Neurology Flashcards
Examples of neuropathic pain
1) Post-hermetic neuralgia.
2) Trigeminal neuralgia.
3) Prolapsed intervertebral disc.
4) Diabetic neuropathy.
Next step if the patient did not improve on one agent (patient with neuropathic pain?)
Switch to another agent. Don’t add
What agent can be used as a rescue therapy for neurpathic pain?
Tramadol
Examples of agents used in neuropathic pain?
- Gabapentin, Doluxetin, pregabalin, Amitryptylin.
First line agent for trigeminal neuralgia?
Carbamezapine
Topical capsaicin can be used in?
Post-herpetic neuralgia
associated with chromosome 9 GAA mutation?
Friedrich ataxia
Affect cerebellum and spinal cord, causing wide gait + absent reflex
Friedrich ataxia
Shortness of breath, lower limb weakness improve with activity, dryness and impotence. Antibody?
Antibody against presynaptic Voltage gated calcium channel (VGCC)
Lambert eaton syndrome
Other features: hyporeflexia, difficulty micturation
VS MG:
- Improve with activity.
- No ophthalmoplagia.
Association of lambert eaton and cancer?
SCC
Lambert eaton management?
1) Treat underlying cause (malignancy).
2) Steroid and azathioprine.
3) K channel efflux blockers 3,4-diaminopyridine on trials now
Pathophysiology of Lambert eaton
1) Antibody blocks Pre-synaptic calcium channel. (VGCC)
2) Lead to decrease calcium influx
3) Impair Ach release in NMJ
Featuers of autonomic neuropathy
1) Failure to decrease HR After deep breath
2) Postural hypotension
3) Inability to sweat and impotence
4) Pupils: dilate following adrenaline installation.
Diseases associated with autonomic neuropathy
1) Parkinson. 2) DM 3) GBS 4) Multisystem atrophy
5) Drugs: TCA, anti hypertensive agents.
6) Infections: HIV, neurosyphilis and chagas disease
7) Cranipharyngoma
rise in protein with a normal white blood cell count (albuminocytologic dissociation) - found in 66% suggest?
GBS
Clinical features of GBS
1) Sensation:
- Stock and glove appearance.
- Back and limb pain.
2) Motor dysfunctions: - Facial nerve palsy. - Areflexia. - Ascending symmetric paralysis. 3) Autonomic dysfunction: - Respiratory failure. - Cardiac arrest Fluctuation in BP.
Types of subdural hemorrhage?
1) Acute
2) Sub-acute
3) Chronic
Etiology of subdural hemorrhage?
Rupture of the bridging veins
Mention 5 risk factors for SAH
1) Aneurysmal rupture (berry aneurysm).
2) Mycotic aneurysm.
3) Pituitary apoplexy.
4) Coarctation of aorta.
5) APCKD
3 CAUSED BY Aneurysm: APCKD, Berry, mycotic
How to differ between the types of subdural hemorrhage?
1) Onset 3 days, 3 to 20. More than 20 days.
2) CT:
Acute: hyperdense bright
Chronic: hypodense dars
3) Clinically:
- Acute: coma.
- Chronic: memory loss
CT findings of Subdural hemorrhage?
Cross suture lines.
Role of LP in SAH?
Negative CT after 6 hours of symptoms.
Shows Xanthochromia.
Next step if you suscpect re-bleeding in SAH
- Usually occur within 12 hours.
- Do head CT STAT
Next step after confirming SAH by CT?
Digital substraction angiogram (looking for aneurysmal rupture as it is the most common cause)
4 complications of SAH
1) Re-bleeding.
2) Hydrocephalus.
3) SIADH
4) Delayed cerebral ischemia (vasospasm)
Next step if you suscpect vasospsm?
- It occur usually after 1 to 2 weeks.
- Ensure euvolemia.
- Use of vasopressor if needed.
Poor prognostic factors of GBS? 5
- age > 40 years
- poor upper extremity muscle strength
- previous history of a diarrhoeal illness (specifically Campylobacter jejuni)
- high anti-GM1 antibody titre
- need for ventilatory support
Chromosome p3 mutation.
Von-hipped lindau disease (mutation in chromosome p3 short arm)
VHL predispose the patient to?
1) Cerebellar and retinal hemangioma.
2) Clear renal cell cancer.
3) Renal cyst.
4) Extra-renal cyst (pancreas and liver)
5) Pheochromocytoma
trinucleutide repeat disorder causes mutation in chromosome 4
Huntington disease
In huntington disease there is repeat expansion of? which lead to degeneration of GABAnergic and cholinergic neurons in?
CAG
Basal ganglia
Mention 5 causes of chorea
1) Ataxic talengactesia.
2) Wilson disease
3) HD
4) Thyroitoxicosis.
5) Chorea gravidarum.
6) Autoimmune: APS and SLE
7) Med’s: anti-pshycotic and levodopa.
8) PCV
9) CO Poisining.
Mutation in ATM gene?
Ataxic talengacteisa
AR condition
While HD is AD
Trinucleutide repeat disorder mutation in GAA
Fredrich ataxia
whild HD mutation in CAG
This area ‘forms’ the speech before ‘sending it’ to Broca’s area. Lesions result in sentences that make no sense, word substitution and neologisms but speech remains fluent - ‘word salad’
Comprehension is impaired
Wernikie
It is typically supplied by the superior division of the left MCA. Lesion lead to which type of aphasia?
Broca
Speech is non-fluent, laboured, and halting. Repetition is impaired
Comprehension is normal. Which type of aphasia?
Broca
Speech is fluent but repetition is poor. Aware of the errors they are making
Comprehension is normal. Type of aphasia?
Speech is fluent but repetition is poor. Aware of the errors they are making
Comprehension is normal