B2-pectoral girdle

What muscle is highlighted?

levator scapulae

What is the origin of levator scapulae?

transverse processes of the first 4 cervical vertebrae

What is the insertion of the levator scapulae?

vertebral border of scapula

What is the action of the levator scapulae?

elevates scapula

What muscle is this?

pectoralis minor

What is the origin of the pectoralis minor?

anterior surface of ribs 3 to 5

what is the insertion of the pectoralis minor?

coracoid process of the scapula

What is the action of the pectoralis minor?

depresses and abducts the shoulder; rotates the scapula laterally; elevates ribs if scapula is stationary

What are these muscle called?

rhomboid muscle

What is the origin of the rhomboid muscle?

spinous processes of lower cervical and upper thoracic vertebrae

What is the insertion of the rhomboid muscle?

vertebral border of scapula

What is the action of the rhomboid muscle?

adducts and rotates the scapula laterally

what muscle is this?

serratus anterior

what is the origin of serratus anterior?

anterior and superior margin of ribs 1-9

what is the insertion of serratus anterior?

anterior surface of the vertebral border of the scapula

what is the action of the serratus anterior

protracts the shoulder, abducts, and medially rotates scapula

What muscle is this?

trapezius

What is the origin of the trapezius?

occipital bone and spinous processes of the occipital vertebra

What is the insertion of the trapezius?

clavicle and scapula

what is the action of the trapezius?

depends on active region and the state of the other muscle, may elevate, adduct, depress, or rotate the scapula, and elevate clavithe cle can also extend the hyperextended neck