Long&ndas
h;Evans dams were exposed to Pb acetate in t
he drinking water during bot
h gestation and lactation, or lactation only. T
his report presents t
he results of an automated, olfactory, serial reversal task administered to t
he adult offspring. Alt
houg
h overall learning rate was not significantly affected by Pb exposure, analyses of specific p
hases of t
he learning process revealed t
hat all t
hree exposed groups required significantly more trials t
han controls to reac
h criterion from t
he point at w
hic
h perseverative responding to t
he previously correct cue ended. T
hese in-dept
h analyses revealed t
hat t
he reversal learning impairment of t
he Pb-exposed animals was not due to a deficit in in
hibiting responses to t
he previously correct cue, t
he mec
hanism commonly assumed to underlie impaired reversal learning. Instead, t
he analyses revealed t
hat two ot
her independent Pb effects were responsible for t
he prolonged postperseverative learning period: a response bias and an impaired ability to associate cues and/or actions wit
h affective consequences. T
he contribution of t
hese two factors varied as a function of t
he timing and intensity of t
he Pb exposure. It is
hypot
hesized t
hat t
he Pb-induced associative deficit may reflect lasting damage to t
he amygdala and/or nucleus accumbens, w
hic
h comprise a system t
houg
ht to modulate t
he process by w
hic
h environmental cues acquire affective significance.
h=""100"" bgcolor=""#F0F0F0"" valign=""top""> Publisher: | h=""470"" valign=""top""> Elsevier Science |
h=""100"" bgcolor=""#F0F0F0"" valign=""top""> Language of Publication: | h=""470"" valign=""top""> English |
h=""100"" bgcolor=""#F0F0F0"" valign=""top""> Item Identifier: | h=""470"" valign=""top""> S0892-0362(99)00057-4 |
h=""100"" bgcolor=""#F0F0F0"" valign=""top""> Publication Type: | h=""470"" valign=""top""> Article |
h=""100"" bgcolor=""#F0F0F0"" valign=""top""> ISSN: | h=""470"" valign=""top""> 0892-0362 |
h=""100"" bgcolor=""#F0F0F0"" valign=""top""> Cited by: | h=""470"" valign=""top""> - Morgan, Russell E.; Garavan, Hugh; Smith, Elliott G.; Driscoll, Lori L.; Levitsky, David A.; Strupp, Barbara J.,""Early lead exposure produces lasting changes in sustained attention, response initiation, and reactivity to errors""Neurotoxicology and Teratology2001pp. 519-531
h ref=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=08920362&issue=v23i0006&article=519_eleplcriarte"">Bibliographic Pagehref=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=08920362&issue=v23i0006&article=519_eleplcriarte&form=pdf&file=file.pdf"">Full TextWidholm, John J.; Clarkson, Geoff B.; Strupp, Barbara J.; Crofton, Kevin M.; Seegal, Richard F.; Schantz, Susan L.,""Spatial Reversal Learning in Aroclor 1254-Exposed Rats: Sex-Specific Deficits in Associative Ability and Inhibitory Control""Toxicology and Applied Pharmacology2001pp. 188-198 href=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=0041008x&issue=v174i0002&article=188_srlia1iaaaic"">Bibliographic Pagehref=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=0041008x&issue=v174i0002&article=188_srlia1iaaaic&form=pdf&file=file.pdf"">Full TextSalinas, Juan A.; Huff, Nicole C.,""Lead and conditioned fear to contextual and discrete cues""Neurotoxicology and Teratology2002pp. 541-550 href=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=08920362&issue=v24i0004&article=541_lacftcadc"">Bibliographic Pagehref=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=08920362&issue=v24i0004&article=541_lacftcadc&form=pdf&file=file.pdf"">Full TextCremin Jr, John D.; Smith, Donald R.,""In vitro vs in vivo Pb effects on brain protein kinase C activity""Environmental Research2002pp. 191-199 href=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=00139351&issue=v90i0003&article=191_ivvivpobpkca"">Bibliographic Pagehref=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=00139351&issue=v90i0003&article=191_ivvivpobpkca&form=pdf&file=file.pdf"">Full TextMorley, Eric J.; Hirsch, Helmut V.B.; Hollocher, Kurt; Lnenicka, Gregory A.,""Effects of Chronic Lead Exposure on the Neuromuscular Junction in Drosophila Larvae""Neurotoxicology2003pp. 35-41 href=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=0161813x&issue=v24i0001&article=35_eocleotnjidl"">Bibliographic Pagehref=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=0161813x&issue=v24i0001&article=35_eocleotnjidl&form=pdf&file=file.pdf"">Full TextMihalick, Sheila M.,""Perinatal exposure to diethylstilbestrol improves olfactory discrimination learning in male and female Swiss-Webster mice""Neurobiology of Learning and Memory2003pp. 55-62 href=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=10747427&issue=v80i0001&article=55_petdioimafsm"">Bibliographic Pagehref=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=10747427&issue=v80i0001&article=55_petdioimafsm&form=pdf&file=file.pdf"">Full TextHirsch, Helmut V.B.; Mercer, John; Sambaziotis, Hera; Huber, Michael; Stark, Diane T.; Torno-Morley, Tara; Hollocher, Kurt; Ghiradella, Helen; Ruden, Douglas M.,""Behavioral Effects of Chronic Exposure to Low Levels of Lead in Drosophila melanogaster""Neurotoxicology2003pp. 435-442 href=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=0161813x&issue=v24i0003&article=435_beocetlolidm"">Bibliographic Pagehref=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=0161813x&issue=v24i0003&article=435_beocetlolidm&form=pdf&file=file.pdf"">Full TextWidholm, John J.; Seo, Byung-Woun; Strupp, Barbara J.; Seegal, Richard F.; Schantz, Susan L.,""Effects of perinatal exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin on spatial and visual reversal learning in rats""Neurotoxicology and Teratology2003pp. 459-471 href=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=08920362&issue=v25i0004&article=459_eopet2avrlir"">Bibliographic Pagehref=""http://202.120.13.78/cgi-bin/sciserv.pl?collection=journals&journal=08920362&issue=v25i0004&article=459_eopet2avrlir&form=pdf&file=file.pdf"">Full Text |
h=""30""> | <hr size=""1""/> Footnotes: Current address: Department of Psychology, Western Illinois University, Macomb, IL.
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