Shoulder Girdle

Question 1

Shoulder Girdle

Answer 1

Entire upper extremity (UE) depends on shoulder girdle. It’s only attachment of UE to axial skeleton is via the scapula through the clavicle at the SC joint.

Question 2

Bones included

Answer 2

Scapula & Clavicle

Question 3

Sternoclavicular joint

Answer 3

Arthrodial (multiaxial) Provides the same amount of movement posteriorly & anteriorly. Provides more movement superiorly than inferiorly.

Question 4

Sternoclavicular supporting ligaments

Answer 4

Anterior SC ligament, Posterior SC ligament, Costoclavicular & Interclavicular ligaments

Question 5

Acromioclavicular

Answer 5

Arthrodial classification, 20- to 30-degree total gliding & rotational motion. Accompanies other shoulder girdle & joint motions

Question 6

Acromioclavicular supporting ligaments

Answer 6

Coracoclavicular ligaments: Conoid (medial) & trapezoid (lateral), Superior acromioclavicular ligament, Inferior acromioclavicular ligament

Question 7

Scapulothoracic

Answer 7

Movement depends on SC & AC joints which allow

the scapula to move - no ligamentous support; supporting via muscles

Question 8

Shoulder girdle movements

Answer 8

Abduction, Adduction, Downward rotation, Upward rotation, depression, elevation

Question 9

Shoulder girdle functions

Answer 9

Stabilize scapula, contract to move girdle & enhance movement of upper extremity,

Question 10

Movements of Scapula

Answer 10

Lateral tilt (abduction), medial tilt (adduction), anterior tilt (upward), posterior tilt (doward)

Question 11

Shoulder girdle muscles

Answer 11

Trapezius, rhomboid, levator scapula, serratus anterior, pectoralis minor. Do not attach to humerus & do not cause shoulder joint actions.