The ability to noninvasively assess voluntary muscle effort has wide application in physiologic studies, sports and rehabilitation medicine, as well as movement science. Traditionally, surface electromyography (sEMG) has been used for such assessments, but sEMG has several significant limitations arising from the fact that an estimate of muscle mechanical effort is being obtained from an electrical potential measurement made at the skin surface. As a result, it can be difficult to compare recordings from different muscles on the same person, on the same muscle over a period of days or weeks, or between the same muscle on different individuals. In addition, muscle fatigue studies are difficult as EMG activity tends to increase with increasing fiber recruitment, even though muscle effort is decreasing.
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To overcome the limitations associated with using sEMG recordings to evaluate muscle effort, an increasing number of investigators have come to rely upon vibromyography (VMG), or the recording of muscle fiber vibrations, to estimate muscle effort levels2. The development of microelectromechanical (MEMS) accelerometers has contributed greatly to this transition as extremely sensitive, very low noise sensors are now available at reasonable cost. VMG can be used to evaluate muscle changes over time in a given individual or to compare between two populations the muscle effort required to complete a specific task. VMG transducers record vibration data received from microelectromechanical systems (MEMS) sensors and proprietary software. VMG provides a convenient means for assessing rehabilitation progress following sports injuries such as ACL tears due to its ability to be utilized under conditions which reflect the multi-segment, closed-chain activities associated with functional activities.
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MP36R System
Wired | VMG – Assess muscle effort
MP36R with AcqKnowledge plus 4 channel VMG system
MP36R System
Wired | VMG – Assess muscle effort
MP36R with AcqKnowledge plus 2 channel VMG system
MP160 System
Wired | VMG – Assess muscle effort
MP160 with AcqKnowledge plus 4 channel VMG system
MP160 System
Wired | VMG – Assess muscle effort
MP160 with AcqKnowledge plus 2 channel VMG system
MP36R System
MP36R System
MP160 System
MP160 System
Use this DSUB9 to RJ11 jack Output Adapter to map the analog output of an MP36 or MP36R to an RJ jack; allows stimulators designed with HLT-compatible connections to be connected to MP36/36R units. Control the STMTHERM, or other stimulators that have RJ11 input cables.
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