Investigations

Question 1

CT neuro usage?

Answer 1

acute trauma and haemorrhage

Question 2

Is neuro CT usually contrast?

Answer 2

Usually given with contrast to help enhance tumours, infections and infarcts.

Question 3

What is purpose of T1 weighted MRI?

Answer 3

T1 weighted images enhance acute haemorrhage

Question 4

What is the purpose of T2 weighted MRI

Answer 4

T2 weighted images enhance oedema, infarction, demyelination, chronic haemorrhage

Question 5

What is an EEG?

Answer 5

Electrodes placed on the scalp; electrical activity of the brain recorded. Important in epilepsy evaluation.

Question 6

What are evoked potentials?

Answer 6

Electrical potentials measured while nerves are repeatedly stimulated; commonest use is in visual evoked potentials to diagnosed MS.

Question 7

What are nerve conduction studies?

Answer 7

Nerves stimulated and electrical activity measured from different points; conduction velocity can be recorded.

Question 8

What is an EMG?

Answer 8

Electromyography records the electrical potentials from needle electrodes in muscle at rest and during contraction; can differentiate neuropathic and myopathic disorders

Question 9

Where is LP fluid obtained from?

Answer 9

Needles inserted into the spinal column between L3/4 or L4/5

Question 10

What is a tensilon test?

Answer 10

Short acting anticholinesterase (edrophonium) given IV to see if there is improvement in those with suspected myasthenia gravis