Shoulder girdle Study guide

Upper Trapezius origin

external occipital protuberance along superior nuchal line

Upper trapezius insertion

acromion process and clavicle

upper trapezius primary actions

elevate scapula, upward rotation

upper trapezius secondary action

retract scapula

middle trapezius origin

C7, T1-T3 spinous process

middle trapezius insertion

superior scapular spine and acromion process

middle trapezius primary action

retract scapula, upwards rotation

middle trapezius secondary action

elevate scapula

lower trapezius origin

T4-T12 spinous process

lower trapezius insertion

base of scapular spine

lower trapezius primary action

retract scapula, depress scapula, upwards rotation

levator scapulae origin

C1-C4

levator scapulae insertion

medial border of scapula between spine and superior angle

levator scapulae primary action

elevate scapula

levator scapulae secondary action

downwards rotation

rhomboids origin

C7 T1-T5 spinous process

rhomboids insertion

medial border of scapula between spine and inferior angle

rhomboids primary action

retract scapula, downwards rotation,

Rhomboids secondary action

elevate scapula

serratus anterior origin

ribs 1-9

serratus anterior insertion

anterior surface on medial border of scapula

serratus anterior primary action

protract scapula

Pectoralis minor origin

Ribs 3-5

pectoralis minor insertion

coracoid process

pectoralis minor primary action

anteriorly tilt scapula