Station 6: The Shoulder

Question 1

Bones of the Shoulder Girdle:

Scapula

Name, Formation, Classify and Landmarks (9)

Answer 1

Name: Scapula

Classify: Flat

Formation: Intramembranous ossification

Landmarks:

• Acromion
• Coracoid Process
• Glenoid Cavity
• Subscapular Fossa
• Medial Border
• Superior border
• Lateral border
• Inferior border
• Superior angle

Question 2

Bones of the Shoulder Girdle:

Clavicle

Name, Formation, Classify and Landmarks (2)

Answer 2

Name: Clavicle

Classify: Flat

Formation: Intramembranous ossification

Landmarks:

• Acromial end (lateral)
• Sternal end (medial) (rounded, with point up)

Question 3

Joints of the Shoulder Girdle:

Name, Classification and actions of the 2 joints of the Shoulder Girdle

Answer 3

1. Acromioclavicular Joint
   - Synovial Plane Diathrotic Nonaxial
   - Elevation, Depression, Protraction, Retraction
2. Glenohumeral Joint
   - Synovial Ball and Socket Diathrotic Multiaxial
   - Rotation

Question 4

Ligaments of the Shoulder:

Name and purpose of the 5 ligaments

Answer 4

1. Coraco-acromial
   - Attaches the acromion to the coracoid process
   - Prevents superior dislocoation of the humerus
2. Coraco-humeral
   - Attaches coracoid process to the humerus
   - Holds weight of arm up
   - Supports the weight of the arm
3. Coraco-clavicular
   - Attaches coracoid process to the clavicle
   - Ensure scapula and clavicle move together
4. Acromio-clavicular ligament
   - Attaches acromion to the clavicle
   - Ensures scapula and clavicle move together
5. Glenohumeral
   - Attaches glenoid cavity to humerus
   - Surrounds the joint capsule