The Trunk

Question 1

Origin and Insertion of Iliocostalis Lumborum

Answer 1

O: Sacrum, 11th, 12th, and lumbar vertebrae, iliac crest, supraspinous ligament, and sacrum

I: Via tendon to lower six or seven ribs

Question 2

Origin and Insertion of Iliocostalis Thoracis

Answer 2

O: Via tendon from lower six ribs

I: Upper six ribs and transverse process of C7 vertebrae

Question 3

Origin and Insertion of Iliocostalis Cervicis

Answer 3

O: 3rd-6th ribs

I: Transverse processes of C4-C6 vertebrae

Question 4

Origin and Insertion of Longissimus Thoracis

Answer 4

O: Lumbar vertebrae and thoracolumbar fascia

I: Via tendons to all thoracic vertebrae and into lower nine or ten ribs

Question 5

Origin and Insertion of Longissimus Cervicis

Answer 5

O: Transverse processes of T1-T5

I: Via tendon to transverse processes of C2-C6 vertebrae

Question 6

Origin and Insertion of Longissimus Capitis

Answer 6

O: Via tendon from transverse processes of T1-T5 vertebrae, and articular processes and C4-C7 vertebrae

I: Mastoid process (deep)

Question 7

Origin and Insertion of Spinalis Thoracis

Answer 7

O: Via tendons from spinous process of L1-L2 and T11-T12

I: Spinous process of T1-T4/T8 vertebrae

Question 8

Origin and Insertion of Spinalis Cervicis

Answer 8

O: Ligamentum nuchae, C7 spinous process, and (sometimes) T1-T2 spinous processes

I: Spinous process of the Axis and (occasionally) C3-C4 spinous processes

Question 9

Origin and Insertion of Spinalis Capitis

Answer 9

O: Semispinalis Capitis m.

I: Between superior and inferior nuchal lines

Question 10

Origin and Insertion of Semispinalis Thoracis

Answer 10

O: Transverse processes of T3/T7-T12

I: Via tendons into spinous processes of C6-T4

Question 11

Origin and Insertion of Semispinalis Cervicis

Answer 11

O: Transverse processes of T5/T6 vertebrae

I: Spinous processes of C2-C5 vertebrae

Question 12

Origin and Insertion of Semispinalis Capitis

Answer 12

O: Transverse processes of C7-T7 vertebrae, and articular processes of C4-C6 vertebrae

I: Between superior and inferior nuchal lines

Question 13

Origin and Insertion of Multifidi (sacral)

Answer 13

O: Sacrum, posterior iliac spine, postero-sacroiliac ligaments

I: Spinous process of one vertebrae

Question 14

Origin and Insertion of Multifidi (lumbar, thoracic, and cervical)

Answer 14

O: Transverse processes of L5-C4

I: Spanning two to four vertebrae, inserted into spinous process of one vertebrae above from L5 to C2 (Axis)

Question 15

Origin and Insertion of Rotatores

Answer 15

O: Transverse process of vertebrae

I: Spinous process of vertebrae above

Question 16

Origin and Insertion of Splenius Cervicis

Answer 16

O: Spinous process of T3-T6 vertebrae

I: Transverse processes of C1-C3 vertebrae

Question 17

Origin and Insertion of Splenius Capitis

Answer 17

O: Ligamentus nuchae and spinous process of C7-T4 vertebrae

I: Inferior to superior nuchal line and mastoid process

Question 18

Origin and Insertion of Quadratus Lumborum

Answer 18

O: Iliolumbar ligament and iliac crest

I: Last rib and transverse processes of L2-L5

Question 19

Origin and Insertion of Rectus Abdominis

Answer 19

O: Pubic crest and symphysis

I: 5th-7th ribs and xiphoid of the sternum

Question 20

Origin and Insertion of External Oblique (anterior fibers)

Answer 20

O: Ribs 5-8 with serratus anterior

I: Linea alba

Question 21

Origin and Insertion of External Oblique (lateral fibers)

Answer 21

O: Ribs 9-12 with the serratus anterior and latissimus dorsi

I: Inguinal ligament and iliac crest

Question 22

Origin and Insertion of Internal Oblique (lower anterior fibers)

Answer 22

O: Inguinal ligament and iliac crest (anterosuperior spine)

I: Crest of the pubis, pectineal line, and linea alba

Question 23

Origin and Insertion of Internal Oblique (upper anterior fibers)

Answer 23

O: Iliac crest (intermediate line)

I: Linea alba

Question 24

Origin and Insertion of Internal Oblique (lateral fibres)

Answer 24

O: Iliac crest (intermediate line) and thoracolumbar fascia

I: Ribs 10-12 and linea alba

Question 25

Origin and Insertion of Transversus Abdominis

Answer 25

O: Ribs 6-12, thoracolumbar fascia, iliac crest (internal lip), and inguinal ligament

I: Linea alba, pubic crest, and pecten pubis

Question 26

Innervation of Erector Spinae

Answer 26

T1-T12, L1-L5, and S1-S3