Muscles - Trunk

Question 1

External abdominal oblique

Answer 1

Compresses abdominal wall, laterally rotates waist

Question 2

Internal abdominal oblique

Answer 2

Compresses abdominal wall, laterally rotates waist

Question 3

Transverse abdominal

Answer 3

Compresses abdominal waist, laterally rotates waist

Question 4

Rectus abdominus

Origin and insertion

Answer 4

Flexes vertebral column, compresses abdominal wall

Origin: crest of pubis, pubic symphysis
Insertion: costal cartilages 5-7, xiphoid process

Question 5

Serratus anterior

Answer 5

Abducts scapula (moves scapula away from spinal column)

Question 6

External intercostals

Answer 6

Elevates ribs (increases volume in thorax)

Question 7

Internal intercostals

Answer 7

Elevates and depresses ribs

Question 8

Diaphragm

Answer 8

Inspiration

Question 9

Erector spinae  (outside to in)
iliocostalis, longissimus, spinalis

Answer 9

Extends and rotates vertebral column and head

Question 10

Quadratus lumborum

Answer 10

Extends and abducts vertebral column

Question 11

Rhomboid major and

Rhomboid minor

Answer 11

Adducts scapula

Question 12

Splenius

Answer 12

Extends and rotates head