Discussion about this post

User's avatar
Barbara Schildkrout's avatar

Sensation vs perception! Joan, it sounds like you got a glimpse of how basic processes (sensations of touch, smell, etc) are organized into more complex experiences (perception). That's one fundamental principle of brain function. And "meaning" is an even more complex, "higher" level of processing and organization.

Expand full comment
Barbara Schildkrout's avatar

Joan, I really appreciate your comment. You clearly "get it!" In this post we talk about associations at the level of conscious awareness. But the basis of all thoughts, memories, realizations, and so on... is activity in the brain itself. I don't want to simply say that "it's so complex" that it is too difficult to explain, although there would be much truth to that. I also don't want to simply say that there's a huge amount about this that is not yet understood, although there is truth to that for sure. So, here is a very over-simplified statement about the little we know about associations at the level of the brain. A multitude of neurons (nerve cells--though glial cells also participate) are linked all across the brain and synchronously fire when a particular memory is brought to mind (reconstructed really). One element of a complex memory such as a scene with, for example, visual, auditory, olfactory, emotional, spatial, etc. aspects might also be part of another complex memory (a feeling of alienation or the ringing of a doorbell...anything) and that commonality may elicit the other memory.

But...even something that seems as simple as the ringing of a doorbell involves a complex set of connections (brining back the sound itself to mind, knowledge that it's a doorbell and not a wake-up alarm, associations to who might be arriving, etc.)

Every neuron is linked to hundreds of other neurons and these links are constantly (and I mean constantly) being altered with experience; new links may be created; links may be strengthened so that a particular neuronal connection will be more efficient. This is occurring at a molecular level, for instance, at the level of alterations in the actual molecular structure of receptor sites at synapses.

I'm curious as to how much of this kind of information you and others would like to learn about from our newsletter. Discussing the actual mechanisms can be pretty "dry" without a narrative. That said, I'm so so glad that you "get it!"

Expand full comment
6 more comments...

No posts