Superficial EMG (electromyography) is a measurement tool that can be used in identifying specific weakness in muscles. Just as an electrocardiogram takes a picture of the electrical activity of the heart, superficial EMG can be used in identifying weakness using electrical measurement of the output of the muscles during functional activities. This is done by placing electrodes over the suspected weak muscles and testing during functional movement. Electromyography takes a reading from the electrial activity of the muscle and provides both a visible and audible scale of this muscle activity measured in micro volts.
This tool is especially useful in identifying specific weakness:
- Rotator cuff, shoulder injuries or impingements
- Knee dysfunction, especially patellofemoral (kneecap) joint dysfunctions
- Lumbar weakness specifically measured in the lowest part of the lumbar spine.
Once weakness has been identified by the evaluation using the superficial EMG, the device may be used to enhance exercise giving the patient visible and audible input during the functional activities. At times, the weakness is so significant that NMES (neuromuscular electrical stimulation) may be needed to further enhance the exercise. |
