Journal ArticleDOI
The Classification of Modifiable Synapses and Their Use In Models For Conditioning
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It is argued that if the conditioning and memory mechanisms of the nervous system store information by means of modifiable synapses, some of these must be of class B or C, and if the models are to be given the property of extinction, classical conditioning requires modifiablesynapses of classes A and B or of class C.Abstract:
Modifiable synapses are analysed theoretically. It is proved that they fall into three classes (called A, B and C), such that any two members of the same class can, with the aid of non-remembering elements that perform simple logical operations, replace one another in any net; but a member of class A cannot replace one of class B or C. A member of class B can replace one of class A or C only if non-logical elements, for example noise generators, are included in the net. Models are designed that use modifiable synapses and show the principal features of classical and operant conditioning. If the models are to be given the property of extinction, classical conditioning requires modifiable synapses of classes A and B or of class C, and operant conditioning of class B or C. It is argued that if the conditioning and memory mechanisms of the nervous system store information by means of modifiable synapses, some of these must be of class B or C.read more
Citations
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Non-holographic associative memory
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Cerebellar Long-Term Depression: Characterization, Signal Transduction, and Functional Roles
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Innate and environmental factors in the development of the kitten's visual cortex.
Colin Blakemore,R C Van Sluyters +1 more
TL;DR: A study of the receptive fields of 771 cells recorded in the visual cortex of twenty‐five kittens reared normally or subjected to various kinds of visual deprivation or environmental manipulation finds that in deprived animals, there are a number of genuinely orientation selective cells.
References
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Journal ArticleDOI
The excitatory synaptic action of climbing fibres on the Purkinje cells of the cerebellum.
TL;DR: In this article, it was shown that a single climbing fibre makes an extraordinarily extensive synaptic contact with the dendrites of a Purkinje cell, and that the response had an all-or-nothing character, which corresponds with the synaptic action that is to be expected from climbing fibres.
Journal ArticleDOI
Central effects of centripetal impulses in axons of spinal ventral roots.
TL;DR: Information concerning this activity is presented at this time because of its possible importance in the economy of the ventral gray matter and, more particularly, because the pattern of discharge of the individual neurons is sufficiently unusual to be of general interest.