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.
Parkinsonâs disease, depression, psychosis, and epilepsy medications may trigger hallucination symptoms. Other conditions that can cause hallucinations include: 1  terminal illnesses, such as AIDS, brain cancer, or kidney and liver failure. 2  high fevers, especially in children and the elderly.3  migraines. 4  social isolation, particularly in older adults. 5  seizures. 6  deafness, blindness, or vision problems.ther conditions that can cause hallucinations include: 1  terminal illnesses, such as AIDS, brain cancer, or kidney and liver failure. 2  high fevers, especially in children and the elderly. 3  migraines. 4  social isolation, particularly in older adults. 5  seizures.