9 Questions
What is the main factor responsible for the rotation of the pelvis during walking?
Eccentric activation of the hip abductors on the stance limb
What happens to the left iliac crest during weight acceptance on the right lower extremity?
It drops below the height of the right iliac crest
What is responsible for the elevation of the left iliac crest from 20% to 60% of the gait cycle?
Concentric activation of the hip abductors on the swing limb
How does the shift of the trunk toward the right side assist in the elevation of the left iliac crest?
By reducing external torque demands on the right hip abductors
What is responsible for the elevation of the left iliac crest on the swing limb?
Pelvic-on-femoral adduction and abduction on the stance limb
What is the role of the right hip abductors in controlling the downward motion of the left side of the pelvis?
Eccentric activation
What is the significance of observing pelvic motion during walking?
It helps in diagnosing gait abnormalities
What is the range of pelvic rotation during walking?
10-15 degrees
What is responsible for the rotation of the pelvis during pelvic-on-femoral adduction and abduction?
Gluteus medius
Study Notes
- Frontal plane motion of the pelvis during walking can be observed by watching the iliac crests rise and fall in relation to the horizontal plane.
- The pelvis rotates about 10-15 degrees due to pelvic-on-femoral adduction and abduction on the stance limb.
- During weight acceptance on the right lower extremity, the left iliac crest drops below the height of the right iliac crest due to pelvic-on-femoral adduction of the right stance hip.
- The downward motion of the left side of the pelvis is controlled by eccentric activation of the right hip abductors.
- From 20% to 60% of the gait cycle, the left iliac crest is elevated by concentric activation of the right hip abductors.
- This is assisted by a slight shift of the trunk toward the right side, reducing external torque demands on the right hip abductors.
- The elevation of the left iliac crest on the swing limb is the result of pelvic-on-femoral abduction of the right stance hip.
- Throughout the swing phase on the right, a similar pattern occurs with the right iliac crest.
- This pattern of pelvic motion is important for maintaining balance during walking.
- Observing pelvic motion can be useful in diagnosing gait abnormalities.
Test your knowledge of pelvic motion during walking with this informative quiz. Learn about the specific movements and muscle activations involved in maintaining balance during gait. Explore the role of the iliac crests and the effects of pelvic-on-femoral adduction and abduction on the stance limb. Discover how observing pelvic motion can be helpful in identifying gait abnormalities. Whether you're a healthcare professional or simply interested in biomechanics, this quiz is a great way to deepen your understanding of human movement.
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