期刊
FRONTIERS IN BEHAVIORAL NEUROSCIENCE
卷 8, 期 -, 页码 -出版社
FRONTIERS RESEARCH FOUNDATION
DOI: 10.3389/fnbeh.2014.00062
关键词
hippocampus; prefrontal cortex; decision making; computational modeling; information coding
资金
- Wellcome Trust
- EPSRC UK [EP/E501214/1, EP/I032622/1]
- MRC [G1002064]
- EPSRC [EP/I032622/1] Funding Source: UKRI
- MRC [G1002064] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I032622/1] Funding Source: researchfish
- Medical Research Council [G1002064] Funding Source: researchfish
We introduce a computational model describing rat behavior and the interactions of neural populations processing spatial and mnemonic information during a maze-based, decision-making task. The model integrates sensory input and implements working memory to inform decisions at a choice point, reproducing rat behavioral data and predicting the occurrence of turn- and memory-dependent activity in neuronal networks subserving task performance. We tested these model predictions using a new software toolbox (Maze Query Language, MQL) to analyse activity of medial prefrontal cortical (mPFC) and dorsal hippocampal (dCA1) neurons recorded from six adult rats during task performance. The firing rates of dCA1 neurons discriminated context (i.e., the direction of the previous turn), whilst a subset of mPFC neurons was selective for current turn direction or context, with some conjunctively encoding both. mPFC turn-selective neurons displayed a ramping of activity on approach to the decision turn and turn-selectivity in mPFC was significantly reduced during error trials. These analyses complement data from neurophysiological recordings in non-human primates indicating that firing rates of cortical neurons correlate with integration of sensory evidence used to inform decision-making.
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