muscular system week 1 (muscles that move the pectoral girdle)

Question 1

pectoralis minor

Answer 1

location: anterior muscle of the chest, originates medially on the upper ribs and inserts laterally on the scapula
action: depresses and protracts the scapula

Question 2

trapezius

Answer 2

location: posterior muscle of the upper back, it originates medially at the occipital bone, lower cervical and thoracic vertebrae and inserts on the clavicle and scapula
action: superior portion elevates scapula and clavicle and extends the head; middle portion adducts scapula; inferior portion depresses scapula

Question 3

levator scapulae

Answer 3

location: posterior muscle of the upper back, originates on the upper cervical vertebrae and inserts on the superior portion of the vertebral border of the scapula
action: elevates the scapula

Question 4

rhomboid major

Answer 4

location: posterior muscle of the upper back that originates on the upper thoracic vertebrae and inserts on the vertebral border of the scapula
action: elevates adducts and inferiorly rotates the scapula

Question 5

rhomboid minor

Answer 5

location: posterior muscle of the upper back that originiates on the lower cervical and upper thoracic vertebrae and inserts on the vertebral border of the scapula
action: elevates adducts and inferiorly rotates the scapula

Question 6

serratus anterior

Answer 6

location: originates on ribs 1-9 and inserts on vertebral border and inferior angle of scapula
action: abducts scapula and rotates it superiorly. “boxers muscle”