RT Journal
A1 Hampton T
T1 QUick hit of opioids
JF JAMA
JO JAMA
YR 2012
FD March 7
VO 307
IS 9
SP 904
OP 904
DO 10.1001/jama.2012.223
UL http://dx.doi.org/10.1001/jama.2012.223
AB 
By stimulating pain fibers in rats that received anesthesia (but whose spinal cord signals were preserved), investigators at the Medical University of Vienna in Austria found that high doses of opioids over the course of an hour deleted the spinal cord's memory trace of the pain signal.