9.5-MuscleAction - Movesci 230 Human Musculoskeletal...

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Movesci 230 Human Musculoskeletal Anatomy Muscle Action
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Neural Drive Joint Geometry Muscle Dynamics Multi-Joint Dynamics EMG – electrical activity Force made Torque Acceleration Velocity Angle The movement that results from muscle action depends on the balance of all torques acting on body: ΣΤ = Ια
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Muscle Action During Movement Identify direction of movement Identify direction of load torque (gravity) Identify direction of muscle torque Identify muscle group responsible for muscle torque Compare direction of muscle torque and movement
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Muscle Action During Movement Identify direction of movement Observe movement and name it Remember relationship between movement direction and muscle length Flexors shorten during flexion* Flexors lengthen during extension*
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Muscle Action During Movement Identify direction of movement Identify direction of load torque Load torques are other torques acting on the body Gravity torque is the effect of gravity on the body Gravity is the only load torque that we will consider in this class
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Muscle Action During Movement
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