The document describes the structure and function of the spine. It discusses the following key points:
- The spine consists of 33 vertebrae divided into 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 3-4 coccygeal vertebrae connected by intervertebral discs.
- The spine allows for six degrees of motion: flexion, extension, lateral bending, rotation, anterior/posterior shear, and compression/distraction.
- Deep segmental muscles like the multifidus control segmental motion while global muscles like the erector spinae produce motion across segments.
- Common faulty spinal postures include lordosis, kyphosis, scoliosis, sway back