Voluntary activation of the quadriceps muscle involves the conscious activation of the muscle using a conscious thought.
What is muscle?Muscle is a type of tissue found in the body that is made up of cells that can contract and relax. Muscles enable movement of the body, enable breathing, and help to maintain posture. Muscles are made up of proteins, and are found in the walls of blood vessels, the skin, and the digestive and urinary tracts.
This process generally takes a fraction of a second and is much faster than the reaction time for involuntary activation. Involuntary activation of the quadriceps muscle involves the reflexive activation of the muscle without conscious thought. This process usually takes a few hundred milliseconds longer than voluntary activation.
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