Lumbar Spinal Stenosis: T2-weighted MRI of the Lumbar Spine; (Left) Mid-sagittal view; (Right Top) Axial scan at the mid-L3 level; (Right Bottom) Axial scan at the L3-L4 disk level.Note the central ...

The two most commonly affected lumbar facet joints are L4–L5 and L5–S1, so the nerves innervating these joints — the L3 and L4 medial branches and the L5 dorsal ramus — are most frequently ...

Lumbar Spinal Stenosis: T2-weighted MRI of the Lumbar Spine. (Left) Mid-sagittal view; ... Axial scan at the L3 level; (Right Bottom) Axial scan at the L3-L4 disk level. Note the severe central canal ...