Neural Darwinism: The Theory of Neuronal Group Selection

By Gerald M. Edelman | Go to book overview

ABBREVIATIONS AND
MATHEMATICAL SYMBOLS

ABBREVIATIONS
CAM Cell adhesion molecule
CNS Central nervous system
CS Conditioned stimulus
L-CAM Liver cell adhesion molecule
Id Large domain polypeptide of N-CAM
M Modifying substance
N-CAM Neural cell adhesion molecule
Ng-CAM Neuron-glia cell adhesion molecule
NGF Nerve growth factor
PSP Postsynaptic potential
ROC Receptor-operated channel
SAM Substrate adhesion molecule
sd Small domain polypeptide of N-CAM
ssd Small surface domain of N-CAM
US Unconditioned stimulus
VSC Voltage-sensitive channel

MATHEMATICAL SYMBOLS

Chapter 7
εj Presynaptic efficacy; amount of transmitter released by celli for a given depo-
larization
ðij Postsynaptic efficacy; local depolarization produced at postsynaptic process of
cell i for a given amount of transmitter released by cell i
tL Lag time between homosynaptic input and production of M
tM Time constant for persistence of modifying substance
tD Averaged conduction time delay for beterosynaptic effects
tv Time constant for persistence of voltage changes
Kb2 Rate constant for "forward modification" from I to I* in the postsynaptic rule
Kb Rate constant for "back modification" from I* to I state
Kb2 Rate constant for "back modification" from A* to A state
a(V) Voltage-dependent rate constant for I to A transition (rate decreases with depo-
larization)
b(V) Voltage-dependent rate constant for A to I transition (rate increases with depo-
larization)
a*(V) Rate constant for I* to A* transition
b*(V) Rate constant for A* to I* transition

-355-

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