Visual hallucination: Another aspect that the brain is equal to behavior is defined as perception when there is no externally generated stimulus (4). Unlike illusions, external objects actually exist and are perceived in hallucinations, but are misunderstood by individuals (4). The main forms of hallucinations are vision, hearing and smell, but since we have recently discussed the real vision and interpretation, this article visually focuses on them only.
Many hypotheses have been proposed to explain the cause of visual hallucinations. Asaad and Shapiro 1 summarize these classifications: psychophysiology (ie interference as a brain structure), psychological chemistry (as interference with neurotransmitters), and psychodynamics (as an emergence of unconscious entrance consciousness ). Given the interplay between the brain's anatomy, the chemistry of the brain, the interference from the previous experience and the psychodynamic meaning, visual hallucinations can be the result of all three processes
Simple illusion (SVH) is also known as non-forming illusion and fundamental illusion. These terms refer to light, color, geometry, and individual objects. They can be further subdivided into illusion of unstructured SVH and optical aberrations of SVH with geometric structure. Hearing hallucination (also known as paraxia) is a sound perception without external stimulation. Hearing hallucination is the most common type of hallucinations. Hearing hallucinations can be divided into two categories. Primary illusion is the perception of sound such as snoring, whistling, and loud voice. In many cases, tinnitus is a fundamental auditory hallucination. However, some people experience specific types of tinnitus, especially pulsatile tinnitus, and in fact some people hear blood spikes through blood vessels near the ears.