Functional Hallucinations

Functional hallucinations occur when a normal sensory stimulus is required to precipitate a hallucination in that same sensory modality, as when voices are heard only when the doorbell rings.

Functional hallucinations are hallucinations of any modality that are experienced simultaneously with a normal stimulus in that modality.

In Functional hallucination, the hallucination Opens in new window is provoked by a stimulus and occurs in the same sensory modality as the stimulus.

Both the stimulus and the hallucination are perceived simultaneously and are also perceived as being distinct. Thus, a patient may hear a voice only when a tap is turned on and then hears both the sound of running water and the sound of the voice.

    Research data for this literature has been adapted from these following manuals:
  1. Crash Course Psychiatry - E-Book By Katie FM Marwick, Steven Birrell
  2. Core Psychiatry E-Book, Edited by Padraig Wright, Julian Stern, Michael Phelan