what is the origin of the serratus posterior
Both muscles attach to various ribs and parts of the spine. The serratus posterior superior originates on the supraspinal ligament, the ligamentum nuchae, the spinous processes of the upper two to three thoracic vertebrae (T01âT03), as well as the seventh cervical vertebra. It inserts on the upper borders of ribs 2â5, and is innervated by intercostal nerves 2â5.