- Poster presentation
- Open Access
Optimal pair of hippocampal CA1 phase response curve and spike-timing-dependent plasticity for hetero-associative memory
BMC Neuroscience volume 14, Article number: P9 (2013)
Recently reported experimental findings suggest that the hippocampal CA1 network stores spatio-temporal spike patterns and retrieves temporally reversed  and spread-out  patterns. In this paper, we explore the idea that the properties of the neural interactions and the synaptic plasticity rule in the CA1 network enable it to function as a hetero-associative memory recalling such reversed and spread-out spike patterns. In line with Lengyel's speculation , we derive optimally designed spike-timing-dependent plasticity (STDP) rules that are matched to neural interactions formalized in terms of phase response curves (PRCs) for performing the hetero-associative memory function (see Figure 1). First, we formulate a hetero-associative memory network recalling not only the normal spike patterns, but also the reversed and doubly spread-out patterns as a phase oscillator model consisting of an STDP and a PRC. Next, we analytically derive the mutual information between a stored phase pattern and a network output for evaluating memory retrieval performance. By maximizing an object function given by the mutual information, we search for STDP window functions that are optimal for retrieval of normal and doubly spread-out patterns under the constraint that the PRCs are those of CA1 pyramidal neurons recorded in vitro .
The typical STDPs observed in CA1 region are classified into two types : symmetric and asymmetric plasticity rules. We show both of these rules are included in the theoretically derived set of optimal STDPs. The theoretically derived STDPs qualitatively coincide with the first two Fourier series approximations for those reported in CA1 neurons. Furthermore, we demonstrate that the system, which can retrieve normal and doubly spread-out patterns, can also retrieve reversed patterns with the same quality.
Foster DJ, Wilson MA: Reverse replay of behavioural sequences in hipppocampal place cells during the awake state. Nature. 2006, 440: 680-683. 10.1038/nature04587.
Louie K, Wilson MA: Temporally structured replay of awake hippocampal ensemble activity during rapid eye movement sleep. Neuron. 2001, 29: 145-156. 10.1016/S0896-6273(01)00186-6.
Lengyel M, Kwag J, Paulsen O, Dayan P: Matching storage and recall: Hippocampal spike timing-dependent plasticity and phase response curves. Nature Neuroscience. 2005, 8: 1677-1683. 10.1038/nn1561.
Ota K, Omori T, Watanabe S, Miyakawa H, Okada M, Aonishi T: Measurement of infinitesimal phase response curves from noisy real neurons. Physical Review E. 2011, 84: 041902-
Tsukada M, Aihara T, Kobayashi Y, Shimazaki H: Spatial analysis of spike-timing-dependent LTP and LTD in the CA1 area of hippocampal slices using optical imaging. Hippocampus. 2005, 15: 104-109. 10.1002/hipo.20035.
About this article
Cite this article
Miyata, R., Ota, K. & Aonishi, T. Optimal pair of hippocampal CA1 phase response curve and spike-timing-dependent plasticity for hetero-associative memory. BMC Neurosci 14, P9 (2013). https://0-doi-org.brum.beds.ac.uk/10.1186/1471-2202-14-S1-P9
- Mutual Information
- Retrieval Performance
- Phase Oscillator
- Phase Response Curve
- Spike Pattern