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

Back Muscle Video

Cardiac Muscle Video

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

Muscle Control Video

Muscle Exercise Video

Muscle Fiber Video

Muscle, Tendon, Bone Connection Video

Muscle Type Video

Muscular System Overview Video

Neck Muscle Video

Reflexes Video

Shoulder Muscle Video

Thoracic Muscle Video

Vertebral Muscle Video

Muscular System Index

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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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