Thoracolumbaal

Thoracolumbaal is a term used in anatomy to describe the region of the spine and its associated soft tissues where the thoracic and lumbar segments meet. In English-language anatomy the corresponding term is thoracolumbar; the Dutch spelling thoracolumbaal may be encountered in Dutch medical literature.

Anatomical boundaries and components

The thoracolumbaal region typically encompasses the lower thoracic and upper lumbar vertebrae, often cited as roughly from the twelfth thoracic vertebra (T12) to the fifth lumbar vertebra (L5). The region includes the thoracic and lumbar vertebrae, their intervertebral discs, and the muscle groups that attach across this area, notably the erector spinae, latissimus dorsi, and oblique abdominal muscles. The thoracolumbar fascia, a key component, forms a connective tissue envelope that helps organize and transmit forces between the upper and lower body and provides attachment sites for multiple muscles.

Thoracolumbar fascia and functional significance

The thoracolumbar fascia consists of multiple layers—anterior, middle, and posterior—that envelop the back muscles and extend toward the iliac crest and ribs. It plays a role in trunk stability, load transfer, and coordinated movement between the thoracic and lumbar regions. Its architecture supports bending, rotation, and lifting movements and contributes to the mechanical integration of the spine and pelvis.

Clinical relevance

In medical practice, the thoracolumbaal region is relevant for discussions of back pain, injuries, and surgical approaches to the lumbar and lower thoracic spine. Disorders affecting this region can involve spinal instability, fascia-related pain, or muscular dysfunction.

See also

Thoracolumbar spine, Thoracolumbar fascia, Latissimus dorsi.