Fig. 2From: Antinociceptive tolerance to NSAIDs in the anterior cingulate cortex is mediated via endogenous opioid mechanismMicroinjections of NSAIDs into the ACC for 4 consecutive days result in a progressive decrease in TF (a) and HP (b) latencies as compared to vehicle saline control. *- P < 0.05, **- P < 0.01Back to article page