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

Components of erector spinae muscle in lower thoracic and lumbar regions

For permissions information regarding the use of these images, please contact Drew Bourn at dbourn@stanford.edu

Image #213-7
Bassett ImageDiagram Image
Legend Image
Dissection of thoracic and lumbosacral regions of back from a posterior approach
Components of erector spinae muscle in lower thoracic and lumbar regions
Details of the lower part of the specimen shown in view 213-5 are illustrated in this photograph. The lumbar part of the mulitfidus muscle (14) is large and has an extensive origin from the deep surface of the aponeurosis of the erector spinae muscle.
1 . Rib X
2 . External intercostal muscle
3 . Dorsal branch thoracic nerve XI (muscular and cutaneous branches)
4 . Iliocostalis lumborum muscle
5 . Rib XII
6 . Internal oblique muscle (cut across close to origin)
7 . Superior cluneal nerves
8 . Iliac crest
9 . Spinalis thoracis muscle
10 . Longissimus thoracis muscle
11 . Latissimus dorsi muscle
12 . Spinous process vertebra L. II
13 . External oblique muscle
14 . Multifidus muscle