tokens: From the supposition that there exists a possible connection between certain psychopathological symptoms , and / or syndromes ( e . g . , hallucinations ) and regional cerebral dysfunction , patients suffering from auditory and tactile hallucinations were investigated , in a symptom - oriented study , using the method of technetium - 99m - Hexamethyl - propylenamine Oxime ( 99m - Tc - HMPAO ) - Single Photon Emission Computed Tomography ( SPECT ) and compared with normal controls .