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Thoracolumbar junction T10-L2

Thoracic and lumbar fractures: Left sided thoracolumbar junction approach (T10-L2)|alt

In the lumbar region, the psoas muscle is thick.

The psoas muscle is then mobilized to facilitate posterior retraction. The dissection begins on the anterior border of the psoas muscle over a disc space. The disc space above and below the involved vertebra should be exposed initially.