Serrati Fascia, Posterior View

Description

Posterior neck and upper thorax are presented with the trapezius reflected or visually deemphasized to bring the serrati fascia (a thin aponeurotic layer) into focus over the serratus posterior superior. Superiorly, the fascia relates to the nuchal region and lower cervical spinous processes, then fans inferolaterally toward the upper ribs, investing the muscle slips that run to ribs 2 through 5 near their angles. Laterally, the scapular region frames the field, with the medial border of the scapula and the rhomboid major and minor lying deep to the superficial back layer and medial to the shoulder cap formed by the deltoid. Serratus posterior superior is often skipped in routine surveys, but its fascial investment matters when you teach the layered anatomy of the posterior thoracic wall and the transition from extrinsic to intrinsic back musculature. This posterior perspective clarifies how the serrati fascia blends medially with the thoracolumbar and cervicothoracic aponeurotic attachments and laterally approaches the rib periosteum, a relationship you need when interpreting posterior thoracic pain syndromes, planning posterior approaches for rib exposure, or distinguishing muscle and fascia planes on MRI. Small structure, real consequences. Use this plate in gross anatomy labs and kinesiology lectures to support dissection guidance on reflecting trapezius, identifying rhomboids, and tracing serratus posterior superior fibers to the upper ribs; it also fits well in atlases or surgical education modules that emphasize posterior thoracic wall planes and aponeuroses. Anatomical accuracy verified by SciePro's Medical Advisory Board.