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Time Makes Space: Emergence of Place Fields in Networks Encoding Temporally Continuous Sensory Experiences by Wang, Zhaoze; Di Tullio, Ronald W.; Rooke, Spencer; Balasubramanian, Vijay is a scholarly article available to read on EtoBox.

What is Time Makes Space: Emergence of Place Fields in Networks Encoding Temporally Continuous Sensory Experiences about?

The vertebrate hippocampus is believed to use recurrent connectivity in area CA3 to support episodic memory recall from partial cues. This brain area also contains place cells, whose location-selective firing fields implement maps supporting spatial memory. Here we show that place cells emerge in networks trained to remember temporally continuous sensory episodes. We model CA3 as a recurrent autoencoder that recalls and reconstructs sensory experiences from noisy and partially occluded observations by agents traversing simulated rooms. The agents move in realistic trajectories modeled from rodents and environments are modeled as high-dimensional sensory experience maps. Training our autoencoder to pattern-complete and reconstruct experiences with a constraint on total activity causes spatially localized firing fields, i.e., place cells, to emerge in the encoding layer. The emergent place fields reproduce key aspects of hippocampal phenomenology: a) remapping (maintenance of and reversion to distinct learned maps in different environments), implemented via repositioning of experience manifolds in the network's hidden layer, b) orthogonality of spatial representations in different ar

Author

Wang, Zhaoze; Di Tullio, Ronald W.; Rooke, Spencer; Balasubramanian, Vijay

Published

2024

Language

EN