Stochastic resonance means that there is a conditional probability of amplification of activation.

The reticular formation is stimulated by motor activation, by memories of motor activation, by sensory activation, and by memories of sensory activation, and the stimulation may be asymmetrical and non-linear.

Noise activates the reticular formation, the descending nerves of which bring motor responses to threshold, as seen in the acoustic startle response, and in operatives whose work on a property consigns neighbouring properties to loud radio waves.

Noise improves auditory perception by the activation of stapedius muscles and tensor tympani muscles through the nerves of the descending reticular formation.

Noise improves visual perception by the activation of ocular muscles through the nerves of the descending reticular formation.

Noise improves tactile perception by the activation of arrectores pilorum muscles through the nerves of the descending reticular formation.

Noise improves proprioception by the activation of muscle spindles through the nerves of the descending reticular formation.