The MyoVision system allows the objective quantification and documentation of spinal pain and soft tissue injury. The MyoVision system was developed by a NASA-trained scientist, and is considered the "gold standard" by the American Medical Association; it has also been acknowleged as valid by the Florida Supreme Court.

It helps provide answers to questions like:

This information is essential to doctors and patients who need to objectively document, when combined with appropriate clinical testing, to third party payors (insurance companies, workman's comp, medical examiners, etc) the best plan for further treatment, or that no futher treatment is indicated.

How it Works

The MyoVision system works by combining dynamic measurement of joint motion using two inclinometers (round black instruments in illustration) with simultaneous dynamic measurements (in microvolts) of paraspinal and/or sternocleidomastoid muscle activity (red and white wires in illustration). This surface electromyogram works in the same way as recording of cardiac muscle contactions in microvolts with ECG.

Shown here, lumbar flexion is being studied. Both cervical and lumbar flexion, extension, lateral flexion, and rotation are included in the complete test sequence.

The graphical presentation of the results provides definitive evidence of ligament pain resulting in muscle guarding, fasiculations, and/or abnormal muscle recruitment that cannot be "faked", thereby providing insight into the nature of the currently remaining problems.

Interpretation of Results

The normal data presentation for lumbar flexion is shown on the left - notice the smooth trace of muscle activity on the top left, and in particular that at end of range (full flexion), muscle activity drops to baseline as the torso is supported by ligaments rather than muscles. Also note the smooth, crisp trace of range of motion in the lower left trace. On the other hand, in the upper right trace, objective evidence of pain includes the jagged trace of muscle activity that does not drop to baseline at full flexion, although the range of motion obtained (bottom right) is very nearly the same as the normal case.

Theory

Pain experienced in motion leads to a muscular response commonly known as spasm, hypertonicity, or muscle guarding; studies have found that the simultaneous measurement of muscle guarding along with range of motion increases sensitivity and specificity of range of motion to pain (Geisser, et. Al. 2005, Journal of Pain). Muscle guarding is the body's natural defense mechanism in response to pain, and the DynaROM system objectively quantifies this muscular guarding in motion. This muscle guarding corresponds to 5-8% impairment in the AMA Permanent Guides to Impairment (5th edition).

On the other hand, range of motion on its own is a poor indicator of pain, as many patients have normal range of motion concomitant with significant muscle guarding and pain.

Unlike needle EMG, which is used to evaluate for nerve damage by looking at a single motor neuron, the DynaROM measures the region's response to pain by objectively measuring globally the involved region's (e.g. lumbar paraspinals) response to pain. The graphical presentation of the results provides definitive evidence of pain (muscle guarding, fasiculations, racheting, and abnormal muscle recruitment) that cannot be "faked", and provides insight into the nature of the remaining problems.

Cost

Complete Myovision testing of cervical and lumbar flexion, extension, lateral flexion, and rotation, including a color print-out of the data and a 15 minute oral review is $75, while a written interprative report is an additional $150, payable at time of service (no contingency or leins accepted).


References