Vibromyography (VMG) has distinct benefits over EMG in that the recordings much more accurately reflect absolute muscle effort up to 100% maximum voluntary contraction. Correspondingly, VMG can be used to both evaluate muscle changes over time in a given individual or to compare between two populations the muscle effort required to complete a specific task. The ability to discriminate muscle effort changes depends on the precision and accuracy of the VMG under these two scenarios, that is, the intra-assay accuracy and variability and the inter-assay accuracy and variability. Here, we address the inter-assay variability of VMG recordings in healthy adult men, focusing on isometric contraction of an upper extremity muscle.
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Perfrom muscle effort assessments with Vibromyography (VMG) systems from BIOPAC.
VMG transducers record vibration data received from microelectromechanical systems (MEMS) sensors and proprietary software.
•– VMG amplitude increases monotonically with muscle effort •– Only one scaling factor required for all subjects •– Relationship is between ABSOLUTE effort and VMG
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MP36R System
Wired | VMG – Assess absolute isometric muscle effort
MP36R with AcqKnowledge plus 4 channel VMG system
MP36R System
Wired | VMG – Assess absolute isometric muscle effort
MP36R with AcqKnowledge plus 2 channel VMG system
MP160 System
Wired | VMG – Assess absolute isometric muscle effort
MP160 with AcqKnowledge plus 4 channel VMG system
MP160 System
Wired | VMG – Assess absolute isometric muscle effort
MP160 with AcqKnowledge plus 2 channel VMG system
MP36R System
MP36R System
MP160 System
MP160 System
Identify skin conductance responses, convert stim events from E-Prime SuperLab, Presentation, Vizard, etc., into AcqKnowledge events that can used for analysis, and score skin conductance responses using the AcqKnowledge automated EDA analysis tool.
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