Medicine Flashcards
Focal seizure
Focal onset, behaviour
LOC + → FS with impaired awareness - automatisms, longer duration (>30s)
LOC - → FS with intact awarness
Lamotrigene - preferred
Leviteracetam - elderly
Absence seizure
LOC +, Tone ⓝ
EEG - spike and waves (domes)
DOC - Ethosuximide
JME
Juvenile
Family h/o
Many seizures
- (mc) myoclonus ↑ on awakening
- GTCS
- Absence seizure
DOC - valproate
Fertile female - Leviteracetam
GTCS
3 stages
Tonic - stiff - ictal cry +
Clonic - froathing
Post ictal - flaccid
DOC - Valproate
Temporal lobe epilepsy
Febrile seizure + Focal seizure+ LOC
Temporal lesion - Hippocampal sclerosis
TOC - Surgery
Status epilecticus
Seizure> 5mins
DOC Lorazepam
Late - refractory - Thiopentone
Carbamazepine not recommended
Seizure in pregnancy
Seizure frequency ↑30%
Already on AED, continue on lowest effective monotherapy dose
Movement disorders
Athetosis - crawling - globus pallidous
Chorea - dance - caudate nucleus
Ballismus - flinging - C/L Sub thalamic nucleus
Tremors
Intentional - cerebellar
Flapping - Encephalopathy
Fine - Thyrotoxicosis
Essential - AD - ↑ in anxiety - ↓ in drinking - DOC - propranolol
Rigidity
Cog wheel - Parkinsons
Lead pipe - Extra pyramidal
Clasp knife - Pyramidal
Parkinsonism
mc - Idiopathic - Parkinson’s disease
Mcc of 2° Iatrogenic
Inherited - AD - LRRK gene - chr 12
C/F
°Resting Tremors
°Cog wheel rigidity
°Bradykinesia
°Micrographia
°Monotonous speech
°Mask like face
°Non motor
-Anosmia (1st symptom)
-Depression++
-Dementia
T/t - DOC - Levodopa
<60 yrs - Dopamine agonist
Neuroprotective - Rasagiline
Rescue therapy - Apomorphine
Progressive supra nuclear palsy
Extended posture
Defective down gaze - surprised look - forehead wrinkles - early falls
Vertical square wave jerks in eyes
Dystonia
Dementia of lewy body
Parkinson
Early onset dementia
Visual hallucinations
ACA infarction
LL weakness + Urinary incontinence - Paracentral lobule
Primitive reflexes - supplementary motor area
Antisocial behaviour
Gait apraxia
Abulia - cingulate gyrus - loss of motivation
Left MCA infarction
Aphasia
- proximal M1 - Global
- superior division - Broca’s
- Inferior division - wernicke’s
Gerstman syndrome - Angular gyrus
- acalculia - impaired calculation
- finger agnosia
- left right disorientation
- agraphia - cannot write
Right hemiparesis and hemianesthesia
Right MCA syndrome
Right angular gyrus
Hemispatial neglect
Aphasia (-)
Left hemiparesis and hemianesthesia
PCA infarction
Cortical blindness with macular sparing
Amnesia
Alexia - cannot read
Dejerine Roussy Syndrome
Anesthesia
Paraesthesia - altered sensation
Lateral thalamus lesion
Antons syndrome
Partal blindness
Unaware
Palinopsia - moving objects as multiple images
Balint’s syndrome
Occulomotor apraxia
Optic ataxia
Simultagnosia
Visual spatial orientation
Hand eye coordination
Parietal lobe
Complete hemiparesis
Cortical lesion
MCA infarct
Weakness - ↑↑UL, ↑LL, (+)Face
Dense hemiparesis / pure motor hemiparesis
Internal capsule lesion
MCA infarct
Weakness UL = LL
Face - spared
Acute ischemic stroke treatment
rtpa - iv - 0.9 mg/kg - <4.5 hrs
Aspirin
Anticoagulants - AF, Prosthetic valves
Indications of thrombolysis
I/V < 4.5 hrs
Large vessel occlusion <6hrs
Large deficit after iv thrombolysis- intra arterial thrombectomy <24 hrs
C/I for thrombolysis
BP >185/110 mmhg
Bleeding diasthesis
Hemorrhagic cva
Major surgery <14 days
GI bleed <21 days
Intracerebral hemorrhage
Mc hypertension - mc putamen - C/L hemiparesis
Thalamus - hemianesthesia
Cerebellum - Ataxia, Vertigo
Pons - pinpoint pupil, quadriparesis, ↑HR, ↑RR, ↑thermia, ↑hidrosis, deep coma, B/L plantar extensor
Subarachnoid hemorrhage
Mcc - trauma
Mcc spontaneous - berry aneurysm - defect in tunica media
AVM
C/f
Thunderclap headache
Neck rigidity with ↓ flexion
LOC
Re rupture - mcc mortality
Vasospasm - mcc morbidity
Hydrocephalus
Investigation
SAH - NCCT
Aneurysm - Angiography
Xanthochromia in CSF
Treatment
Surgery - coiling, clipping
Nimodipine - (-)Vasospasm
Maintain HTN, Hypervolemia, Hemodilution
Berry aneurysm
Mc site: ACA - Acom junction
Mc site of rupture: Basilar bifurcation
SDH
Rupture of cortical bridging veins
Slow progressing deficit
CT - concavoconvex opacity
EDH
Rupture of MMA
Fast progressing deficit
Lucid interval (+)
CT - Biconvex opacity
Myasthenia Gravis
Mc ocular > facial(snarling) > skeletal(proximal)
DTR(n)
Investigation
Screening test: Ice pack test
Specific test: AchR Antibodies
Sensitive test: Single fibre EMG → ↑Jitter
Treatment
Ach inhibitors - pyridostigmine
Immunosuppression: M.crisis - IVIG/Plasmapharesis
Thymectomy
Lamberton eaton myasthenic syndrome
Mc ass. Small Cell Ca lung
Defect: presynaptic ca2+ channel
Weakness: skeletal
DTR (-)
Treatment: 3,4 DiAmini Pyridine
Alzheimer’s diseases
Amyloidosis:
APP(precursor)(chr21)→Aβ42 (enzyme secretase: chr 1, 14)
ApoE4(chr19) →(-) excretion
Atrophy - temporal & parietal
Ammesia
Neurofibrillary tangles α severity
Senile plaques α Age
Tau - neurodegeneration marker
Anterograde amnesia
Anomic aphasia
Apraxia
Fronto Temporal Dementia
Capgras syndrome
Amnesia
Tau proteins
Normal pressure hydrocephalus
Hakims triad
Gait ataxia
Urinary incontinence
Dementia
Huntington chorea
AD inheritance
Chorea
Dementia
Box car ventricles
Treatment: Tetrabenazine (DA depletor)
Wernicke’s encephalopathy
Global confusion
Ophthalmopathy (1st to improve)
Ataxia
Creutzfeld jackob disease
Mc - Startle myoclonus
Spongiform degeneration
Cortical ribboning
Pseudotumor cerebri
Young obese female
Headache
↑ICT
Papilledema
No FND
Mc - Idiopathic
Iatrogenic - ↑Vit.A
↓CSF absorption
Treatment
Acetazolamide
Tension headache
Dull aching
Depression
DOC: TCA
Migraine
Pulsatile
U/L
Nausea(+)
Aura (+) - classical
Aura (-) - common
Treatment
Triptans (doc)
Nsaids
CGRP(-) - gepants
> 4 attacks in a month - Prophylaxis
β blockers
CCB
TCA
Cluster headache
Clustered attacks
Periorbital pain
Lacrimation
Treatment
O2 @ 10-12L/min x 10 - 15 mins
Sumatriptan 6mg s/c
Prophylaxis - verapamil
Pyogenic menigitis
Mcc in adolescent & epidemics - N. Meningitidis
Mcc in adults/elderly & CAM - S. Pneumoniae
Neonates & elderly - Listeria
Kernigs sign
Brudzinki sign
Fever
Headache
Neck rigidity
CSF - Turbid, ↑cell count(N>L), ↑proteins, ↓↓glucose
Treatment
Dexa and antibiotics
Fever
Tubercular meningitis
Basal exudates
Tuberculoma
Infarct
CSF: cobweb appearance, cell count (L>N), ↑↑proteins, ↓glucose
Treatment
ATT x 12-18 months
Steroids x 2 months
HSV encephalitis
Fever
Altered sensorium
Seizure
CSF: Xanthochromic,cell count(L>N), ↑protein, glucose(n)
Neurocysticercosis
Agent - Taenia solium
Human - definitive host
Pig - intermediate host
Seizure
Headache
Hydrocephalus
Stages
Vesicular
Colloid - edema+++
Calcified - edema(-)
Treatment
Steroids→Albendazole
Anti epileptics
Guillian barre syndrome
Acute Inflammatory demyelinating polyneuropathy
IgG Anti GM1 a/b - schwann cells - demyelination
Post infectious - C.jejuni
Ascending paralysis
Areflexia
Absent fever
Other forms:
AMAN(children), AMSAN(Adults) - IgG Anti GM1 a/b - Nodes of Ranvier - Axonal degeneration
(Severe form) Miller Fisher Syndrome - Ataxia, Areflexia, Ophthalmoplegia - Anti GQ1 antibody - demyelination/axonal degeneration
Investigation:
Nerve conduction - loss of F wave
CSF - ↑Albumin, cell count(n)
Treatment
IVIG/Plasmapharesis within 14 days
Steroids not used
Multiple sclerosis
U/L optic neuritis
Weakness
Sensory symptoms
Types
Relapsing MS 90%
Primary progressive MS 10%
Secondary progressive MS 2%
Investigation:
MRI: Dawson fingers
CSF: ↑IgG levels, oligoclonal bands
VEP: ↑latenct
Treatment:
Steroids - Acute attack
IFN β - DOC
Natalizumab - best - ↓relapses
Neuromyelitis optica
B/L optic neuritis
Transverse myelitis
Aquaporin 4 antibodies
Syringomyelia
Dissociated anesthesia - capeflag distribution
Cuts spinothalamic
Spares posterior column
Conus medullaris syndrome
Saddle anesthesia
Knee jerk++
Autonomous Bladder