11 Questions
What is the scapula's position at rest?
Anteriorly tilted and internally rotated
What happens to the scapula during shoulder abduction?
It upwardly rotates and posteriorly tilts
Is external rotation of the scapula during shoulder abduction consistent?
Yes, but only in earlier ranges of shoulder abduction
What is the orientation of the scapula during shoulder abduction?
It is generally within or close to the scapular plane
Why does literature describing scapular motions with shoulder abduction vary?
Due to differences in the amount and/or plane of abduction studied and experimental methodology
Is the motion of the scapula during shoulder abduction simple or complex?
Complex
What is the fourth kinematic principle of abduction?
The motion of the scapula during shoulder abduction
What is the scapula's position during shoulder abduction at the end of the motion?
Posteriorly tilted and externally rotated
Is the scapula's external rotation during shoulder abduction significant?
Yes, but only in earlier ranges of shoulder abduction
What is the scapula's position during shoulder abduction at the beginning of the motion?
Anteriorly tilted and internally rotated
Is the scapula's motion during shoulder abduction consistent among individuals?
No, it varies significantly
Study Notes
- The fourth kinematic principle of abduction refers to the motion of the scapula during shoulder abduction.
- The scapula is anteriorly tilted and internally rotated at rest.
- As shoulder abduction proceeds, the scapula upwardly rotates and posteriorly tilts.
- The scapula may also externally rotate slightly, but this is highly variable.
- The net movement of the scapula is towards external rotation by the end of shoulder abduction.
- However, it may experience a slight net internal rotation movement in earlier ranges of shoulder abduction.
- The scapula remains oriented generally within or close to the scapular plane.
- Literature describing scapular motions with shoulder abduction varies considerably.
- Variability in data reflects differences in the amount and/or plane of abduction studied and experimental methodology.
- The motion of the scapula during shoulder abduction is complex and multifaceted.
Test your knowledge on the complex and multifaceted motion of the scapula during shoulder abduction with this quiz. From the fourth kinematic principle of abduction to the variability in data, this quiz covers it all. Brush up on your understanding of the scapula's orientation, rotation, and tilt during shoulder abduction, as well as the factors that contribute to differences in research findings. Put your knowledge to the test with this informative quiz.
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