intrinsic Back Muscles

Serratus Posterior Superior – Functional Anatomy

Serratus posterior superior attaches to C6-T3 and inserts on ribs 2-5, trapping the 2nd and 3rd thoracic vertebrae. There is a thin sheet of connective tissue that continues from the short bellies of the muscle on the rib to the supraspinous ligament over the spinous process. The width of this aponeurosis varies significantly among dissections …

Serratus Posterior Superior – Functional Anatomy Read More »

Serratus Posterior Inferior – Functional Anatomy

Serratus Posterior Inferior Serratus posterior inferior originates on T11-L2 and inserts on ribs 9-12, trapping the 9th and 10th thoracic vertebrae. There is a thin sheet of connective tissue that continues from the short bellies of the muscle on the rib to the supraspinous ligament over the spinous process. The width of this aponeurosis varies …

Serratus Posterior Inferior – Functional Anatomy Read More »

Quadratus Lumborum – Functional Anatomy

Quadratus lumborum, means “the square muscle in the low back.” It connects the lumbar vertebrae to the ribs and iliac crest trapping T12 and the sacrum its attachments. Quadratus Lumborum has 3 sections; iliolumbar, lumbocostal and lateral. They perform different functions, have different trigger point patterns and are best addressed as different muscles. Quadratus lumborum varies …

Quadratus Lumborum – Functional Anatomy Read More »

Rotatores and Multifidi – Functional Anatomy

Multifidi and Rotatores Multifidi and rotatores form a thick band of muscles that fill the lamina groove. They connect the transverse process of a vertebra to the vertebrae above it. The shortest strand is the deepest. As the strands lengthen to span more vertebrae, they become more superficial. Multifidi and rotatores form a thick band of muscle that …

Rotatores and Multifidi – Functional Anatomy Read More »