IPHY 4540 Biomechanics • Objective: to learn how to quantitatively analyze the mechanical function of the human musculoskeletal system using principles of physics and physiology. • Topics: – Functional Anatomy – Tissue Biomechanics (muscle, tendon, bone) – Movement (kinematics) – Movement dynamics (kinetics) • Whole body, muscle and joint forces • Impulse, Momentum • energy, power • torque
IPHY 4540 Biomechanics. Objective: to learn how to quantitatively analyze the mechanical function of the human musculoskeletal system using principles of physics and physiology. Topics: Functional Anatomy Tissue Biomechanics (muscle, tendon, bone) Movement (kinematics) - PowerPoint PPT Presentation
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IPHY 4540 Biomechanics
• Objective: to learn how to quantitatively analyze the mechanical function of the human musculoskeletal system using principles of physics and physiology.
• Topics:– Functional Anatomy– Tissue Biomechanics (muscle, tendon, bone)– Movement (kinematics)– Movement dynamics (kinetics)
• Why do we usually see 3rd class levers in the body?
OR• Why do we have short muscle arms?
Anatomical Terms• Joint Position
– To discuss joint position we define joint angle
– joint angle: relative angle between two segments
• Joint Movement– Flexion: relative angle (joint
angle) decreases– Extension: relative angle
increases (straightening movement)
Hammill J, Biomechanical Basis of Human Movement
More muscle terms
agonistmuscles creating the same joint movement
antagonistmuscles opposing or producing the opposite joint movementmust relax to allow a movement to occur ORcontract to slow a movement downexample: kicking
co-contraction
1 joint vs. 2 joint muscles
Examples of 1 joint muscles:
Examples of 2 joint (biarticular) muscles:
Biarticular muscles
• Advantages
How do we stand up from a chair?
Joint actions:What muscles act across the hip?What muscles act across the knee?What muscles act across the ankle?All 1-joint muscles? All 2-joint muscles?