| Question | Answer |
| Trapezius origin | base of skull |
| trapezius insertion | posterior lateral third of clavicle, triangular space at base of scapular spine |
| Innervation for trapezius | spinal accessory nerve (cranial nerve XI) and branches of C3, C4 |
| Rhomboids origin | spinous process of seventh cervical (C7)l and first five thoracic vertebrae (T1-T5) |
| Rhomboids insertion | medial border of scapula below spine of scapula |
| Rhomboids innervation | dorsal scapular nerve (C5) |
| Latissimus dorsi origin | posterior crest of ilium, back of sacrum & spinous processes of lumbar and lower 6 thoracic vertebrae |
| Latissimus dorsi insertion | medial lip of intertubercular groove of humerus |
| Latissimus dorsi innervation | thoracodorsal nerve (C6-C8) |
| Deltoid anterior fibers origin | anterior lateral third of the clavicle |
| Deltoid middle fibers origin | lateral aspect of the acromion |
| Deltoid posterior fibers origin | inferior edge if spine of scapula |
| Deltoids insertion | deltoid tuberosity on the lateral humerus |
| Deltoids innervation | axillary nerve (C5, C6) |
| Pectoralis major UPPER fibers origin | medial half of anterior surface of clavicle |
| Pectoralis major LOWER fibers origin | anterior surface of costal cartilages of the first 6 ribs and adjacent potion or sternum |
| Pectoralis major insertion | flat tendon 2 or 3 inches wise to lateral lip of intertubercular groove of humerus |
| Pectoralis major UPPER fibers innervation | lateral pectoral nerve (C5-C7) |
| Pectoralis minor LOWER fibers innervation | medial pectoral nerve (C8, T1) |
