Muscle Activity Assessment
Muscle Activity Assessment - Related Videos
14:02
Ex Vivo Assessment of Contractility, Fatigability and Alternans in Isolated Skeletal Muscles
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Cited by 53 •
2012
We describe a method to directly measure muscle force, muscle power, contractile kinetics and fatigability of isolated skeletal muscles in an in vitro system using field stimulation. Valuable information on Ca2+ handling properties and contractile machinery of the muscle can be obtained using different stimulating protocols.
09:37
Evaluation of Respiratory Muscle Activation Using Respiratory Motor Control Assessment (RMCA) in Individuals with Chronic Spinal Cord Injury
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Cited by 18 •
2013
The purpose of this publication is to present our original work on a multi-muscle surface electromyographic approach to quantitatively characterize respiratory muscle activation patterns in individuals with chronic spinal cord injury using vector-based analysis.
05:31
Non-invasive Assessment of Dorsiflexor Muscle Function in Mice
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Cited by 12 •
2019
Measurement of rodent skeletal muscle contractile function is a useful tool that can be used to track disease progression as well as efficacy of therapeutic intervention. We describe here the non-invasive, in vivo assessment of the dorsiflexor muscles that can be repeated over time in the same mouse.
04:06
Setup for the Quantitative Assessment of Motion and Muscle Activity During a Virtual Modified Box and Block Test
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2024
The protocol described here aims to enhance the quantitative evaluation of upper limb deficits, with the goal of developing additional technology for remote assessment both in the clinic and at home. Virtual reality and biosensor technologies are combined with standard clinical techniques to provide insights into the functioning of the neuromuscular system.
06:46
In Vivo Functional Assessment of Rat Masseter Muscle Following Surgical Creation of a Volumetric Muscle Loss (VML) Injury
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Cited by 1 •
2024
Volumetric muscle loss (VML) injuries exceed endogenous regenerative ability, resulting in permanent functional deficits. Current VML research primarily focuses on limb and trunk muscles. To extend mechanistic studies of VML to craniofacial muscles, this article describes an in vivo method for longitudinal assessment of masseter muscle function pre- and post-VML injury.
FAQs
Electromyography, or EMG, detects electrical signals associated with motor-unit recruitment. Because motor units are activated as muscles produce movement and force, these signals provide an indicator of neuromuscular activation. Interpreting EMG alongside functional measurements helps engineers examine how activation relates to movement, force production, and overall muscle performance in a human-machine system.
EMG describes electrical activation, whereas force and motion measurements describe mechanical output and movement behavior. Examining these data together helps distinguish muscle activation from the resulting force production or functional performance. This combined perspective is useful when evaluating neuromuscular control, analyzing movement, or determining whether a device responds appropriately to the user’s physical actions.
Assessment results can show changes in muscle coordination, workload, and fatigue. Coordination describes how muscles contribute together during a task, workload reflects the demands placed on them, and fatigue indicates a change in functional capacity over time. These outcomes help characterize movement performance and provide evidence for biomechanics research, rehabilitation monitoring, and ergonomic evaluation.
Engineers use muscle activity data to quantify neuromuscular control and evaluate how people interact with machines or assistive technologies. The results can guide the design of prostheses, orthoses, wearable devices, and ergonomic systems. By relating muscle behavior to device function, designers can work toward technologies that are safer and more responsive to human movement.
A high-level workflow includes measuring muscle activation, interpreting the resulting data, and relating those findings to functional performance. EMG may be collected with force, motion, or physiological measurements when a broader analysis is needed. The resulting comparison can characterize muscle operation, coordination, workload, fatigue, or force production during the movement being studied.
The approach is useful when researchers need to connect biological muscle behavior with movement or technology performance. Applications include biomechanics research, rehabilitation monitoring, human-machine interaction studies, and development of prostheses, orthoses, wearable devices, or ergonomic systems. It can also support safer technology design by revealing how muscle workload and coordination change during functional tasks.