L5-S1 is one of the two most common sites for back surgery. The other is the area just above, called L4-L5. In the low back, the L5-S1 junction is often the site of a problem known as ...

The target of the needle for L1–L4 medial branch is the groove formed by the junction of the transverse process and superior articular process. For the L5 dorsal ... into the S1, S2 and S3 ...

Results: The disc signal intensity was progressively reduced the more caudal the disc space. It was most common at the L5/S1 level, and, of the abnormal group, 36% (n = 11) showed the most ...