There will be no one like us when we are gone, but then there is no one like anyone else, ever. When people die, they cannot be replaced. They leave holes that cannot be filled, for it is the fate - the genetic and neural fate - of every human being to be a unique individual, to find his own path, to live his own life, to die his own death.
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.
Interpretation
What this quote means
The quote explains that during hallucinations, specific brain areas responsible for perception become highly active, distinguishing these experiences from mere imagination.
Oliver Sacks highlights the neurological basis of hallucinations, identifying that they trigger heightened activity in the brain regions typically associated with sensory perception. This points to the idea that hallucinations are not simply figments of imagination, but rather autonomous activities that can be observed and measured in the brain, providing insight into how our mind processes reality and illusions differently.
Themes
In practice
Example use cases
In a lecture on mental health, you can quote Sacks to explain the neurobiological differences between hallucinations and imagination.
More from Oliver Sacks
All quotes →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.
Dr. Kertesz mentioned to me a case known to him of a farmer who had developed prosopagnosia and in consequence could no longer distinguish (the faces of) his cows, and of another such patient, an attendant in a Natural History Museum, who mistook his own reflection for the diorama of an ape
Music can lift us out of depression or move us to tears - it is a remedy, a tonic, orange juice for the ear. But for many of my neurological patients, music is even more - it can provide access, even when no medication can, to movement, to speech, to life. For them, music is not a luxury, but a necessity.
We see with the eyes, but we see with the brain as well. And seeing with the brain is often called imagination.
I rejoice when I meet gifted young people... I feel the future is in good hands.
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Those who study the stars have God for a teacher.
The unreasonable efficiency of mathematics in science is a gift we neither understand nor deserve.
I think of the brain as a computational device: It has a bunch of little components that perform calculations on some small aspect of the problem, and another part of the brain has to stitch it all together, like a tapestry or a quilt.
At the last dim horizon, we search among ghostly errors of observations for landmarks that are scarcely more substantial. The search will continue. The urge is older than history. It is not satisfied and it will not be oppressed.
Fortunately, there's another handy driver that has manifested itself throughout the history of cultures. The urge to want to gain wealth. That is almost as potent a driver as the urge to maintain your security. And that is how I view NASA going forward - as an investment in our economy.