Chapter 3 The Shoulder

The articulation formed by the clavicle and the scapula is often referred to as the

AC joint

External rotation of the humerus will cause the scapula to

Adduct

The distal-lateral end the spine of the scapula is known as the coracoid process.

False

The pectoralis major muscle has two distinct parts: an interior portion known as the sternal part and a superior portion known as the humeral part.

False

Two ligaments known as the conoid and the trapezoid ligaments that join the scapula and the clavicle together are commonly called the acromioclavicular ligament.

False

When all three portions of the deltoid muscle contract together, at the same time, the shoulder joint moves into extension.

False

A broad superficial muscle of the low back located lateral and inferior to the trapezius and a powerful internal rotator of the shoulder joint is known as the latissimus dorsi.

True

The coracoid process is found on the scapula.

True

The generally accepted ratio of movement between the glenohumeral joint and the scapula (known as scapulohumeral rhythm) is this: For every 2° of glenohumeral joint abduction, the scapula rotates 1°.

True

The glenoid fossa (shoulder joint socket) is located on the lateral aspect of the scapula.

True

The muscle known as the "initiator" of shoulder joint abduction is the supraspinatus.

True

In addition to assisting with flexion of the shoulder joint, the long-head tendon of the biceps brachii also assists with what other movement of the shoulder joint?

abduction

External rotation of the humerus will cause the scapula to

adduct

The short-head tendon of the biceps brachii muscle is cojoined with the tendon of origin of the

coracobrachialis

The long head of the biceps brachii originates on the very superior aspect of the

glenoid fossa

The pectoralis major muscle has attachments to the sternum, clavicle, and

humerus

The shoulder joint is formed by the articulation of the scapula and the

humerus

The muscle that elevates the scapula and rotates the shoulder girdle downward is the

levator scapula

The deltoid tuberosity is located on the

midshaft of the humerus

A muscle that attaches to the humerus, sternum, and the clavicle is known as the

pectoralis major

Flexion of the shoulder joint is the primary function of the

pectoralis major

Which of the following muscles would not be considered an anterior muscle of the shoulder joint?

pectoralis minor

Abduction of the humerus will cause the scapula to

rotate upward

When the shoulder joint abducts to the point where the arm is raised above one's head, the shoulder girdle has to

rotate upward

The structure formed by the clavicle and the scapula (and also the sternum) is the

shoulder girdle

Which of the following muscles does not have its insertion on the rotator cuff?

teres major

The triangular-shaped muscle running from the top of the spinal column (C1) to the bottom of the thoracic spine (T12) is known as the

trapezius