Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Evaluation of a Postoperative Pain‐Like State on Motivated Behavior in Rats: Effects of Plantar Incision on Progressive‐Ratio Food‐Maintained Responding

Evaluation of a Postoperative Pain‐Like State on Motivated Behavior in Rats: Effects of Plantar... ABSTRACT Preclinical Research There has been recent interest in characterizing the effects of pain‐like states on motivated behaviors in order to quantify how pain modulates goal‐directed behavior and the persistence of that behavior. The current set of experiments assessed the effects of an incisional postoperative pain manipulation on food‐maintained responding under a progressive‐ratio (PR) operant schedule. Independent variables included injury state (plantar incision or anesthesia control) and reinforcer type (grain pellet or sugar pellet); dependent variables were tactile sensory thresholds and response breakpoint. Once responding stabilized on the PR schedule, separate groups of rats received a single ventral hind paw incision or anesthesia (control condition). Incision significantly reduced breakpoints in rats responding for grain, but not sugar. In rats responding for sugar, tactile hypersensitivity recovered within 24 hr, indicating a faster recovery of incision‐induced tactile hypersensitivity compared to rats responding for grain, which demonstrated recovery at PD2. The NSAID analgesic, diclofenac (5.6 mg/kg) completely restored incision‐depressed PR operant responding and tactile sensitivity at 3 hr following incision. The PR schedule differentiated between sucrose and grain, suggesting that relative reinforcing efficacy may be an important determinant in detecting pain‐induced changes in motivated behavior. Drug Dev Res 76 : 432–441, 2015. © 2015 Wiley Periodicals, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Drug Development Research Wiley

Evaluation of a Postoperative Pain‐Like State on Motivated Behavior in Rats: Effects of Plantar Incision on Progressive‐Ratio Food‐Maintained Responding

Loading next page...
 
/lp/wiley/evaluation-of-a-postoperative-pain-like-state-on-motivated-behavior-in-xoXrLLaAa6

References (73)

Publisher
Wiley
Copyright
© 2015 Wiley Periodicals, Inc.
ISSN
0272-4391
eISSN
1098-2299
DOI
10.1002/ddr.21284
pmid
26494422
Publisher site
See Article on Publisher Site

Abstract

ABSTRACT Preclinical Research There has been recent interest in characterizing the effects of pain‐like states on motivated behaviors in order to quantify how pain modulates goal‐directed behavior and the persistence of that behavior. The current set of experiments assessed the effects of an incisional postoperative pain manipulation on food‐maintained responding under a progressive‐ratio (PR) operant schedule. Independent variables included injury state (plantar incision or anesthesia control) and reinforcer type (grain pellet or sugar pellet); dependent variables were tactile sensory thresholds and response breakpoint. Once responding stabilized on the PR schedule, separate groups of rats received a single ventral hind paw incision or anesthesia (control condition). Incision significantly reduced breakpoints in rats responding for grain, but not sugar. In rats responding for sugar, tactile hypersensitivity recovered within 24 hr, indicating a faster recovery of incision‐induced tactile hypersensitivity compared to rats responding for grain, which demonstrated recovery at PD2. The NSAID analgesic, diclofenac (5.6 mg/kg) completely restored incision‐depressed PR operant responding and tactile sensitivity at 3 hr following incision. The PR schedule differentiated between sucrose and grain, suggesting that relative reinforcing efficacy may be an important determinant in detecting pain‐induced changes in motivated behavior. Drug Dev Res 76 : 432–441, 2015. © 2015 Wiley Periodicals, Inc.

Journal

Drug Development ResearchWiley

Published: Dec 1, 2015

Keywords: ; ; ; ; ;

There are no references for this article.