"13563139-n"^^ . . "113563139"^^ . "112798571"@en-us . . "summation"^^ . . . "0"^^ . . "summation"@en-us . . . "0"^^ . . . . "(physiology) the process whereby multiple stimuli can produce a response (in a muscle or nerve or other part) that one stimulus alone does not produce"@en-us . .