Dopamine depletion in either the dorsomedial or dorsolateral striatum impairs egocentric Cincinnati water maze performance while sparing allocentric Morris water maze learning

被引:40
|
作者
Braun, Amanda A. [1 ]
Amos-Kroohs, Robyn M. [1 ]
Gutierrez, Arnold [1 ]
Lundgren, Kerstin H. [2 ]
Seroogy, Kim B. [2 ]
Skelton, Matthew R. [1 ]
Vorhees, Charles V. [1 ]
Williams, Michael T. [1 ]
机构
[1] Univ Cincinnati, Coll Med, Cincinnati Childrens Res Fdn, Dept Pediat,Div Neurol, Cincinnati, OH 45229 USA
[2] Univ Cincinnati, Coll Med, Dept Neurol, Cincinnati, OH 45267 USA
关键词
Dorsolateral striatum; Dorsomedial striatum; Dopamine; Egocentric; Allocentric; CAUDATE-PUTAMEN LESIONS; BASAL GANGLIA; SPATIAL NAVIGATION; MEMORY-SYSTEMS; NEURAL SYSTEMS; 6-HYDROXYDOPAMINE LESION; ADAPTIVE NAVIGATION; VIRTUAL ENVIRONMENT; PARKINSONS-DISEASE; COGNITIVE DEFICITS;
D O I
10.1016/j.nlm.2014.10.009
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
Both egocentric route-based learning and spatial learning, as assessed by the Cincinnati water maze (CWM) and Morris water maze (MWM), respectively, are impaired following an 80% dopamine (DA) loss in the neostriatum after 6-hydroxydopamine (6-OHDA) administration in rats. The dorsolateral striatum (DLS) and the dorsomedial striatum (DMS) are implicated in different navigational learning types, namely the DLS is implicated in egocentric learning while the DMS is implicated in spatial learning. This experiment tested whether selective DA loss through 6-OHDA lesions in the DMS or DLS would impair one or both types of navigation. Both DLS and DMS DA loss significantly impaired route-based CWM learning, without affecting spatial or cued MWM performance. DLS 6-OHDA lesions produced a 75% DA loss in this region, with no changes in other monoamine levels in the DLS or DMS. DMS 6-OHDA lesions produced a 62% DA loss in this region, without affecting other monoamine levels in the DMS or DLS. The results indicate a role for DA in DLS and DMS regions in route-based egocentric but not spatial learning and memory. Spatial learning deficits may require more pervasive monoamine reductions within each region before deficits are exhibited. This is the first study to implicate DLS and DMS DA in route-based egocentric navigation. (C) 2014 Elsevier Inc. All rights reserved.
引用
收藏
页码:55 / 63
页数:9
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