Here is the list of muscles potentially responsible for this pain, a line can be selected for more detail on a particular muscle: Longissimus muscle of the thorax Iliocostal muscle of the lower back Multifidus
Here is the list of muscles potentially responsible for these pains, a link can be selected for more details on a particular muscle: Longissimus muscle of the thorax Iliocostal muscle of the loins Multifidus muscle