Dissection of thoracic and lumbosacral regions of back from a posterior approach
Components of erector spinae muscle separated, general view
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Image #213-5
Dissection of thoracic and lumbosacral regions of back from a posterior approach
Components of erector spinae muscle separated, general view
The heavy aponeurosis of origin of the left erector spinae has been partially removed near the midline. This portion of the aponeurosis, form which the longissimus thoracic part arises, also serves to give attachment to portions of the underlying multifidus muscle (8). The iliocostalis (2, 6), longissimus (4) and spinalis (5) muscles have been separated from each other.