We propose a neuron model whose internal state is integrated on a two dimen
sional phase space composed of time and dendritic space. Here, the postsyna
ptic potential is given as a curved surface on the phase space. Using the p
roposed neuron model, we introduce a continuous-time associative memory mod
el with spike propagation delay and multiple synaptic sites on the dendrite
. We show by numerical simulation that the memory capacity is doubled due t
o the effects of temporal spike coding and active dendrite compared to the
sparse coding associative memory model. (C) 2000 Elsevier Science Ireland L
td. All rights reserved.