muscles of the torso

Question 1

move scapula forward, rotate scapula

Answer 1

Serratus Anterior
origin: ribs 1-8
insertion scapula

Question 2

elevate rib cage, aid in inspiration

Answer 2

External Intercostal

origin: inferior border of rib above
insertion: superior border of rib below

Question 3

depress rib cage, aid in expiration

Answer 3

internal intercostal

origin: superior border of rib below
insertion: inferior border of rib above

Question 4

prime mover of inspiration, flattens when contracts, lengthens thoracic cavity

Answer 4

Diaphragm

Question 5

flex and rotate vertebral column

Answer 5

Rectus abdominis

origin: pubic crest and symphysis
insertion: xiphoid process and ribs 5-7 (cartilage)

Question 6

flex and rotate vertebral column, trunk rotation and lateral flexion

Answer 6

external oblique

origin: ribs 5-12
insertion: pubic crest and iliac crest, linea alba

Question 7

same as external oblique

Answer 7

internal oblique

origin: iliac crest
insection: ribs 9-12 (cartilage), linea alba

Question 8

compress abdominal contents

Answer 8

transversus abdominis

origin: ribs 6-12
insertion: pubic crest, linea alba

Question 9

extend neck; raise, rotate, and adduct scapula

Answer 9

trapezius

origin: occipital bone and spinous process of thoracic vertebrae
insertion: acromion and spine of scapula

Question 10

arm extension, adduct and rotate arm

Answer 10

Latissimus Dorsi

origin: spinous process of T6-L5
insertion: humerus

Question 11

as a pair: extend neck and vertebral column.

singly: rotation

Answer 11

Erector spinae: longissimus, semispinalis, iliocostalis, spinalis

origin: transverse process of C7-T12
insertion: occipital bone and spinous process of cervical vertebrae.