- May 6, 2026The rhomboid major is the primary scapular retractor, drawing the scapula toward the spine. Its action rotates the glenoid downward…
- May 6, 2026The rhomboid minor is smaller and superior to rhomboid major, attaching at the root of the scapular spine. Together with…
- May 6, 2026The serratus anterior is the most important scapular stabiliser, holding the medial border of the scapula flat against the thoracic…
- May 6, 2026Serratus posterior inferior is a thin respiratory muscle at the thoracolumbar junction. It depresses the lower ribs during forced expiration,…
- May 6, 2026Transversus thoracis lines the deep internal surface of the anterior thorax. It is the internal thoracic wall homologue of the…
- May 6, 2026Spinalis thoracis is the medial column of the thoracic erector spinae, connecting lower thoracic and upper lumbar spinous processes to…
- May 6, 2026The latissimus dorsi is the broadest muscle, covering most of the posterior thorax. Its thoracodorsal nerve and artery pedicle make…
- May 6, 2026The pectoralis major is the dominant anterior chest muscle with a unique twisted insertion that reverses the cranio-caudal arrangement of…
- May 6, 2026Semispinalis thoracis spans the greatest number of vertebral levels of all the semispinalis components, bridging from the mid-thoracic transverse processes…
- May 6, 2026The subclavius is a small muscle sandwiched between the clavicle and first rib. Its primary function is clavicular stabilisation and…