Stimulation

The act of stimulating, or the state of being stimulated.

The irritating action of various agents (stimuli) on muscles, nerves, or a sensory end organ, by which activity is evoked; especially, the nervous impulse produced by various agents on nerves, or a sensory end organ, by which the part connected with the nerve is thrown into a state of activity; irritation.

any stimulating information or event; acts to arouse action

(physiology) the effect of a stimulus (on nerves or organs etc.)