CLINICAL MEDICINE

Detailed explanation-1: -The lumbar spine contains 5 vertebrae, labeled L1 to L5, which progressively increase in size going down the lower back. The vertebrae are connected with joints at the back to enable bending and twisting movements of the spine.

Detailed explanation-2: -The lumbar vertebrae help support the weight of the body, and permit movement. Position of human lumbar vertebrae (shown in red). It consists of 5 bones, from the top down, L1, L2, L3, L4 and L5.

Detailed explanation-3: -The lumbar spine has 5 intervertebral segments, termed lumbar segment 1 through 5 (e.g. L1, L2, L3, L4, and L5). Each lumbar spine segment is comprised of: Two vertebrae, such as L4-L5, stacked vertically with an intervertebral disc between them.

Detailed explanation-4: -The spine has three normal curves: cervical, thoracic and lumbar. There are seven cervical vertebrae in the neck, 12 thoracic vertebrae in the torso and five lumbar vertebrae in the lower back.

Detailed explanation-5: -The C5-C6 spinal motion segment includes the following structures: C5 and C6 vertebrae. These vertebrae are each composed of a vertebral body, a vertebral arch, and 2 transverse processes. Together they form paired, synovial facet joints with gliding movements.