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tandoorichicken
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On average, what is the diameter of a human muscle fiber (say, a bicep muscle)?
Diameter: Muscle diameter is an information particularly in infant and children.
Normal variation:
The normal range of muscle diameter is around 40-100 micron. Because of the shrinkage artifact introduced by paraffin embedding, it is more reliable to assess fiber diameter and variation in fiber diameter in frozen sections. Paraffin embedding will induce a 30% reduction in diameter. As high as up to 30% reduction in size has been claimed but I suspect that this is an over estimation. A 10-20% reduction is a better estimate.
Proximal muscles have larger mean fiber diameter (85-90 micron) for power generation.
Distal muscles have a smaller mean fiber diameter (20 micron) for fine coordination.
In general, fiber diameter is smaller in children and elderly and larger in active adults.
Muscle fibers in man are usually larger (may be up to 10 mm) than fibers in women.
The diameter of human muscle fiber in the bicep can vary depending on a person's age, gender, and fitness level. On average, the diameter ranges from 10-100 micrometers. However, larger muscle fibers can reach up to 1000 micrometers in diameter.
The diameter of muscle fiber is directly related to its strength. Generally, the larger the diameter, the stronger the muscle fiber will be. This is because larger muscle fibers have a higher number of myofibrils, which are responsible for muscle contraction.
Yes, the diameter of muscle fiber can change through a process called hypertrophy. This occurs when the muscle is subjected to regular resistance training, causing an increase in the size of muscle fibers and ultimately, an increase in muscle strength.
There are several factors that can affect the diameter of muscle fiber, including genetics, age, gender, and physical activity. Additionally, certain medical conditions and hormonal imbalances can also impact the diameter of muscle fiber.
The diameter of muscle fiber is typically measured using a microscope and specialized software. A muscle biopsy is taken from the bicep or another muscle group, and the diameter of individual muscle fibers is then measured and recorded.