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Flashcards in Clinical Neurophysiology Deck (12)
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1

What studies are undertaken in clinical neurophysiology?

Nerve conduction studies/ Electromyography (EMG)
EEG
Evoked potentials

2

What are nerve conduction studies used for?

Examine nerve function (conduction velocity and amplitude)

3

Where is ulnar neuropathy usually reported?

Most often at elbow, sometimes wrist

4

What is a sensory study?

Stimulation od sensory fibres in fingers, allows separate measurement of sensory and motor functions

5

What is investigated when looking for ulnar neuropathy?

Conduction block/ slowing due to demyelination

6

What is Myaesthenia Gravis?

Antibodies to post-synaptic ACh receptor decrease the effectiveness of released ACh

7

What are the cancel features of Myaesthnia Gravis?

Weakness
Fatigue
Normal sensation
Diplopia
Ptosis

8

How is Myaesthenia Travis detected?

Detect antibodies
Single fibre EMG

9

What is an EMG?

Looks at action potentials from whole motor units

10

How is single fibre EMG different?

Uses filter, sensitivity and timebase settings to isolate action potentials from individual muscle fibres within one motor unit

11

How is single fibre EMG useful?

Needle can be positioned to record from two fibres within same motor unit

12

In what conditions are EEGs used in diagnosis?

Epilepsy
Altered states of consciousness
Non-epileptic attacks