Practice Quiz

PTA Physical Therapy Assistant

Category - Therapeutic Modalities

Start a Study Session Sign up for Question of the Day
If a patient can produce a sufficient muscle EMG recording, what is the reason they still can’t achieve any function of that muscle?
  1. Movement artifact
  2. Volume conduction artifact
  3. Noise
Explanation
Answer: B - Volume conduction artifacts are the reason for the false recording.

Volume conduction artifacts result when the signals from nearby muscles are sampled by surface electrodes. The prevention of these artifacts can be achieved by first inhibiting the antagonists and then by facilitating the agonists.

Movement artifacts are recorded when the muscles are weak and amplification is high.

Unwanted electrical signals are called noise. Lowering the noise betters the recording.
Was this helpful? Upvote!
Login to contribute your own answer or details
Start a Study Session Sign up for Question of the Day

Top questions

Related questions

Most popular on PracticeQuiz