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Q
function of extrafusal fibers
I'm a seasoned industrial engineer with a keen interest in machine learning. Here to share insights on latest industry trends.
Extrafusal fibers are the primary muscle fibers responsible for generating force and movement. They are innervated by alpha motor neurons and contract when stimulated, thereby moving the bones they are attached to. These fibers make up the bulk of the muscle tissue and are crucial for executing voluntary movements, such as walking, lifting, or jumping. Unlike intrafusal fibers, which are part of the muscle spindle and involved in proprioception (sensing the position and movement of the body), extrafusal fibers focus on the actual contraction of the muscle. Their activity is finely controlled by the nervous system to ensure precise movements, and their strength and efficiency can be enhanced through exercise and training. By constituting the main force-generating component of muscles, extrafusal fibers play a vital role in the motor functions of the body.
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