(n.) = activation ; firing. Ex: Manoeuvres that have been used, as the the percipient observer well knows, include simplifications and routines to save time, such as the activation of what psychologists call 'threat-reduction mechanisms'. Ex: Stochastic features include variable thresholds for neuronal firing and occasional cell death. ---- * activación por contacto = constrained spreading activation. * activación por neutrones = neutron activation.