EMG Procedures & Techniques

Question 1

What is the primary purpose of a needle electrode in EMG testing?

Accepted Answer

To record muscle electrical signals

Answer

Needle electrodes are inserted into muscles to record electrical activity and assess neuromuscular function.

Question 2

Why is patient positioning important during EMG testing?

Accepted Answer

To ensure accurate recordings and patient comfort

Answer

Proper positioning ensures muscle relaxation or activation as needed and minimizes artifacts in EMG recordings.

Question 3

What does insertional activity refer to in an EMG procedure?

Accepted Answer

Initial electrical response upon needle insertion

Answer

Insertional activity is the brief burst of electrical activity seen when a needle electrode is inserted into a muscle.

Question 4

Which technique is used to evaluate nerve conduction velocity?

Accepted Answer

Nerve conduction study

Answer

Surface electrodes stimulate and record nerve impulses at two points to calculate the speed of nerve conduction.

Question 5

What is the typical response of a healthy muscle at rest during EMG?

Accepted Answer

Electrical silence

Answer

A healthy muscle at rest should exhibit electrical silence, indicating no abnormal spontaneous activity.

(EMG) Electromyography Certification Practice Test