| Muscle |
Origin |
Insertion |
Nerve |
Action |
Notes |
| trapezius |
occipital bone, ligamentum nuchae,
spine of C7, thoracic vertebral spines |
lateral third clavicle,
acromion, spine of the scapula |
Motor: accessory, Sensory: C3, C4 |
elevate scapula
pull medially
pull medial border downwards |
|
| latissimus dorsi |
iliac crest, lumbar fascia, spines of lower 6 lumber
vertebra, lower 3-4 ribs, inferior angle of scapula |
floor of bicipital
groove |
thoracodorsal |
Extends, adducts, medially rotates arm |
|
| rhomboid minor |
ligamentum nuchae, spine of C7 and T1 |
Medial border of scapula |
Dorsal scapular |
raises medial border scapula upward and medially |
|
| rhomboid major |
spines of T2 to T5 |
|