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KF5JRV > TECH 24.05.16 13:43l 30 Lines 1751 Bytes #999 (0) @ WW
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Subj: Hebb's Law
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Donald Hebb Formulates the "Hebb Synapse" in Neuropsychological Theory 1949
In 1949 Canadian psychologist Donald O. Hebb, then professor at McGill
University, issued The Organization of Behavior. A Neuropsychological Theory.
This work contained the first explicit statement of the physiological learning
rule for synaptic modification that became known as the "Hebb synapse." His
theory became known as Hebbian theory, Hebb's rule, Hebb's postulate, and cell
assembly theory. Models which follow this theory are said to exhibit "Hebbian
learning." As Hebb wrote in the book: "When an axon of cell A is near enough
to excite cell B and repeatedly or persistently takes part in firing it, some
growth process or metabolic change takes place in one or both cells such that
A's efficiency, as one of the cells firing B, is increased."
"This is often paraphrased as 'Neurons that fire together wire together.' It
is commonly referred to as Hebb's Law.
"The combination of neurons which could be grouped together as one processing
unit, Hebb referred to as 'cell-assemblies'. And their combination of
connections made up the ever-changing algorithm which dictated the brain's
response to stimuli.
"Not only did Hebb's model for the working of the mind influence how
psychologists understood the processing of stimuli within the mind but also it
opened up the way for the creation of computational machines that mimicked the
biological processes of a living nervous system. And while the dominant form
of synaptic transmission in the nervous system was later found to be chemical,
modern artificial neural networks are still based on the transmission of
signals via electrical impulses that Hebbian theory was first designed
around".
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