Dissection of thoracic and lumbosacral regions of back from a posterior approach

Left serratus posterior superior in relation to splenius and erector spinae muscles

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Image #212-6

Dissection of thoracic and lumbosacral regions of back from a posterior approach Left serratus posterior superior in relation to splenius and erector spinae muscles The left shoulder girdle has been freed by removal of the trapezius, latissimus dorsi and rhomboid muscles and has been pulled away from the thoracic wall. The serratus anterior muscles (10) remains intact. The rather thick, elastic layer of fascia (11) between this muscle and the rib cage has been partially resected to reveal the serratus posterior superior muscle (5). 1 . Splenius capitis muscle 2 . Levator scapulae muscle 3 . Dorsal scapular nerve 4 . Transverse colli artery 5 . Serratus posterior superior muscle 6 . Rib III 7 . External intercostal muscle 8 . Medial margin of scapula 9 . Rhomboid major muscle (cut off) 10 . Serratus anterior muscle (elevated) 11 . Fascial layer between serratus anterior and thoracic wall 12 . Iliocostalis muscle 13 . Longissimus thoracis muscle 14 . Trapezius muscle 15 . Thoracolumbar fascia 16 . Fascia infraspinata 17 . Latissimus dorsi muscle