AGED STONE MAZE-IMPAIRED RATS EXHIBIT REDUCED STRIATAL MUSCARINIC RECEPTOR DENSITIES

被引：7

作者：

BRATT, AM ^{[1
]}

KELLY, ME ^{[1
]}

DOMENEY, AM ^{[1
]}

NAYLOR, RJ ^{[1
]}

COSTALL, B ^{[1
]}

机构：

[1] MEMPHIS STATE UNIV,DEPT PSYCHOL,MEMPHIS,TN 38152

来源：

NEUROREPORT | 1994年 / 5卷 / 18期

关键词：

AGED RATS; STONE MAZE; MUSCARINIC RECEPTOR BINDING; H-3] QNB; STRIATUM; FRONTAL CORTEX; HIPPOCAMPUS;

D O I：

10.1097/00001756-199412000-00068

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

MUSCARINIC receptor densities, measured by saturation radioligand binding using the muscarinic antagonist [H-3]QNB, were compared in the striatum, frontal cortex and hippocampus between two populations of young (3 month) and aged (12-20 month) Hooded Lister rats which had previously been tested in a complex maze task. Aged rats were impaired in their performance of a Stone (14-unit T-maze) task and were less spontaneously active than young rats. Muscarinic receptor numbers were significantly decreased in the striatum of aged rats, whilst numbers in the hippocampus and frontal cortex and receptor affinities in all three areas were unaltered. These results indicate that the age-associated depletion of striatal muscarinic receptors may contribute to deficits in cognitive processing and/or motor behaviour which underlie impairments in the performance of complex spatial tasks.

引用

页码：2678 / 2682

页数：5

共 23 条

[1] PARALLEL ORGANIZATION OF FUNCTIONALLY SEGREGATED CIRCUITS LINKING BASAL GANGLIA AND CORTEX [J].