Superficial muscles origin, insertion, action, innervation
Serratus posterior inferior- Innervation
Anterior rami of T9-T12
Serratus posterior superior- Innervation
Anterior rami of spinal nerves T2-T5.
Trapezius- action
Elevation, depression, retraction, and upward rotation of scapula. Extends and laterally flexes neck.
Latissimus dorsi- action
Extends, adducts, and medically rotates the humerus.
Serratus posterior inferior- action
Depresses ribs 9-12. Proprioception.
Levator scapulae- Innervation
Dorsal scapular nerve
Rhomboid major- Innervation
Dorsal scapular nerve
Rhomboid minor- Innervation
Dorsal scapular nerve
Levator scapulae- action
Elevates and downward rotates the scapula. Laterally flexes the neck.
Serratus posterior superior- action
Elevates ribs 2-5. Proprioception.
Latissimus dorsi- insertion
Floor of intertubercular sulcus on anterior humerus.
Trapezius- insertion
Lateral third of clavicle, acromion process, and spine of scapula.
Rhomboid minor- insertion
Medial border of scapula (at level of spine)
Rhomboid major- insertion
Medial border of scapula (inferior to spine)
Trapezius- Innervation
Motor: spinal accessory nerve (cranial nerve XI). Sensory: anterior rami of C3-C4.
Rhomboid major- origin
Nuchal and supraspinous ligaments, spinous processes of T2-T5.
Serratus posterior superior- origin
Nuchal ligament and spinous processes of C7-T3
Rhomboid minor- action
Retracts and downward rotates scapula
Rhomboid major- action
Retracts and downward rotates scapula.
Serratus posterior superior- insertion
Ribs 2-5
Serratus posterior inferior- insertion
Ribs 9-12
Rhomboid minor- origin
Spinous processes of C7-T2.
Serratus posterior inferior- origin
Spinous processes of T11-L2
Latissimus dorsi- origin
Spinous processes of T7-T12, ribs 9-12, thoracolumbar fascia, and iliac crest.
Levator scapulae- insertion
Superior angle of scapula
Latissimus dorsi- Innervation
Thoracodorsal nerve
Levator scapulae- origin
Transverse processes of C1-C4.
Trapezius- origin
Superior nuchal line, nuchal ligament, external occipital protuberance, and spinous processes of C7 to T12.
