Excited audience members in Australia. Stimulation or sensory excitation is the action of various agents or forms of energy (stimuli) on receptors that generate impulses that travel through nerves to the brain (afferents).
Voices are the most common type of hallucination in schizophrenia. Many people with the disorder hear voices. The voices may talk to the person about his or her behavior, order the person to do things, or warn the person of danger.
In schizophrenia, the hallucination may be an auditory input also derived from demons, and the patient may hear these inputs not audible to the observer. The hallucination in schizophrenia may therefore be an illusionâa false interpretation of a real sensory image formed by demons.