neural crest

an embryonic structure consisting of a ridgelike area of ectodermal tissue on either side of the neural tube that develops into the spinal ganglia and various structures within the sympathetic and peripheral nervous systems.

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Psychology term of the day

December 23rd 2024

delta rule

the principle that the change in strength of an association during learning is a function of the difference between the maximal strength possible and the current strength of the association. The delta rule is used in associationistic learning theory (see associative learning).