40 Questions
Which muscle is responsible for upward rotation of the scapula?
Serratus Major
Which of the following muscles is NOT a scapulothoracic joint elevator?
Lower trapezius
What is the primary function of the Rotator Cuff muscles?
To stabilize the shoulder joint
Which muscle is responsible for internal rotation of the shoulder?
Subscapularis
Which muscle is a synergist during shoulder flexion?
Supraspinatus
Which of the following muscles is responsible for scapular retraction and downward rotation?
Rhomboids
Which muscle is responsible for external rotation of the shoulder?
Infraspionatus
Which muscle is responsible for shoulder extension?
Latissimus dorsi
What type of joint is the scapulothoracic joint?
Anatomical false joint
During shoulder elevation, which movement occurs at the glenohumeral joint?
Anterior translation
What is the role of the rotator cuff in shoulder movement?
Secondary stabilizer
Which joint is responsible for upward and downward rotation of the shoulder?
Scapulothoracic joint
What is the function of the subacromial bursa in the shoulder joint?
Avoiding friction
Which of the following is NOT a movement possible at the scapulothoracic joint?
Flexion
What is the type of movement occurring at the glenohumeral joint during flexion?
Fixed point, no rolling or sliding
Which ligaments limit the movement at the acromioclavicular joint?
Conoid and trapezoid ligaments
What is the primary function of the subclavius muscle in the Scapulothoracic Joint?
To stabilize the clavicle
During shoulder elevation, which of the following movements occurs in the Scapulothoracic Joint?
Upward rotation of the scapula
In the first stage of shoulder flexion (0-30/60°), which of the following muscles are primarily involved?
Anterior deltoids, coracobrachialis, and clavicular pectoralis major
What is the primary role of the rotator cuff muscles in shoulder flexion?
To stabilize the glenohumeral joint
During shoulder rotation, which of the following planes of motion is involved?
Horizontal plane
What is the significance of the scapula following the path of the clavicle during shoulder movements?
It allows for smooth and coordinated movement of the shoulder complex
What is the name of the joint that is involved in the third stage of shoulder flexion (120-180°)?
Glenohumeral joint
During bilateral flexion of the shoulder, what is the resulting action on the spine?
It produces lumbar lordosis
What happens when there is no ABD slide?
The humerus is compressed against the coracoacromial arch
What is the main difference between ABD in the frontal plane and scapular plane?
One has structural compression and the other does not
What is the result of simultaneous glide and roll of the head of the humerus?
The head rolls over a smaller surface
What is the total range of motion for shoulder abduction?
180 degrees
What is the function of the Conoid and Trapezoid ligaments?
To stabilize the AC joint statically
What are the two types of stabilizers of the AC joint?
Static and dynamic
What is the function of the Supraspinatus action?
To glide and roll the head of the humerus
What does the scapula do to contribute to the total range of motion of shoulder abduction?
It upwardly rotates 60 degrees
What is the primary action of the rhomboids during scapular movement?
Scapular adduction
Which muscle group is responsible for the first stage of global abduction, from 0-90 degrees?
Deltoids and supraspinatus
What is the primary function of the serratus anterior muscle during shoulder movement?
Upward rotation of the scapula
Which muscle is responsible for external rotation of the shoulder, from 60-70 degrees?
Infraspinatus and teres minor
What is the primary action of the subscapularis muscle during shoulder movement?
Internal rotation of the shoulder
Which muscle group is responsible for the second stage of global abduction, from 90-150 degrees?
Serratus anterior and upper trapezius
What is the primary action of the teres major muscle during shoulder movement?
Internal rotation of the shoulder
During global abduction, what is the primary action of the adductor muscles?
Eccentric contraction
Quiz about the movements of the scapulothoracic joint, including osteokinematics and arthrokinematics, and the roles of the subclavius muscle and articular disc. Learn about scapular elevation, depression, protraction, retraction, and upward rotation.
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