title: 2D co-ordinate transformation based on a spike timing-dependent plasticity learning mechanism.
abstract: In order to plan accurate motor actions, the brain needs to build an integrated spatial representation associated with visual stimuli and haptic stimuli. Since visual stimuli are represented in retina-centered co-ordinates and haptic stimuli are represented in body-centered co-ordinates, co-ordinate transformations must occur between the retina-centered co-ordinates and body-centered co-ordinates. A spiking neural network (SNN) model, which is trained with spike-timing-dependent-plasticity (STDP), is proposed to perform a 2D co-ordinate transformation of the polar representation of an arm position to a Cartesian representation, to create a virtual image map of a haptic input. Through the visual pathway, a position signal corresponding to the haptic input is used to train the SNN with STDP synapses such that after learning the SNN can perform the co-ordinate transformation to generate a representation of the haptic input with the same co-ordinates as a visual image. The model can be applied to explain co-ordinate transformation in spiking neuron based systems. The principle can be used in artificial intelligent systems to process complex co-ordinate transformations represented by biological stimuli.
authors.affiliation: School of Computing and Intelligent Systems, University of Ulster, Magee Campus, Derry, BT48 7JL, N.Ireland, UK. q.wu@ulster.ac.uk
authors.forename: QingXiang
authors.initials: Q
authors.lastname: Wu
authors.forename: Thomas Martin
authors.initials: TM
authors.lastname: McGinnity
authors.forename: Liam
authors.initials: L
authors.lastname: Maguire
authors.forename: Ammar
authors.initials: A
authors.lastname: Belatreche
authors.forename: Brendan
authors.initials: B
authors.lastname: Glackin
mesh_terms: D000465:Algorithms; D001185:Artificial Intelligence; D004594:Electrophysiology; D008959:Models, Neurological; D015233:Models, Statistical; D016571:Neural Networks, Computer; D009473:Neuronal Plasticity / Q000502:physiology*