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. 2011 May 26;2011:361054. doi: 10.1093/ecam/nep133

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Copyright © 2011 Yi-Jing Li et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Effect of single EA treatment on sleep latency (a), time spent in NREM (c), REM sleep (b) and total sleep time (d) during 6-h recording after morphine withdrawal. Empty columns show the data during acute morphine withdrawal before various treatments, and filled columns after the treatment (single session of 2 Hz, 100 Hz or without EA in control group). *P < .05 compared with the data before treatment; ^# P < .05, ^### P < .001 compared with data after treatment in control group. ^! P < .05 compared with the data after treatment in 2 Hz group. n = 5.