What does the EMG method primarily involve?

Correct answer is B) EMG, or Electromyography, primarily involves evaluating the electrical activity in muscles. It is a diagnostic technique that records the electrical potential generated by muscle cells during contraction and at rest. A) Incorrect. Measuring blood pressure in the extremities is not the primary function of EMG. C) Incorrect. Assessing brain wave patterns using electrodes is characteristic of an EEG (Electroencephalogram), not EMG. D) Incorrect. Imaging internal organs with sound waves is a description of ultrasound, not EMG.