Neurology Flashcards
What is a hemi-Parkinsonian gait?
Parkinsonian gait with reduced arm swing on 1 side
What gait is most commonly seen in stroke? Describe it.
Hemiplegic gait: 1 leg is stiffly extended and swung to avoid toe catching
In what condition would you expect a high-stepping gait?
Peripheral neuropathy - tabes dorsalis
How might you test for impaired proprioception?
Romberg’s test
Describe Romberg’s test and what a positive result looks like
Stand with feet together and eyes closed. Swaying or falling indicates a positive Romberg’s.
What are the 2 most common causes of “black outs”?
Seizures and Syncope
Describe the typical history of syncope
Prodrome: feeling light headed before <30 seconds unconscious Quick recovery Urine incontinence No tongue biting
What are the brains excitatory and inhibitory neurotransmitters?
Glutamate and GABA
How do you treat status epilepticus?
Benzodiazipines
How do benzodiazepines work to treat status epilepticus?
Enhance GABA
How long until a seizure becomes status epilepticus?
> 5 minutes
First line treatment of focal epilepsy?
CARBAMAZEPINE
First line treatment of generalised epilepsy?
VALPROATE
Which 2 areas of the brain are responsible for consciousness?
Cortes and Reticular Activating System of the brain stem
What is an infratentorial lesion? What may cause it?
Lesion below the tentorium cerebelli - tumour
How may a supratentorial lesion cause coma/brain death?
Increased pressure causes herniation
Give examples of supratentorial lesions which may cause herniation
subarachnoid haemorrhage, subdural haematoma, extradural haematoma
What are the most common causes of coma?
Drug overdose and head trauma
Supportive management of coma?
ABC, DVT prophylaxis, NG tube, Catheter
What may cause coma with neck stiffness?
Subarachnoid Haemorrhage and Meningitis
What do focal neurological signs suggest in a comatose patient? What would you use to treat the problem?
Herniation
Drugs to reduce intracranial pressure: Mannitol and dexamethasone
What are the most common causes of coma without neck stiffness, focal signs or fever?
Drug overdose and hypoglycaemia
What are the 3 diagnostic criteria for brain death?
- Irreversible cause
- Unresponsive patient with no function
- Brain stem death
Describe the Doll’s Head Eye Maneuver.
Open eyes and move head: if the eyes watch the ceiling the brain stem is intact, POSITIVE result
If the eyes are fixed in the head, brain stem is not intact - NEGATIVE result