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Questions and Answers
Which joint is classified as a fake joint in the shoulder complex?
Which joint is classified as a fake joint in the shoulder complex?
What is the range of motion for shoulder flexion?
What is the range of motion for shoulder flexion?
Which muscle is primarily responsible for shoulder abduction?
Which muscle is primarily responsible for shoulder abduction?
Which joint involves reciprocal engagement in its structure?
Which joint involves reciprocal engagement in its structure?
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Which of the following muscles contributes to shoulder extension and internal rotation?
Which of the following muscles contributes to shoulder extension and internal rotation?
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What is the clinical significance of the Ball Abduction External Rotation test?
What is the clinical significance of the Ball Abduction External Rotation test?
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During the Overhead Snatches test, what is the primary outcome measured?
During the Overhead Snatches test, what is the primary outcome measured?
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What muscle deficiency is indicated by the results of the Push-Up Claps test?
What muscle deficiency is indicated by the results of the Push-Up Claps test?
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In the Drop Catches test, what position is maintained while performing the task?
In the Drop Catches test, what position is maintained while performing the task?
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Which test involves trying to jump between sides while in a push-up position?
Which test involves trying to jump between sides while in a push-up position?
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What is the performance requirement for the Ball Taps test?
What is the performance requirement for the Ball Taps test?
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What clinical significance is associated with the Modified Closed Kinetic Chain Upper Extremity Stability Test?
What clinical significance is associated with the Modified Closed Kinetic Chain Upper Extremity Stability Test?
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What is the weight of the ball used in the Overhead Snatches test?
What is the weight of the ball used in the Overhead Snatches test?
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Study Notes
Shoulder Joint Complex: Anatomical Considerations
- Glenohumeral Joint: A ball-and-socket joint (enarthrodial) formed by the humeral head and glenoid cavity.
- Scapulothoracic Joint: A false joint, not a true synovial joint, allowing for scapula movement on the thorax.
- Acromioclavicular Joint: A plane joint (arthrodial) linking the acromion and clavicle.
- Sternoclavicular Joint: Links the clavicle, manubrium of the sternum, and the first rib.
- Subacromial/Subdeltoid Joint: A false joint, not a true synovial joint between the deltoid muscle and the supraspinatus tendon.
Range of Motion
- Flexion: 180 degrees
- Extension: 45-50 degrees
- Abduction: 180 degrees
- Adduction: 30-45 degrees
- Internal Rotation: 90 degrees
- External Rotation: 90 degrees
Main Shoulder Muscles
- Biceps brachii: Shoulder flexion
- Trapezius: Scapular rotation
- Pectoralis major: Shoulder flexion, adduction, internal rotation
- Deltoid: Anterior (flexion, internal rotation), Middle (abduction), Posterior (extension, external rotation)
- Subscapularis: Shoulder abduction, internal rotation
- Supraspinatus: Shoulder abduction, external rotation
- Infraspinatus: Shoulder external rotation
- Teres major: Shoulder extension, adduction, internal rotation
- Teres minor: Shoulder adduction, external rotation
Tests
- Ball Abduction External Rotation Test: Evaluates rotator cuff strength by having the patient lift a ball while the elbow is in a flexed position. Significant weakness is revealed in the rotator cuff muscles.
- Drop Catches: Assesses reaction time and internal rotation range of motion. Reduced repetitions indicate issues with reaction speed or internal rotation.
- Ball Taps: Evaluates shoulder stability. Decreased repetitions suggest stability problems.
- Overhead Snatch Test: Measures shoulder muscle strength during dynamic movement. Fewer repetitions indicate weakness.
- Push-up Claps: Assesses stability and strength. Reduced repetitions reveal issues with stability and strength.
- Line Hops: Assesses mobility and stability, lower repetition suggests a lack of mobility and lack of stability.
- Side Hold Rotation: Assesses shoulder mobility and stability during a side plank. Fewer repetitions reveal problems in mobility and stability.
- Modified Closed Kinetic Chain Upper Extremity Stability Test (MCKUES): Evaluates stability in a push-up position with various hand positions. Fewer successful repetitions indicate stability issues.
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Description
Test your knowledge on the anatomical features of the shoulder joint complex. This quiz covers key joints, range of motion, and major shoulder muscles involved in movement. Perfect for students of anatomy or those interested in human physiology.
