Fig. 1From: Facet joint syndrome: from diagnosis to interventional managementInnervation of facet joints (L3–4, L4–5 levels). Vr: ventral ramus. Dr: Dorsal ramus. m: medial branch. i: intermediate branch. l: lateral branch a: ascending branch. d: descending branch. Posterior (a) and posterolateral (b) view of the lumbar spineBack to article page