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lüll Associative memory storage and retrieval: involvement of theta oscillations in hippocampal information processing Stella F; Treves ANeural Plast 2011[]; 2011 (ä): 683961Theta oscillations are thought to play a critical role in neuronal information processing, especially in the hippocampal region, where their presence is particularly salient. A detailed description of theta dynamics in this region has revealed not only a consortium of layer-specific theta dipoles, but also within-layer differences in the expression of theta. This complex and articulated arrangement of current flows is reflected in the way neuronal firing is modulated in time. Several models have proposed that these different theta modulators flexibly coordinate hippocampal regions, to support associative memory formation and retrieval. Here, we summarily review different approaches related to this issue and we describe a mechanism, based on experimental and simulation results, for memory retrieval in CA3 involving theta modulation.|Acetylcholine/physiology[MESH]|Action Potentials/physiology[MESH]|Animals[MESH]|Association Learning/*physiology[MESH]|CA1 Region, Hippocampal/*physiology[MESH]|CA3 Region, Hippocampal/*physiology[MESH]|Computer Simulation[MESH]|Cues[MESH]|Exploratory Behavior/physiology[MESH]|Humans[MESH]|Mammals/physiology[MESH]|Memory/*physiology[MESH]|Mental Recall/*physiology[MESH]|Models, Neurological[MESH]|Models, Psychological[MESH]|Neurons/physiology[MESH]|Rats[MESH]|Theta Rhythm/*physiology[MESH] |