Intramuscular Fat
Intramuscular Fat - Related Videos
09:19
A Guide to Examining Intramuscular Fat Formation and its Cellular Origin in Skeletal Muscle
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Cited by 10 •
2022
The replacement of healthy muscle tissue with intramuscular fat is a prominent feature of human diseases and conditions. This protocol outlines how to visualize, image, and quantify intramuscular fat, allowing the rigorous study of the mechanisms underlying intramuscular fat formation.
02:47
Intramuscular (IM) Injection: Compound Delivery into the Dorsal Muscle of an Adult Zebrafish
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2023
This video describes the technique of intramuscular injection for delivering compounds into the dorsal muscles of an adult zebrafish.
12:28
Preparing and Administering Intramuscular Injections
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2017
Source: Madeline Lassche, MSNEd, RN and Katie Baraki, MSN, RN, College of Nursing, University of Utah, UT Intramuscular (IM) injections deposit medications deep into the muscle tissue. Since muscle fibers are well perfused, this route of administration provides quick uptake of the medication and allows for the administration of relatively large volumes. Skeletal muscles have fewer pain-sensing nerves than subcutaneous tissue, which allows for the less painful administration of irritating drugs...
03:31
Intramuscular Injections Along the Motor End Plates to Shuttle Tracers Directly into Rat Motor Neurons
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2025
Source: Mohan, R., et al. Intramuscular Injections Along the Motor End Plates: A Minimally Invasive Approach to Shuttle Tracers Directly into Motor Neurons. J. Vis. Exp. (2015)This video demonstrates the targeted delivery of a fluorescent neuronal tracer into motor neurons via intramuscular injection at the motor end plates (MEPs). It outlines the steps involved in preparing the rat, injecting the tracer, and assessing labeled motor neurons for neurotherapeutic potential.
10:57
Intramuscular Injections Along the Motor End Plates: A Minimally Invasive Approach to Shuttle Tracers Directly into Motor Neurons
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Cited by 20 •
2015
The efficacy of intramuscular uptake and retrograde transport of molecules to corresponding motor neurons depends on the location of the injection sites with respect to the motor end plates (MEPs). Here, we describe how to locate MEPs on skeletal muscles to optimise retrograde transport of tracers into motor neurons.
FAQs
The location of lipid storage creates two biologically relevant patterns: droplets within muscle fibers and adipose tissue between fibers. Intracellular stores can be considered alongside the fiber’s own metabolic activity, whereas deposits between fibers describe a different tissue arrangement. Distinguishing these patterns helps researchers interpret muscle quality and function rather than treating all lipid as equivalent.
Muscle cells can oxidize stored fatty acids to produce energy. This means intramuscular lipid is not only a deposited material; it can participate in muscle energy metabolism. The balance between storage and use therefore matters when researchers relate lipid content to muscle function or metabolic status, making fatty-acid use an important mechanism in biological studies.
Intramuscular fat accumulation does not reflect a single biological influence. It emerges from interactions among energy balance, aging, physical activity, genetics, and metabolic signaling. Considering these factors together helps explain why lipid content can vary among biological conditions and why measurements may be relevant to both muscle-quality research and studies of metabolic health.
Researchers assess intramuscular fat through histology, imaging, and biochemical analysis. Histology examines tissue organization, imaging supports assessment within muscle, and biochemical analysis provides measurements related to tissue composition. These approaches give researchers different ways to examine lipid distribution and quantity, supporting investigations of muscle structure, metabolism, and tissue quality.
In biology and health research, measurements of intramuscular fat are used to examine body composition, insulin sensitivity, muscle quality, and metabolic disease risk. Their value lies in connecting a tissue-level feature with broader physiological and health-related questions. Researchers can therefore treat this measurement as one characteristic when studying how muscle relates to metabolism and disease-related outcomes.
Meat scientists examine intramuscular fat because it contributes to flavor, tenderness, and overall product quality. This application differs from health research, which emphasizes body composition, insulin sensitivity, muscle quality, or metabolic disease risk. The same tissue feature therefore supports different interpretations depending on whether the study concerns biological function or the characteristics of meat products.