TY - JOUR
T1 - Hebbian learning is jointly controlled by electrotonic and input structure
AU - Tsai, Kenneth Y.
AU - Carnevale, Nicholas T.
AU - Brown, Thomas H.
N1 - Funding Information:
Our work is supported by ONR and ARPA. We thank Z F Mainen and M P O'Boyle for assistance in the preliminary work and B J Claiborne for fumishing the morphometric data.
PY - 1994
Y1 - 1994
N2 - Previous studies have examined how synaptic weights in simple processing elements self-organize under a Hebbian learning rule. Here we treat the problem of a neuron with realistic electrotonic structure, discuss the relevance of our findings to synaptic modifications in hippocampal pyramidal cells, and illustrate them with simulations of an anatomically accurate hippocampal neuron model. We show that the synaptic weight vector M converges toward the principal eigenvector of the matrix [〈xj(xk*nu;tilde;kj)〉], where xj and xk represent presynaptic activity, νtilde;kj(t) is the membrane potential at location j recorded t seconds after a unit impulse of charge is injected at location k, and * is the convolution operator. Thus the synaptic strengths are regulated by the spatiotemporal pattern of presynaptic activity filtered by the electrotonic structure of the neuron.
AB - Previous studies have examined how synaptic weights in simple processing elements self-organize under a Hebbian learning rule. Here we treat the problem of a neuron with realistic electrotonic structure, discuss the relevance of our findings to synaptic modifications in hippocampal pyramidal cells, and illustrate them with simulations of an anatomically accurate hippocampal neuron model. We show that the synaptic weight vector M converges toward the principal eigenvector of the matrix [〈xj(xk*nu;tilde;kj)〉], where xj and xk represent presynaptic activity, νtilde;kj(t) is the membrane potential at location j recorded t seconds after a unit impulse of charge is injected at location k, and * is the convolution operator. Thus the synaptic strengths are regulated by the spatiotemporal pattern of presynaptic activity filtered by the electrotonic structure of the neuron.
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U2 - 10.1088/0954-898X_5_1_001
DO - 10.1088/0954-898X_5_1_001
M3 - Article
AN - SCOPUS:0346441263
SN - 0954-898X
VL - 5
SP - 1
EP - 19
JO - Network: Computation in Neural Systems
JF - Network: Computation in Neural Systems
IS - 1
ER -