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Thinking about your body from a Dancer’s point of view. Your body has a variety of systems that control different functions. The systems that contribute to movement are: The Nervous System The Skeletal System The Muscular System The Nervous System is the communication system of your body. Your brain sends electric impulses through nerves to initiate movement. Bones serve several functions: They provide support for the body Some protect vital organs Some produce red blood cells They also provide the “lever” for movement A lever is a rigid bar that moves a fixed point when effort is applied to it to move a resistance or load. So in your body: The lever is your bones The fixed point is your joints The effort is the contraction of a muscle Joints are the places where your bones meet. Bones are connected to each other by ligaments. There are a variety of types of joints in the body, and each allows for a different range of movement. Flexion- bending of a joint i.e. Arms moving from alongside the body to second position Adduction-moving towards center i.e. Assemble External rotationrotating outward i.e. straightening elbow Abduction- moving away from center i.e. bending elbow Extension- Straightening of a joint Internal rotationrotating inward i.e. turning in Plantar flexionpointing the foot i.e. turning out i.e. releve Dorsiflexion- flexing the foot i.e. rocking back on heels lifting forefoot There are several types of muscles: Cardiac Muscles Smooth Muscles Skeletal Muscles We are concerned with Skeletal muscles. These are the ones that create movement. Concentric Contraction- shortening of the muscle. Eccentric Contraction- lengthening of the muscle. Isometric Contraction- no change in length of muscle. Raising into releve-Concentric Holding in releve- Isometric Lowering from releve- Eccentric Agonists- the contracting muscles that produce movement Antagonists- a muscle that either lengthens to permit movement or co-contracts to support movement Synergist- help control movement, keep the body connected, help neutralize movement Stabilizers- muscles that fixate a joint. They hold a joint firm in order to allow other movement to occur. Sagittal plane- moving the arms from en bas to high fifth Frontal plane- bending at the side Transverse- twisting at the hip or waist Your body is a COMPLEX tool. Understanding basic principles of how your body works will allow you to move more confidently and efficiently. You must care for your tool. Proper alignment, control and breathing are very important. Your body is able to DEVELOP both strength and flexibility. DO NOT think that just because you can not do something exactly right the first time that you are unable to do it. IT TAKES HARD WORK AND PRACTICE PRACTICE PRACTICE!!!!