Spinal muscles

Question 1

Erector spinae group

Answer 1

Spinalis
Longissimus
Iliocostalis

Extension and lateral bending

Question 2

Spinalis

Answer 2

Most medial

nuchal ligament and spinous processes of cervical and thoracic vertebrae

Spinous process above

Bilaterally : extend neck and trunk
Unilaterally: rotate head and laterallyy bend neck and trunk

spinal nerves it attaches

Question 3

Longissimus

Answer 3

Transverse processes of all vertebrae

Transverse process above

Bilaterally : extend neck and trunk
Unilaterally: rotate head and laterallyy bend neck and trunk

Question 4

Iliocostalis

Answer 4

Iliac crest , lower ribs

Angles of ribs, upper ribs , transverse process of cervical vertebrae

Bilaterally : extend neck and trunk
Unilaterally: rotate head and laterallyy bend neck and trunk

Question 5

Transversospinalis group

Answer 5

Semispinalis
Multifidus
Rotatores

Extension, rotation to the opposite side

Question 6

Quadratus lumborum

Answer 6

Iliac crest

12th rib, transverse process of all five lumbar vertebrae

Trunk lateral bending

T12 and L1-L5