Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
A line diagram of horizontal section of abdomen through thoracolumbar junction showing (a) L1 vertebra with musculature and abdominal wall layers. Thick line denotes the proposed entry from the posterior to anterior underneath quadrates lumborum and psoas major muscle to reach lateral surface to the vertebral body (b) exposure of the lateral surface of body, pedicle and anterior transverse process once psoas major and quadratus lumborum retracted by spatula
