Back muscle OINAs
| Front | Breakdown of erector spinae |
| Back | Iliocostalis (Lumborum, Thoracis, Cervicis)Longissimus (Thoracis, Cervicis, capitis)Spinalis (Thoracis, Cervicis, capitis) |
| Front | Rhomboids |
| Back | - (bilaterally): slight thoracic extension |
| Front | iliocostalis (Thoracis) |
| Back | O: Angles ribs 7-12 (medial to lumborum)I: Angle of ribs 1-6; TP C7N: PPRA: (Bi) extends vertebral column and head(uni) laterally flex |