ANATOMY

Detailed explanation-1: -The two main muscle groups that affect the spine are extensors and flexors. The extensor muscles enable us to stand up and lift objects. The extensors are attached to the back of the spine. The flexor muscles are in the front and include the abdominal muscles.

Detailed explanation-2: -It can be further subdivided into three muscles: the longissimus thoracis, longissimus cervicis, and longissimus capitis muscles. Iliocostalis is the most lateral of the muscles in the erector spinae group.

Detailed explanation-3: -Thoracic Erector Spinae group ie Iliocostalis; Longissimus; Spinalis– the main extensor (backward bending) muscle of the thoracic spine, located on either side of the vertebral column. The erector spinae is most massive in the lumbar and thoracic regions.

Detailed explanation-4: -Spinalis muscles. Longissimus muscles. Iliocostalis muscles.