Pectoral Girdle

Question 1

Structure and function of the clavicle and scapula (both anterior and posterior views).

Question 2

Muscles of the pectoral girdle
anterior

muscle - s
origin - r 1
insertion - c
action - damcaahspg

muscle - p
origin - r 2-3, 3-5, 2-4
insertion - cpos
action - asarid

muscle - sa
origin - ribs 1-8 or 1-9
insterion - vbaiaos
action - asariu

Answer 2

subclavius
rib 1
clavicle
depresses and moves clavicle anteriorly and helps stabilize pectoral gridle

pectoralis minor
ribs 2-5, 3-5, or 2-4
coracoid process of scapula
abducts scapula and rotates it downward

serratus anterior
ribs 1-8 or 1-9
vertebral border and inferior angle of scapula
abducts scapula and rotates it upward

Question 3

Muscles of the pectoral girdle
posterior

muscle - t
origin - snloob, l, n, as of c7-t12
insertion - clavicle and acromion and spine of scapula
action -

muscle - ls
origin - transverse process of c1-c4
insertion - svbos
action - esarid

muscle - rm
origin - sot2-t5
insertion - vbosits
action - eaasarid, ss

muscle - rm
origin - soc7-t1
insertion - vbossts
action - eaasarid, ss

Answer 3

trapezius
superior nuchal line of occipital bone, ligamentum nuchae, and spines oc c7-t12
clavical and acromion and spine of scapula

levator scapulae
transverse process of c1-c4
superior vertebral border of scapula
elevates scapula and rorates it downward

rhomboid major
spines of t2-t5
vertebral border of scapula inferior to spine
elevates and adducts scapula and rotates it downward, stabilizes scapula

rhomboid minor
spines of c7-t1
vertebral border of scapula superior to spine
elevates and adducts scapula and rotates it downward, stabilizes scapula