During testing of quadriceps activity with the patient in a prone position,the therapist notes a low-frequency signal.What is the cause of this type of artifact?

Question

Quizplus · Accepted Answer

Movement of the electrodes often causes low-frequency signals or artifacts during electromyography (EMG) testing because it disrupts the stable contact between the electrode and the skin, leading to fluctuations in the recorded signal.

During Testing of Quadriceps Activity with the Patient in a Prone