Anatomic basis for selective nervi-spinales infiltration in the treatment of articular back pain

The purpose of this paper is to describe the radiologic anatomy for selecti ve medial branch block for low back pain resulting from facet joints. A gro ove between the mammillary process and the accessory process (M-A groove) w as chosen as the target point for this nerve block. The position of hi-A gr oove was constant on X-rays at each level of the lumbar spine. Confirming t his position under the fluoroscope, the medial branch nerves can be blocked selectively. This method clarifies the features of low back pain related t o the medial branch.