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.
Visual hallucinations. Schizophrenics can also have visual hallucinations, which are the second most common type with this disorder. Visual hallucinations involve seeing things which arenât really there. They may involve images which are very clear, as well as vague or distorted.