1. Characterization of peripheral and central sensitization after dorsal root ganglion intervention in patients with unilateral lumbosacral radicular pain: a prospective pilot study 
V Mehta, S Snidvongs, B Ghai, R Langford, T Wodehouse 
British Journal of Anaesthesia 
Volume 118, Issue 6, Pages (June 2017)
DOI: /bja/aex089
Copyright © 2017 The Author(s) Terms and Conditions

2. Fig 1
Study flow diagram. DRG, dorsal root ganglion; PRF, pulsed radiofrequency; QST, quantitative sensory testing; VAS, visual analog scale.
British Journal of Anaesthesia  , DOI: ( /bja/aex089)
Copyright © 2017 The Author(s) Terms and Conditions

3. Fig 2
The dorsal root ganglion block was performed according to a standard local protocol, with a mixture of bupivacaine 0.25% 1 ml and methylprednisolone (as Depo-Medrone®) 20 mg injected at the site of the dorsal root ganglion. A radiculogram was obtained to confirm appropriate placement.
British Journal of Anaesthesia  , DOI: ( /bja/aex089)
Copyright © 2017 The Author(s) Terms and Conditions

4. Fig 3
Pressure pain thresholds before and after dorsal root ganglion (DRG) block and pulsed radiofrequency (PRF). Measurements were made on the painful and the contralateral side.
British Journal of Anaesthesia  , DOI: ( /bja/aex089)
Copyright © 2017 The Author(s) Terms and Conditions

5. Fig 4
The effects of a noxious stimulus on conditioned pain modulation before and after dorsal root ganglion block.
British Journal of Anaesthesia  , DOI: ( /bja/aex089)
Copyright © 2017 The Author(s) Terms and Conditions

6. Fig 5
The effects of a noxious stimulus on conditioned pain modulation before and after pulsed radiofrequency.
British Journal of Anaesthesia  , DOI: ( /bja/aex089)
Copyright © 2017 The Author(s) Terms and Conditions