Memristive synapses connect brain and silicon spiking neurons

Alexantrou Serb, Andrea Corna, Richard George, Ali Khiat, Federico Rocchi, Marco Reato, Marta Maschietto, Christian Mayr, Giacomo Indiveri, Stefano Vassanelli, Themistoklis Prodromakis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Brain function relies on circuits of spiking neurons with synapses playing the key role of merging transmission with memory storage and processing. Electronics has made important advances to emulate neurons and synapses and brain-computer interfacing concepts that interlink brain and brain-inspired devices are beginning to materialise. We report on memristive links between brain and silicon spiking neurons that emulate transmission and plasticity properties of real synapses. A memristor paired with a metal-thin film titanium oxide microelectrode connects a silicon neuron to a neuron of the rat hippocampus. Memristive plasticity accounts for modulation of connection strength, while transmission is mediated by weighted stimuli through the thin film oxide leading to responses that resemble excitatory postsynaptic potentials. The reverse brain-to-silicon link is established through a microelectrode-memristor pair. On these bases, we demonstrate a three-neuron brain-silicon network where memristive synapses undergo long-term potentiation or depression driven by neuronal firing rates.

Original languageEnglish
Article number2590
JournalScientific Reports
Volume10
Issue number1
Early online date25 Feb 2020
DOIs
Publication statusE-pub ahead of print - 25 Feb 2020

Fingerprint

Dive into the research topics of 'Memristive synapses connect brain and silicon spiking neurons'. Together they form a unique fingerprint.

Cite this