cardiac monitor
DVT prophylaxis
IVIg/plasma exchange
causes of predominantly sensory neuropathy
diabetes
thiamine def
malignancy
leprosy
amyloid
uraemia
causes of predominantly motor neuropathy
GBS
porphyria
diptheria
botulism
lead
Parkinson’s disease features
gait
mask like face
bradykinesia
reduced arm swing
rigidity
asymmetric resting tremor
postural instability
tremor
autonomic dysfunction
MS differentials
neurosarcoidosis
neuromyelitis optica spectrum disorders
fundoscopy tips
- use R hand to examine R eye
- use L hand to examine L eye
MRC grading
0: no contraction
1: flicker or trace of contraction
2: active movement, with gravity eliminated
3: active movement against gravity
4: active movement against gravity and resistance
5: normal power
reflex nerve root
- biceps (C5, C6)
- supinator (C5, C6)
- triceps (C7)
- knee (L3-4)
- ankle (L5-S1)
dorsal columns function
fine touch
vibration
proprioception
lateral spinothalamic tract function
pain
temperature
lateral corticospinal tract function
motor
parietal lobe function
sensory cortex
body organisation
temporal lobe function
memory
patterns of motor deficits: corticol lesions
- hyperreflexia proximally in arm or leg
- unexpected patterns (e.g. all movements in hand/foot)
patterns of motor deficits: internal capsule/corticospinal lesions
- contralateral hemiparesis
patterns of motor deficits: lesion with decrease cognition/homonyous hemianopia
cerebral hemisphere
patterns of motor deficits: cord lesions
- quadriparesis/paraparesis
- motor and reflex level = LMN signs at level, UMN signs below
patterns of motor deficits: peripheral neuropathies
distal weakness
peripheral neuropathy with one nerve involved and causes
mononeuropathy
(trauma/entrapment)
peripheral neuropathy with several nerves involved and causes
mononeuritis multiplex
(vasculitis/DM)
UMN lesions affect what cells
motor cells in pre-central gyrus to anterior horn cells
UMN lesion signs
pyramidal weakness
no wasting
spasticity (inc tone +/- clonus)
hyperreflexia
upgoing plantar
LMN lesions affect what cells
anterior horn cells to peripheral nerves
LMN lesion signs
wasting
fasciculation
flaccid/ dec tone
hyporeflexia
down going plantars
primary muscle lesions signs
symmetrical loss
reflexes lost later
no sensory loss
fatiguability in MG
sensory deficits pattern: distal sensory loss cause
neuropathy
sensory deficits pattern: sensory level cause
cord lesion
hemi-cord lesion = Brown-Sequard
sensory deficits pattern: dissociated sensory loss and cause
e.g. cervical cord lesion (Syringomyelia)
selective loss of pain and temp
(conservation of proprioception and vibration)
muscle weakness differentials if caused by problem with cerebrum/ brainstem
- vascular (infarct/haemorrhage)
- inflammation (MS)
- SOL
- infection (enceph, abscess)
muscle weakness differentials if caused by problem with cord
- vasc (ant spinal artery infarction)
- inflammation (MS)
- injury
muscle weakness differentials if caused by problem with anterior horn
MND
Polio
muscle weakness differentials if caused by problem with roots/plexus
- spondylosis
- CES
muscle weakness differentials if caused by problem with motor nerves
- mononeuropathy e.g. compression
- polyneuropathy e.g. GBC
muscle weakness differentials if caused by problem with NMJ
GB
LEMS
Botulism
muscle weakness differentials if caused by problem with muscle
toxins = steroids
myositis
inherited (DMD)
hand wasting differentials if caused by problem with cord
MND
Polio
Syringomyelia
hand wasting differentials if caused by problem with Roots
(C8,T1)
compression e.g. spondylosis
hand wasting differentials if caused by problem with brachial plexus
compression (cervical ribs, Pancoast)
Klumpke’s
hand wasting differentials if caused by problem with Neuropathy
mononeuritis = DM
compressive mononeuropathy = median/ulnar
hand wasting differentials if caused by problem with muscle
- disuse (RA)
- compartment syndrome
- distal myopathy
- cachexia
gait disturbance with basal ganglia problem and causes
festinating/shuffling
- PD
- Parkinsonism (MSA, PSP, Lewy body dementia)
gait disturbances with UMN bilateral lesion and cause
spastic, scissoring
- cord (compression, trauma, syringomyelia)
- bihemispheric (CP, MS)
gait disturbances with UMN unilateral lesion and cauuse
spastic circumducting
- hemisphere lesion: CVS, MS, SOL
- hemicord: MS, tumour
gait disturbances with LMN bilateral lesion and cause
bilateral foot drop
- polyneuropathy: CMT, GBS
- cauda equina
gait disturbances with LMN unilateral lesion and cause
foot drop - high stepping gait
- anterior horn: polio
- radicular: L5 root lesion
- sciatic/common peroneal nerve: trauma, DM
TACS diagnostic requirements
all 3 of:
1. Hemiparesis (contralateral)
2. Homonymous hemaniopia (contralateral)
3. Higher corticol dysfunction (dysphagia, neglect)
PACS vs TACS
PACS only needs 2/3
cause of lacunar stroke
small infarcts around basal ganglia, internal capsule, thalamus, pons
symptoms of lacunar stroke
absence of:
higher corticol dysfunction
homonymous hemianopia
brainstem signs
stroke secondary prevention
clop 75mg started after 2 weeks
(initially 300mg aspirin)
stroke extra management points
MDT
safe eating
neuro rehab
DVT prophylaxis
sores
subdural appearance on CT head
crescentic haematoma over one hemisphere
extradural appearance on CT head
lens shaped haematoma
Kernig’s sign
straightening leg with hip at 90 degrees = pain
Brudzinki’s sign
lifting head = lifting of legs
when to give dexamethasone in meningitis?
bacterial
definition of epilepsy
recurrent tendency to spontaneous, intermittent abnormal electrical activity in brain
causes of epilepsy
idiopathic
acquired:
- vascular (CVA, SOL)
- corticol scarring (trauma, infection)
neuro obs
GCS
pupils
HR
BP
RR
SpO2
Temp
important to remember with CN6 palsy
false localising sign
what is neuroprotective ventilation?
hyperventilate
what worsens the Parkinson’s tremor?
worsened by distraction
what are the features of Parkinsons?
- tremor (worse at rest)
- rigidity (inc tone = lead pipe, rigidity + tremor = cog wheeling)
- bradykinesia (slow initiation of movement, hypomemetic face)
- reduced arm swing
what Parkinson’s meds to start if young and fit?
start with Da agonists, MOA-B inhibitors, L-DOPA
What Parkinson’s meds to start if biologically frail +/- co-morbidities?
L-DOPA, MOA-B inhibitors
benefit of COMT inhibitors
lessen end of dose effect
Lhermitte’s sign
neck flexion = electric shock in trunk/limbs
treatment of MS
IFN-beta
Natalizuman
cord compression signs
LMN signs at level
UMN signs below level
acute: tone and reflexes reduced
what is spondylosis?
degeneration due to trauma or ageing
symptoms of cervical spondylosis
neck stiffness
arm pain
motor/sensory upper limb disturbances according to compression level
symptoms of lumbar spondylosis
low back pain
sciatica
what are the most commonly compressed nerve roots
L5/S1
L5 root compression symptoms
weak toe extension
foot drop
weak inversion
decreased sensation on inner dorsum
S1 root compression symptoms
weak plantar flexion and eversion
loss of ankle jerk
calf pain
systemic causes of facial nerve palsy
GBS
sarcoid
DM
definition of mononeuritis multiplex
2+ peripheral nerves affected
median nerve (C6-T1)
- location
- motor function
- sensory loss
- wrist: carpal tunnel/trauma
- motor function: LLOAF muscles, thenar wasting
- sensory loss: radial 3.5 fingers
ulnar nerve (C7-T1)
- location
- motor function
- sensory loss
- elbow trauma (e.g. supracondylar fracture)
- motor: claw hand, hypothenar wasting
- sensory: ulnar 1.5 fingers
radial nerve (C5-T1)
- location
- motor function
- sensory loss
- damaged at wrist (low), humerus (high) and axilla (very high)
Motor: - low = finger drop
- high = wrist drop
- v high = triceps paralysis, wrist drop
sensory: snuff box
phrenic nerve (C3-C5)
- location
- motor function
- neoplastic (lung Ca, myeloma), mechanical (cervical spondylosis), infective (HIV, TB)
- motor: orthopnoea and raised hemidiaphragm
Lateral cutaneous nerve of thigh (L2-3)
- location
- sensory loss
- entrapment under inguinal ligament
- sensory: meralgia paraesthetica (anterolateral burning thigh pain)
sciatic nerve (L4-S3)
- pelvic tumours, pelvic fractures
- motor: hamstrings, all muscles below knee
- sensory: below knee laterally and foot
common peroneal nerve (L4-S1)
- location
- motor function
- sensory loss
- fibular head trauma/sitting cross legged
- motor: foot drop, weak ankle dorsiflexion and eversion
- sensory: below knee laterally
Tibial nerve (L4-S3)
- motor function
- sensory loss
- motor: can’t plantar flex, poor toe flexion
- sensory: sole of foot
GBS management
Airwary
Analgesia
Autonomic (may need catheter)
Antithrombotic (TEDS, LMWH)
Charcot-Marie-Tooth symptoms
peroneal muscular atrophy
Hereditary motor and sensory neuropathy
MND diagnostic criteria
El Escorial
where is lesion in ALS
loss of motor neurones in cortex and anterior horn
symptoms of myopathy
- gradual onset
- symmetrical proximal weakness
- preserved tendon reflexes
NF1 symptoms
CAFE NOIR
Cafe au lait spots
Axillary freckling
Fibromas (Neuro)
Eye (Lisch nodules)
Neoplasia (CNS, phaeo)
Orthopaedic (Kyphoscolisosi)
dec IQ and epilepsy
Renal (inc BP)
causes of peripheral neuropathy
ABCDE
Alcohol
B12 deficiency
Cancer and Chronic Kidney Disease
Diabetes and Drugs (e.g. isoniazid, amiodarone)
Every vasculitis