1 — Sacrum [sacral vertebrae SI-SV]; 2 — Iliac crest; 3 — Costal process [LI-LV]; 4 — Longissimus thoracis; 5 — Iliocostalis thoracis; 6 — Longissimus cervicis; 7 — Iliocostalis cervicis; 8 — Longissimus capitis; 9 — Mastoid process; 10 — Iliocostalis lumborum