Some Facts about your back:
The lower back is composed of 5 lumbar vertebrae. The L5-S1 disk is the most commonly injured spinal disk. A flat back is generally the cause of most back problems. All lower back issues are either from a back that is too flat or too arched. The legs are the governor of the back. Establishing proper curvature of the back starts with alignment of the legs. Poses that are used to strengthen the back and open up the legs are: supine tadasana, supta padangusthasana, parsvakonasana, ardha parsvottanasana, uttanasana, prasarita Spartans, eka bad bhekasana, eka pada salabhasana, rajakapotasana prep and setu bandha.

Neck and Jaw
A lot of us hold unnecessary tension in our necks, usually unconsciously. All exercises and alignment principles which help to open the shoulders will release the muscles of the neck and jaw. Poses to release the neck and jaw and strengthen are: baby cobra, salabhasana with hands behind back, salabhasana with arms out to side, standing forward bend with hands clasped behind the back.