Quadratus lumborum muscle

Iliocostalis lumborum m., trigger points

Jaw muscle, artwork

Anterior view of the hip and lower back region illustrating the quadratus lumborum muscle and its bony attachments.

Lateral view of the hip and lower back region illustrating the quadratus lumborum muscle and its bony attachments.

Transverse section of back muscles at level of thoracic spine; erector spinae are shown in 3 columns and transversospinalis muscle is shown in 3 layers.

Anterior view of lumbar plexus and vertebral attachment of diaphragm. The psoas muscle on the right side has been removed exposing the femoral nerve and lumbrosacral trunk.

Muscles of the posterior abdominal wall.

Transverse or horizontal (axial) MRI of the abdomen at the level of the lower L3. Image at bottom illustrates level of scan (line F).

Transverse section of the posterior abdominal wall and kidney.

Human musculature, artwork

Human musculature, artwork

Horse iliocostalis lumborum muscle, illustration