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Questions and Answers
What are the external forces involved in gait analysis?
What are the external forces involved in gait analysis?
- Inertia, friction, and air resistance
- Muscle force, joint torque, and body weight
- Inertia, gravity, and ground reaction force (GRF) (correct)
- Muscles, ligaments, tendons, and joint capsules
What does the line of gravity (LOG) represent?
What does the line of gravity (LOG) represent?
- An imaginary vertical line from the center of gravity to the ground (correct)
- A horizontal line representing the body's equilibrium
- A line connecting the joints in the body
- The path traced by the body's center of mass during motion
When does a gravitational torque get created around a joint axis?
When does a gravitational torque get created around a joint axis?
- If the LOG passes at a distance away from the joint axis (correct)
- If the body experiences external forces
- If the body is in motion
- If the LOG passes directly through the joint axis
Which components primarily assist muscles by resisting, transmitting, and absorbing forces?
Which components primarily assist muscles by resisting, transmitting, and absorbing forces?
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What happens if the line of gravity (LOG) passes directly through a joint axis?
What happens if the line of gravity (LOG) passes directly through a joint axis?
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Study Notes
External Forces in Gait Analysis
- External forces involved in gait analysis include gravity, ground reaction forces, and frictional forces.
Line of Gravity (LOG)
- The line of gravity (LOG) represents a vertical line passing through the body's center of mass.
Gravitational Torque
- A gravitational torque is created around a joint axis when the line of gravity (LOG) does not pass through the joint axis.
Components Assisting Muscles
- Bones, ligaments, and joint capsules are components that primarily assist muscles by resisting, transmitting, and absorbing forces.
Line of Gravity (LOG) and Joint Axis
- If the line of gravity (LOG) passes directly through a joint axis, no gravitational torque is created around that joint axis, and muscles do not need to generate a torque to balance the gravity.
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