| | | | Answer |
|---|
| 1. | Origin: Occipital bone and spinous processes of thoracic vertebrae
Insertion: Scapula and clavicle
Action: Elevation, superior rotation, inferior rotation, and depression of scapula | |
| |
| 2. | Origin: Spinous processes of lower thoracic vertebrae, iliac crest, lower ribs
Insertion: Intertubercular groove and lesser tubercle of humerus
Action: Adduction and extension of the arm at the shoulder | |
| |
| 3. | Origin: Subscapular fossa
Insertion: Lesser tubercle of humerus
Action: Medial rotation of the arm at the shoulder | |
| |
| 4. | Origin: Supraspinous fossa
Insertion: Greater tubercle of humerus
Action: Abduction of the arm at the shoulder | |
| |
| 5. | Origin: Infraspinous fossa
Insertion: Greater tubercle of humerus
Action: Lateral rotation of the arm at the shoulder | |
| |
| 6. | Origin: Lateral border of scapula
Insertion: Greater tubercle of humerus
Action: Lateral rotation of the arm at the shoulder | |
| |
| 7. | Origin: Scapula and clavicle
Insertion: Deltoid tuberosity of humerus
Action: Abduction, flexion, and extension of the arm at the shoulder | |
| |
| 8. | Origin: Clavicle, first six costal cartilages, and sternum
Insertion: Greater tubercle of humerus
Action: Flexion, adduction, and medial rotation of the arm at the shoulder | |
| |
| 9. | Origin: Long head - Supraglenoid tubercle (scapula); Short head - Coracoid process (scapula)
Insertion: Radial tuberosity
Action: Flexes forearm at the elbow; supinates forearm | |
| |
| 10. | Origin: Long head - Infraglenoid tubercle (scapula), Lateral head - Posterolateral humerus; Medial head - Posteromedial humerus
Insertion: Olecranon (ulna)
Action: Extends forearm at the elbow | |
| |