10 Questions
Which muscles are categorized as elevators of the scapulothoracic joint?
Upper trapezius, levator scapulae, and rhomboids
What can happen if there is reduced muscular support of the shoulder girdle?
Damaging stress on other structures
How does abnormal scapular posture affect the shoulder complex?
It affects biomechanics negatively
Which muscles perform depression of the scapulothoracic joint?
Lower trapezius, latissimus dorsi, pectoralis minor, and subclavius
Which muscle stabilizes the SC joint?
Subclavius
How does the latissimus dorsi depress the shoulder girdle?
Indirectly
What can depressor muscles do for the upper extremity?
Increase overall functional length
Who can benefit from scapulothoracic depressors?
Persons with tetraplegia
Why is scapulothoracic posture analysis important?
It is important in shoulder clinical inspection
Which muscles are NOT categorized as depressors of the scapulothoracic joint?
Deltoids, serratus anterior, and supraspinatus
Study Notes
- Muscles of the scapulothoracic joint are categorized by their actions.
- Elevators include upper trapezius, levator scapulae, and rhomboids.
- Reduced muscular support of the shoulder girdle can cause damaging stress on other structures.
- Abnormal scapular posture affects the biomechanics of the entire shoulder complex.
- Depression of the scapulothoracic joint is performed by lower trapezius, latissimus dorsi, pectoralis minor, and subclavius.
- The subclavius muscle stabilizes the SC joint.
- The latissimus dorsi depresses the shoulder girdle indirectly.
- Depressor muscles can increase the overall functional length of the upper extremity.
- Scapulothoracic depressors are useful for persons with tetraplegia.
- Scapulothoracic posture analysis is important in shoulder clinical inspection.
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