Muscle Activation, Contraction and Interaction Video

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.

Custom Search 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 Human Body Index Human Body Video Index Science Video Science Main Index		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.