neuro here we go Flashcards
Average age patient presents with Motor Neuron Disease?
60
Presenting symptoms with Motor Neuron Disease? (4)
Stumbling spastic gait
Foot drop
Weakness- can’t turn door handles
Dysphagia/ aspiration pneumonia
ie mixed UMN and LMN picture
Weeping or giggling inappropriately without mood change. Name symptom?
Pseudobulbar affect
What is seen in bulbar palsy, UMN or LMN signs?
LMN signs
Disease in cranial nerves
What is seen in pseudobulbar palsy, UMN or LMN signs?
UMN signs
Disease in Corticobulbar tract in brain
How do we differentiate Motor Neuron Disease from Multiple Sclerosis?
MND has no sensory loss
MS does
How do we differentiate Motor Neuron Disease from Myasthenia?
MND does not affect muscles of eye movement
Which drug slows the progression of Motor Neuron Disease?
Riluzole
What is the max score in each Glasgow Coma Score domain?
Eyes- 4
Verbal- 5
Motor- 6
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GCS 14 usually means?
Confused patient
Dementia/ Delirium/ Intoxication/ Concussion
What is the GCS of a confused patient?
14
Lowest possible GCS?
3
ya dead
Normal GCS?
15
What does a GCS of <8 mean? (3 domains)
Eyes closed
Non verbal
Some pain response
(requires airway protection!!)
What do patients with a GCS of <8 require?
Airway protection
Symptoms of Optic Neuritis? (3)
Pain on eye movement
Rapid loss of central vision
+/- colour vision loss
What is optic neuritis a common presentation of?
Multiple sclerosis
Oligoclonal bands in CSF but not serum suggest what?
CNS inflammation, suggestive of MS
How to treat MS relapse?
Methylprednisolone
Examples of disease modifying Multiple Sclerosis drugs?
Dimethyl fumarate (Tecfidera brand) Immunosuppression (monoclonal antibodies)
What criteria is used to diagnose Multiple Sclerosis?
McDonald criteria
Commonest first symptom in Multiple Sclerosis?
Vision loss
Sensory symptoms in Multiple Sclerosis? (3)
Abnormal sensation
Pins and needles
Can’t feel vibration
Motor symptoms in Multiple Sclerosis? (2)
Spastic weakness
Bowel/ bladder weakness
Neuropsychiatric impacts of Multiple Sclerosis?
Low mood
Amnesia
Corticospinal tract controls what?
Major spinal pathway involved with voluntary movements
What is Uhthoff’s phenomenon in Multiple Sclerosis?
Worsening of symptoms with increased temperature
Uhthoff- OOF HOT
Important fact about chronology of MS lesions?
Disseminated in space and time
ie >30 days between relapses, relapses affect different areas
Literal meaning of Myasthenia Gravis?
‘Grave’/Serious Muscle Weakness
What happens in Myasthenia Gravis at cellular level?
Autoimmune attack on post synaptic ACh receptors
Fewer receptors> harder to trigger action potential
Antibodies in Myasthenia Gravis?
anti- AChR (ACh receptor)
anti- MuSK (Muscle Specific Tyrosine Kinase)
Who gets Myasthenia Gravis with anti-MuSK antibodies?
Young women particularly
Who gets Myasthenia Gravis?
Women 20-30
Men 60+
First muscle group usually affected in Myasthenia Gravis?
Extraocular muscles
First symptoms in Myasthenia Gravis?
Ptosis
Double vision
In Myasthenia Gravis, which muscle group is affected after extraocular muscles?
Bulbar
Give some bulbar symptoms please (4)
Difficulty swallowing (dysphagia)
Slurred, difficult speech (dysarthria)
Difficulty chewing
Aspirating
Describe tendon reflexes in Myasthenia Gravis
Normal
Reflex is not enough time to fatigue muscle
Why are tendon reflexes normal in Myasthenia Gravis?
Reflex is not enough time to fatigue muscle
How to treat relapse of Myasthenia Gravis?
Prednisolone immunosuppression
Best long-term drug treatment in Myasthenia Gravis?
Anticholinesterase Inhibitors (-stigmine drugs)
Why are anticholinesterase inhibitors useful in Myasthenia Gravis?
Allows ACh to remain in synaptic cleft longer
Means action potential can be triggered with the remaining receptors
What type of hypersensitivity reaction is Myasthenia Gravis?
Type II
Surgical treatment in Myasthenia Gravis?
Thymectomy
Can be T-cell mediated
Define Myasthenic crisis
Weakness of respiratory muscles during relapse
Life threatening!
How do we treat Myasthenic crisis? (3)
Ventilate
Find and treat cause
Plasmapheresis to remove anti-AChR antibody
Which neuro disease is nearly inevitable in Down Syndrome?
Alzheimer’s Disease
In which chromosomal abnormality is Alzheimer’s Disease nearly inevitable?
Down Syndrome
Global degenerative cognitive decline, not limited to specific domain. Diagnosis?
Alzheimer’s Disease
Leading genetic cause of Alzheimer’s Disease?
Homozygosity for APOE4 allele
What neuro disease is there a 2x risk of in Heart Failure?
Alzheimer’s Disease
What makes diagnosis of Guillain Barré syndrome unlikely?
Asymmetry of weakness
Severe bladder/bowel involvement
Treat Guillain Barré syndrome?
IV Immunogloblin
What syndrome is characterised by euvolaemic hyponatraemia?
Syndrome of Inappropriate ADH secretion (SIADH)
What are the triad of symptoms seen in Viral Meningitis? (3)
Headache
Neck stiffness
Photophobia
What is characterised by headache, neck stiffness and photophobia?
Viral Meningitis
What type of inheritance is seen in Neurofibromatosis Type 1?
Autosomal Recessive
Although spontaneous development common
What symptoms accompany headache in Subarachnoid Haemorrhage? (4)
Neck Stiffness
Vomiting
Seizure
Loss of consciousness/ collapse
Commonest cause of Subarachnoid Haemorrhage?
Ruptured berry aneurysm (80%)
Commonest cause of Subarachnoid Haemorrhage, after ruptured berry aneurysm?
Arteriovenous malformation (15%)
Drug treatment to reduce vasospasm and bleeding in Subarachnoid Haemorrhage?
Nimodipine (Calcium Channel Blocker)
Surgical options in Subarachnoid Haemorrhage? (2)
Endovascular coiling (preferred) Surgical clipping (requires craniotomy)
Commonest cause of death in Subarachnoid Haemorrhage, after primary haemorrhage?
Re-bleeding
Treat Acute Subdural Haematoma?
Emergency craniotomy for decompression and homeostasis
Treat Chronic Subdural Haematoma?
Burr hole for drainage
Main symptom in Subdural Haematoma?
Fluctuating consciousness level
Apart from fluctuating consciousness level, list some other symptoms in Subdural Haematoma (4)
Headaches
Ataxia
Hemiparesis
Seizure
Due to compressive effects of haematoma
What are ataxia symptoms? (3)
Slurring
Incoordination
Stumbling/falling
Drug to reduce ICP?
Mannitol
Smoking cessation aid that increased the chance of seizures?
Bupropion
What happens if you do a Lumbar Puncture on a patient with raised ICP?
Coning of the Brainstem through the Foramen Magnum
Spike Wave abnormality on EEG suggests?
Generalised epilepsy (absence)
First line Tx in Primary Generalised Epilepsy?
Sodium Valproate
‘Domestos’ of epilepsy
Severe side effect of Lamotrigine?
Rash > Steven-Johnson Syndrome
First line for focal onset epilepsy?
Carbamazepine
Why is Carbamazepine not used in Primary Generalised Epilepsy?
Aggravates it
Why are side effects of Sodium Valproate more tolerated in men than women?
Teratogenic> men can’t have babies
Hair loss & weight gain> happens anyway to aging men 👴🍔👨🦲
Sodium Valproate is teratogenic. Name 2 more of its side effects
Hair loss
Weight gain
Usual cause of variable decelerations on CTG?
Umbilical cord compression
Pain and temperature sensing spinal tract?
Spinothalamic
How to definitively diagnose a brain mass?
Biopsy (same as any other mass)
Left -Right confusion suggests lesion where?
Dominant Parietal Lobe
eg Left Parietal if they are Right-handed
Unilateral pupil mydriasis, unresponsive to light. What type of herniation has occurred?
Uncal herniation
First symptom of Uncal herniation
Ipsilateral pupil dilation, unresponsive to light
Imagine a weird uncle poking you in the eye?
Commonest cause of non-communicating hydrocephalus?
Obstruction/ Stenosis
Who gets non-communicating hydrocephalus?
Young children
commonest reason for brain surgery in that age group
Raised ICP commonly causes palsy of what nerve?
Abducens, CNVI
Why is Abducens CNVI the cranial nerve most susceptible to changes in Intracranial Pressure? (2)
Long intracranial course
Anchored in Dorello’s canal ∴ prone to stretching
Abducens CNVI nerve palsy is an early sign of what?
Raised ICP
Headache associated with runny nose and runny eye on same side?
Cluster headache
autonomic symptoms