Week 7 Shoulder Girdle

Question 1

Scapula Bony Markings

Answer 1

Borders
1. Medial Border
2. Lateral Border
3. Superior Border
Angles
4. Inferior Angle
5. Superior Angle
Notch
6. Suprascapular Notch
Spine
7. Spine of Scapula
Processes
8. Acromion Process
9. Coracoid Process
Fossa
10. Glenoid Cavity/Fossa
11. Supraspinous Fossa
12. Infraspinous Fossa
13. Subscapular Fossa
Tubercles
14. Supraglenoid Tubercle
15. Infraglenoid Tubercle

Question 2

Humerus Bony Markings

Answer 2

1. Head
2. Capitulum
3. Trochlea
   Necks
4. Surgical Neck
5. Anatomical Neck
   Tubercles/Tuberosity
6. Greater Tubercle
7. Lesser Tubercle
8. Deltoid Tuberosity
   Fossa/Groove
9. Intertubercular Groove
10. Olecranon Fossa
    Epicondyles
11. Lateral Epicondyle
12. Medial Epicondyle

Question 3

Clavicle Bony Markings

Answer 3

Heads
1. Medial Head (Sternal end)
2. Lateral Head (Acromial End)

Question 4

Joints of Scapular Movement

Answer 4

1. Sternoclavicular (SC)
2. Acromioclavicular (AC)
3. Scapulothoracic/Scapulocostal
4. Glenohumeral

Question 5

Sternoclavicular Joint (SC)

Answer 5

• Synovial saddle joint
• only joint that connects that upper limb to axial skeleton
• Location: Clavicle to Manubrium of sternum
  (Stabilized by costoclavicular ligament)
• Movement:
• Elevation-Depression (40 degrees)
• Protraction-Reaction (35 degrees)
• Axial Rotation (20-40 degrees)

Question 6

Acromioclavicular (AC)

Answer 6

• Diarthrodial Joint
• Gliding Synovial Joint (MultiAxial)
• Location: Lateral end of Clavicle and (small facet on) acromion of scapula
  (Stabilized by coracoclavicular ligament, super and inferior Acromioclavicular ligament)
• Movements:
• Protraction - Retraction
• Elevation - Depression Axial Region

Question 7

Scapulothoracic/Scapulocostal

Answer 7

• not a true joint.
• Articulation of scapula gliding over posterior thoracic cage
• Location: Anterior Surface of scapula and posterolateral surface of ribcage.
• Movements:
• Elevation - Depression
• Protraction - Retraction
• External Rotation - Internal Rotation

Question 8

Glenohumeral Joint

Answer 8

• Ball and Socket Synovial (highly movable)
• Locateion: Humeral head articulates with glenoid fossa
  (Stabilized by Rotator Cuff Muscles that attach to joint capsule, tendons of biceps and triceps)
• Movement:
• Abduction - Adduction
• Flexion - Extension
• External Rotation - Internal Rotation
• Horizontal Adduction (transverse Flexion)
• Horizontal Abduction (transverse extension)