About Electromyography
Dr. Samuel Theagene, MD

Introduction
 Dr. Samuel Theagene is a diplomate of the American
Board of Physical Medicine and Rehabilitation. An
experienced doctor who works in pain management,
Samuel M. Theagene, M.D., delivers interventional
spine treatments aided by modern techniques like
electromyography.
A diagnostic tool designed to assess neuromuscular
function, the electromyography (EMG) allows
doctors to observe muscles in terms of the tissue’s
electric stimulation. This is important because nerves
determine muscle movement using electric current.

Electromyography
 Therefore, the EMG helps describe the relationship
between the nerves and the muscles.
During the EMG procedure, a doctor inserts a very fine
needle directly into the muscle in question. The needle
acts as an “electrode,” a probe sensitive to electric
current. The activity detected by the electrode is
expressed visually through an “oscilloscope” and
sonically through an amplifier.
In a normal muscle, very little registers on the
oscilloscope or amplifier except when the patient flexes
his or her muscles. In abnormal muscle tissues, electrical
signals register consistently during the EMG, even when
the muscle is at rest.