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).
Auditory Hallucinations. Theses auditory, or aural, hallucinations are the most common type of schizophrenia hallucination. They are a disruption of the normal hearing process, involving hearing annoyances such as clicks, hums, or screeches, and can be as complex as hearing complete voices.
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.