Comparison of Mesocorticolimbic Neuronal Responses During Cocaine and Heroin Self-Administration in Freely Moving Rats

This study was supported by National Institute on Drug Abuse Grant DA 2338 to D.J.W. We thank Dr. David Reboussin for help with statistics and Lu Chen for technical assistance.
Correspondence should be addressed to Dr. Jing-Yu Chang, Department of Physiology and Pharmacology, Wake Forest University, School of Medicine, Winston-Salem, NC 27157.

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Article usage: January 1999 to January 2021

	Abstract	Full	Pdf
Jan 1999	1	6	7
Feb 1999	6	7	10
Mar 1999	3	22	14
Dec 1999	4	9	3
Total 1999	14	44	34
Jan 2000	3	12	7
Feb 2000	1	5	2
Mar 2000	1	13	7
Apr 2000	1	6	6
May 2000	5	9	9
Jun 2000	1	22	17
Jul 2000	0	13	7
Aug 2000	0	19	4
Sep 2000	4	9	4
Oct 2000	4	8	3
Nov 2000	1	8	6
Dec 2000	3	14	8
Total 2000	24	138	80
Jan 2001	6	20	17
Feb 2001	2	14	12
Mar 2001	3	23	16
Apr 2001	6	28	14
May 2001	4	14	8
Jun 2001	2	10	9
Jul 2001	1	11	8
Aug 2001	0	9	4
Sep 2001	0	5	3
Oct 2001	2	9	4
Nov 2001	4	10	11
Dec 2001	2	12	10
Total 2001	32	165	116
Jan 2002	1	21	12
Feb 2002	2	18	11
Mar 2002	4	13	9
Apr 2002	3	6	7
May 2002	5	7	14
Jun 2002	1	8	5
Jul 2002	2	20	25
Aug 2002	1	10	11
Sep 2002	1	16	6
Oct 2002	4	14	12
Nov 2002	1	16	10
Dec 2002	1	8	9
Total 2002	26	157	131
Jan 2003	0	3	6
Feb 2003	0	9	1
Mar 2003	1	7	4
Apr 2003	1	4	8
May 2003	1	12	3
Jun 2003	3	9	8
Jul 2003	4	12	8
Aug 2003	9	13	15
Sep 2003	8	15	4
Oct 2003	6	16	12
Nov 2003	13	24	8
Dec 2003	6	23	13
Total 2003	52	147	90
Jan 2004	21	14	9
Feb 2004	11	29	8
Mar 2004	24	40	19
Apr 2004	13	37	16
May 2004	16	37	7
Jun 2004	11	21	4
Jul 2004	14	34	16
Aug 2004	26	35	14
Sep 2004	17	36	5
Oct 2004	6	42	8
Nov 2004	8	40	7
Dec 2004	16	53	23
Total 2004	183	418	136
Jan 2005	15	27	16
Feb 2005	17	35	7
Mar 2005	12	29	19
Apr 2005	9	23	9
May 2005	9	29	14
Jun 2005	18	13	11
Jul 2005	2	10	11
Aug 2005	6	13	3
Sep 2005	6	19	6
Oct 2005	5	17	7
Nov 2005	10	36	10
Dec 2005	11	18	6
Total 2005	120	269	119
Jan 2006	5	26	26
Feb 2006	4	21	7
Mar 2006	5	14	6
Apr 2006	4	19	7
May 2006	7	15	3
Jun 2006	3	10	6
Jul 2006	4	6	1
Aug 2006	0	8	8
Sep 2006	4	16	5
Oct 2006	9	16	9
Nov 2006	10	10	3
Dec 2006	4	20	6
Total 2006	59	181	87
Jan 2007	5	13	7
Feb 2007	3	20	12
Mar 2007	6	20	18
Apr 2007	11	24	14
May 2007	7	14	6
Jun 2007	3	11	7
Jul 2007	1	14	5
Aug 2007	6	11	11
Sep 2007	3	17	10
Oct 2007	9	11	7
Nov 2007	10	15	10
Dec 2007	6	13	7
Total 2007	70	183	114
Jan 2008	5	7	6
Feb 2008	19	18	11
Mar 2008	7	11	5
Apr 2008	5	8	9
May 2008	2	14	16
Jun 2008	5	17	7
Jul 2008	5	10	7
Aug 2008	7	9	6
Sep 2008	10	5	10
Oct 2008	12	10	4
Nov 2008	8	10	8
Dec 2008	1	11	4
Total 2008	86	130	93
Jan 2009	2	9	6
Feb 2009	7	12	6
Mar 2009	8	12	9
Apr 2009	3	14	10
May 2009	2	4	2
Jun 2009	3	5	2
Jul 2009	2	3	2
Aug 2009	6	8	9
Sep 2009	4	15	4
Oct 2009	2	11	7
Nov 2009	8	11	7
Dec 2009	9	6	5
Total 2009	56	110	69
Jan 2010	2	7	6
Feb 2010	5	9	13
Mar 2010	6	7	7
Apr 2010	6	11	5
May 2010	2	9	4
Jun 2010	0	3	4
Jul 2010	1	4	7
Aug 2010	4	4	3
Sep 2010	6	10	11
Oct 2010	6	11	9
Nov 2010	6	13	7
Dec 2010	5	9	6
Total 2010	49	97	82
Jan 2011	3	6	7
Feb 2011	9	4	4
Mar 2011	5	11	15
Apr 2011	9	9	10
May 2011	13	6	13
Jun 2011	5	4	8
Jul 2011	4	7	7
Aug 2011	9	6	8
Sep 2011	7	9	7
Oct 2011	9	5	6
Nov 2011	12	20	10
Dec 2011	6	3	3
Total 2011	91	90	98
Jan 2012	6	10	8
Feb 2012	4	7	8
Mar 2012	7	13	15
Apr 2012	12	17	13
May 2012	27	12	9
Jun 2012	8	6	4
Jul 2012	3	7	16
Aug 2012	51	4	9
Sep 2012	13	7	7
Oct 2012	10	4	8
Nov 2012	30	7	16
Dec 2012	23	2	5
Total 2012	194	96	118
Jan 2013	14	8	13
Feb 2013	19	2	3
Mar 2013	12	8	12
Apr 2013	12	7	14
May 2013	12	1	15
Jun 2013	8	5	9
Jul 2013	4	4	5
Aug 2013	7	5	10
Sep 2013	12	1	4
Oct 2013	18	2	2
Nov 2013	5	4	4
Dec 2013	8	2	1
Total 2013	131	49	92
Jan 2014	4	2	4
Feb 2014	5	4	8
Mar 2014	18	3	3
Apr 2014	16	9	14
May 2014	8	7	8
Jun 2014	3	2	4
Jul 2014	3	9	3
Aug 2014	5	9	8
Sep 2014	14	10	10
Oct 2014	5	4	5
Nov 2014	18	9	10
Dec 2014	11	4	8
Total 2014	110	72	85
Jan 2015	10	7	11
Feb 2015	27	16	10
Mar 2015	13	8	4
Apr 2015	16	7	5
May 2015	23	14	6
Jun 2015	4	14	8
Jul 2015	5	15	10
Aug 2015	8	10	7
Sep 2015	13	3	7
Oct 2015	13	8	12
Nov 2015	5	20	24
Dec 2015	5	2	17
Total 2015	142	124	121
Jan 2016	10	10	27
Feb 2016	13	12	3
Mar 2016	17	7	8
Apr 2016	8	14	5
May 2016	6	5	3
Jun 2016	6	30	8
Jul 2016	2	8	6
Aug 2016	6	3	3
Sep 2016	8	7	5
Oct 2016	2	7	4
Nov 2016	3	18	8
Dec 2016	1	24	1
Total 2016	82	145	81
Jan 2017	1	26	10
Feb 2017	5	25	5
Mar 2017	2	40	8
Apr 2017	2	17	3
May 2017	6	50	4
Jun 2017	4	14	6
Jul 2017	0	9	1
Aug 2017	0	11	1
Sep 2017	0	7	2
Oct 2017	2	35	1
Nov 2017	2	14	5
Dec 2017	2	9	1
Total 2017	26	257	47
Jan 2018	1	16	4
Feb 2018	7	8	2
Mar 2018	2	13	7
Apr 2018	7	13	5
May 2018	3	14	12
Jun 2018	2	21	5
Jul 2018	4	9	5
Aug 2018	0	11	4
Sep 2018	1	35	4
Oct 2018	4	16	6
Nov 2018	0	7	0
Dec 2018	1	8	1
Total 2018	32	171	55
Jan 2019	5	8	3
Feb 2019	3	11	7
Mar 2019	3	12	8
Apr 2019	2	10	2
May 2019	2	9	3
Jun 2019	7	13	7
Jul 2019	0	5	11
Aug 2019	1	16	5
Sep 2019	1	53	9
Oct 2019	3	135	6
Nov 2019	4	13	7
Dec 2019	2	9	8
Total 2019	33	294	76
Jan 2020	7	15	11
Feb 2020	6	21	5
Mar 2020	4	6	2
Apr 2020	5	35	6
May 2020	1	20	6
Jun 2020	3	9	3
Jul 2020	1	9	5
Aug 2020	1	5	1
Sep 2020	2	19	14
Oct 2020	2	26	11
Nov 2020	5	28	6
Dec 2020	4	16	4
Total 2020	41	209	74
Jan 2021	2	17	13
Total 2021	2	17	13
Total	1655	3563	2011