RELATION OF OLFACTORY-BULB AND CORTEX .1. SPATIAL VARIATION OF BULBOCORTICAL INTERDEPENDENCE
RELATION OF OLFACTORY-BULB AND CORTEX .1. SPATIAL VARIATION OF BULBOCORTICAL INTERDEPENDENCE
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DOI：
10.1016/0006-8993(87)90713-x
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发表时间：
1987-04-21
期刊：
影响因子：
2.9
通讯作者：
BRESSLER, SL
中科院分区：
文献类型：
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作者：
BRESSLER, SL
我们同时记录了10只处于清醒状态的最小约束兔嗅球和皮质的多个电极处的细胞外电活动痕迹。在呼吸慢波的吸气期，两个结构同时出现35-85 cps的节律性爆发。球皮质相关性在爆发期间显著高于爆发间段。预期有四种情况可以表明球和皮层记录部位的相互依赖性：(1)球和皮层有共同的爆发频率；(2)球皮质爆发相关性高；(3)低球皮质爆发相弥散；(4)脑球和皮层爆发振幅的相关性。找到了满足所有4个条件的成对站点。在所有检查的位点对中，平均球皮质相关性与相色散呈负相关。在相关和相位色散的显著变化被发现在记录位置的球茎和皮层。因此，嗅球内的部位与皮质部位的关系存在显著差异，同样，皮质部位与球内部位的关系也存在显著差异。结果表明，嗅球与皮层的相互依赖关系在空间上是不均匀的。
Traces of extracellular electrical activity were simultaneously recorded from multiple electrode sites of the olfactory bulb and cortex of 10 alert, minimally restrained rabbits. Rhythmic bursts of 35-85 cps activity appeared concurrently in both structures on the inspiratory phase of a respiratory slow wave. Bulbocortical correlation was significantly higher during bursts than during interburst segments. Four conditions were expected to indicate interdependence of a bulbar and a cortical recording site: (1) a common bulbar and cortical burst frequency; (2) high bulbocortical burst correlation; (3) low bulbocortical burst phase dispersion; and (4) correlation between bulbar and cortical burst amplitudes. Pairs of sites were found which satisfied all 4 conditions. Mean bulbocortical correlation was inversely related to phase dispersion over all the site pairs examined. Significant variation in both correlation and phase dispersion was found with location of the recording sites in the bulb and in the cortex. Sites in the olfactory bulb thus differed significantly in their relation with cortical sites, and likewise, cortical sites differed significantly in their relation with bulbar sites. It is concluded that interdependence between the olfactory bulb and cortex can be detected in the relation of their field potentials and that the interdependence is spatially non-uniform.