In Vivo Muscle Testing
In Vivo Muscle Testing - Related Videos
07:13
Applications of In Vivo Functional Testing of the Rat Tibialis Anterior for Evaluating Tissue Engineered Skeletal Muscle Repair
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Cited by 20 •
2016
We describe an in vivo protocol to measure dorsiflexion of the foot following stimulation of the peroneal nerve and contraction of the anterior crural compartment of the rat hindlimb. Such measurements are an indispensable translational tool for evaluating skeletal muscle pathology and tissue engineering approaches to muscle repair and regeneration.
09:16
Simultaneous ex vivo Functional Testing of Two Retinas by in vivo Electroretinogram System
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Cited by 36 •
2015
Ex vivo ERG can be used to record electrical activity of retinal cells directly from isolated intact retinas of animals or humans. We demonstrate here how common in vivo ERG systems can be adapted for ex vivo ERG recordings in order to dissect the electrical activity of retinal cells.
09:44
Manual Muscle Testing: A Method of Measuring Extremity Muscle Strength Applied to Critically Ill Patients
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Cited by 135 •
2011
Survivors of acute respiratory distress syndrome (ARDS) and critical illness frequently develop long-lasting muscle weakness. Manual muscle testing (MMT) is a standardized clinical examination commonly used to measure strength of peripheral skeletal muscle groups. This video demonstrates MMT using the 6-point Medical Research Council scale.
12:03
In Vivo Model for Testing Effect of Hypoxia on Tumor Metastasis
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Cited by 6 •
2016
This manuscript describes the development of an animal model that allows for the direct testing of the effects of tumor hypoxia on metastasis and the deciphering the mechanisms of its action. Although the experiments described here focus on Ewing sarcoma, a similar approach can be applied to other tumor types.
09:34
In Vivo Canine Muscle Function Assay
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Cited by 19 •
2011
We describe a minimally-invasive and painless method to measure canine hindlimb muscle strength and muscle response to repeated eccentric contractions.
FAQs
Controlled electrical or neural stimulation provides a defined input, allowing measured contractions to be related to the activation of muscle and its neural control. Researchers can then compare force, torque, contraction speed, or fatigue under consistent conditions. This separation of input from outcome helps identify whether performance changes arise from muscle function, neuromuscular activation, or an engineered intervention.
Physiological conditions preserve interactions that isolated tissue or cell models cannot fully reproduce. Measurements collected in this setting show how an intervention behaves while muscle activity remains linked to whole-organism performance. Maintaining defined conditions also improves comparisons between experimental groups, helping researchers distinguish intervention-related effects from changes caused by the testing environment.
These measurements describe different aspects of performance rather than a single outcome. Force and torque indicate the mechanical output produced by contraction, contraction speed characterizes how rapidly performance develops, and fatigue shows how output changes during continued activity. Examining them together gives a broader functional profile for comparing muscle states, models, or engineered treatments.
A basic workflow establishes defined physiological conditions, applies controlled electrical or neural stimulation, and records the resulting functional response. Depending on the study objective, the recording may focus on force, torque, contraction speed, or fatigue. Researchers then compare these measurements across conditions to determine how muscle performance changes in the living system.
The approach supplies functional evidence for biomaterials and tissue-engineered muscle beyond structural or cellular characterization alone. By measuring performance in a living organism, researchers can assess whether an engineered construct contributes to usable muscle function under realistic biological conditions. These results help connect material or tissue design choices with whole-organism outcomes relevant to bioengineering.
Functional measurements provide performance data for assessing prosthetic or rehabilitation technologies and for checking whether computational models reflect biological behavior. They also connect muscle structure and activity with outcomes observed in the organism. In bioengineering, this combination supports translational evaluation by showing how a technology or model relates to measurable neuromuscular performance rather than isolated laboratory behavior.