#stayfitwithanand

Rhomboid major ORIGIN: spinous processes of T2-T5. INSERTION:  medial border of the scapula. ACTION: Rhomboid minor and Rhomboid major are working together as a whole to perform the movement. retract scapula (squaring shoulders), synergist with middle fibers of Trapezius. rotate glenoid cavity downward (lowering arm against resistance). stabilize scapula. NERVE SUPPLY: Dorsal scapular nerve

ORIGIN:  spinous processes of C7 & T1. INSERTION: medial border of the scapula. ACTION: Rhomboid minor and Rhomboid major are working together as a whole to perform the movement. retract scapula (squaring shoulders), synergist with middle fibers of Trapezius. rotate glenoid cavity downward (lowering arm against resistance). stabilize scapula. NERVE SUPPLY: Dorsal scapular nerve

It is a diamond-shaped quadrilateral Muscle. The trapezius has three functional parts: an upper (descending) part which supports the weight of the arm; a middle region (transverse), which retracts the scapula; and a lower (ascending) part which medially rotates and depresses the scapula. ORIGIN: occipital bone, ligamentum nuchae, spines of C7 - T12. INSERTION:  spine & acromion ofscapula, lateral 3rd of clavicle. ACTION: stablizes, raises, retracts & rotates scapula. adducts & retracts scapula (middle). elevates scapula or synergist to head extension (suprior). depresses scapula & shoulder (inferior). NERVE SUPPLY: Accesory nerve

Serratus anterior(boxer’s muscle) | SHOULDER MOVERS ORIGIN:  by series of muscle slips from ribs 1-9. INSERTION:  the anterior surface of the vertebral border of the scapula. ACTION:  an agonist to protract & hold scapula against the rib cage rotates scapula (inferior angle laterally & upward) abduct & raise arm & horizontal arm movements. NERVE SUPPLY: The long thoracic nerve.

ORIGIN:   costal cartilage of rib 1. INSERTION: groove on the inferior surface of the clavicle. ACTION:   stablizes & depresses pectoral girdle. NERVE SUPPLY :  Nerve to subclavius

ORIGIN:   the anterior surface of ribs 3-5 (or 2-4) INSERTION:   coracoid process of scapula ACTION: draws scapula forward & downward (ribs fixed). draws rib cage superiorly (scapula fixed). NERVE SUPPLY : Both pectoral nerves Supply to this muscle.