Cervical spine in Bhujangasana

Most often students extend the cervical spine in Bhujagasana by lifting the chin, this is not true extension of cervical spine. To understand this, while sitting, flex your neck so you're looking down. Place your fingers on upper and lower cervical spine. Now backbend your neck from the top of your cervical spine only by lifting your chin a few inches. You will ntocie your lower cervical are in flexion while upper is in extension.

To practice Bhujangasana, ensure you lift using your back muscles (can keep your hands off the floor to bring awareness to your back muscles). To practice even extension, make sure the top of the head is facing the opposite wall instead of jutting the chin forward.