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.
Auditory hallucinations are among the most common. You might hear someone speaking to you or telling you to do certain things. The voice may be angry, neutral, or warm. Other examples of this type of hallucination include hearing sounds, like someone walking in the attic, or repeated clicking or tapping noises.ental illnesses are among the most common causes of hallucinations. Schizophrenia, dementia, and delirium are a few examples. Substance abuse is another fairly common cause. Some people see or hear things that arenât there after drinking too much alcohol or taking drugs like cocaine or PCP.