Oliver Sacks Hallucinations Quotes & Sayings

Given her deafness, the auditory part of the brain, deprived of its usual input, had started to generate a spontaneous activity of its own, and this took the form of musical hallucinations, mostly musical memories from her earlier life. The brain needed to stay incessantly active, and if it was not getting its usual stimulation ... , it would create its own stimulation in the form of hallucinations. — Oliver Sacks

Professional musicians, in general, possess what most of us would regard as remarkable powers of musical imagery. Many composers, indeed, do not compose initially or entirely at an instrument but in their minds. There is no more extraordinary example of this than Beethoven, who continued to compose (and whose compositions rose to greater and greater heights) years after he had become totally deaf. It is possible that his musical imagery was even intensified by deafness, for with the removal of normal auditory input, the auditory cortex may become hypersensitive, with heightened powers of musical imagery (and sometimes even auditory hallucinations). — Oliver Sacks

About 10 percent of the hearing impaired get musical hallucinations, and about 10 percent of the visually impaired get visual hallucinations. — Oliver Sacks

In general, people are afraid to acknowledge hallucinations because they immediately see them as a sign of something awful happening to the brain, whereas in most cases they're not. — Oliver Sacks

With any hallucinations, if you can do functional brain imagery while they're going on, you will find that the parts of the brain usually involved in seeing or hearing - in perception - have become super active by themselves. And this is an autonomous activity; this does not happen with imagination. — Oliver Sacks

This usually occurs at the moment when my head hits the pillow at night; my eyes close and ... I see imagery. I do not mean pictures; more usually they are patterns or textures, such as repeated shapes, or shadows of shapes, or an item from an image, such as grass from a landscape or wood grain, wavelets or raindrops ... transformed in the most extraordinary ways at a great speed. Shapes are replicated, multiplied, reversed in negative, etc. Color is added, tinted, subtracted. Textures are the most fascinating; grass becomes fur becomes hair follicles becomes waving, dancing lines of light, and a hundred other variations and all the subtle gradients between them that my words are too coarse to describe. — Oliver Sacks

Such epileptic hallucinations or dreams, Penfield showed, are never phantasies: they are always memories, and memories of the most precise and vivid kind, accompanied by the emotions which accompanied the original experience. Their extraordinary and consistent detail, which was evoked each time the cortex was stimulated, and exceeded anything which could be recalled by ordinary memory, suggested to Penfield that the brain retained an almost perfect record of every lifetime's experience, that the total stream of consciousness was preserved in the brain, and, as such, could always be evoked or called forth, whether by the ordinary needs and circumstances of life, or by the extraordinary circumstances of an epileptic or electrical stimulation. — Oliver Sacks

I think hallucinations need to be discussed. There are all sorts of hallucinations, and then many sorts which are okay, like the ones I think which most of us have in bed at night before we fall asleep, when we can see all sorts of patterns or faces and scenes. — Oliver Sacks

Psychotic hallucinations, whether they are visual or vocal, they address you. They accuse you. They seduce you. They humiliate you. They jeer at you. You interact with them. — Oliver Sacks

When traditional figures - devils, witches, or hags - are no longer believed in, new ones - aliens, visitations from "a previous life" - take their place. Hallucinations, — Oliver Sacks