selkänikamien

Selkänikamien, a Finnish term, refers to the lumbar vertebrae. These are the five vertebrae located in the lower back, between the thoracic vertebrae and the sacrum. They are the largest vertebrae in the spine, designed to bear the majority of the body's weight and withstand significant forces. Each lumbar vertebra consists of a vertebral body, a vertebral arch, and several processes. The vertebral body is the large, weight-bearing part. The vertebral arch encloses the spinal canal, protecting the spinal cord. The processes are bony projections that serve as attachment points for muscles and ligaments, facilitating movement and stability of the spine.

The lumbar vertebrae play a crucial role in posture, balance, and movement. They allow for flexion, extension, and lateral bending of the torso, as well as some degree of rotation. Due to their weight-bearing function, the lumbar spine is a common site for pain and injury, including conditions like herniated discs, spinal stenosis, and degenerative disc disease. The structure and alignment of the selkänikamien are vital for maintaining overall spinal health and preventing discomfort.