Muscle Activation, Contraction and Interaction Video

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Muscular System Video:

Muscular System Video Index

Abdominal Muscle Video

Ankle Muscle Video

Arm Muscle Video

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Cartilage Video

Elbow Muscle Video

Foot Muscle Video

Hand Muscle Video

Head and Face Muscle Video

Hip Muscle Video

Joint Video

Knee Muscle Video

Leg Muscle Video

Ligament Video

Motor Development Video

Muscle and the Nervous System Video

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Muscle, Tendon, Bone Connection Video

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Neck Muscle Video

Reflexes Video

Shoulder Muscle Video

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Precise muscle control involves muscle activation and contraction, and the interaction of multiple muscles to control body movement. Muscle control can be voluntarily, controlled by your thoughts, such as moving your arm. Other muscles, such as the heart or digestive system, are involuntary muscles that work without any conscious control by us. Voluntary muscles are activated through action potentials, electrical impulses from nerves. This activation triggers a chemical reaction causing muscle fibers to contract. The more muscle fibers that contract, the more powerful the muscle contraction. Since muscles can only provide movement through contraction, they generally operate in pairs -- one in opposition to the another. When one muscle contracts, such as to bend the arm, the opposing muscle responsible, such as the muscle to straighten the arm, must relax. Interested in learning more about muscle control? Check out the following muscle control videos. For additional information, also see our muscle control reference materials.

 
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