It is that time of the year again for me: To attend the annual lecture of the Quinn Memorial, which has become a dear tradition to me. I started going to these fascinating and memorable lectures more than a dozen years ago and it is something I look forward to every year. The only times I have missed the Quinn Memorial were due to the pandemic where it was canceled or due to other commitments, for instance, work or appointments that I could not escape from.
Let it also be stated that part of my own personal tradition includes the complimentary and much appreciated glass of wine (I usually opt for red) as well as a brief chat and a few questions for the renowned speaker, all reasons why an online option is not feasible and only half the experience.
This time around I did something I had not done previously: I invited a handful of people to come along with me. Doing new things or doing things differently with its effects on memory will be discussed further below but the main reason I had not done this before was that as a generally reserved and private person, I like to go there alone. That way I could pay close attention and take notes during the talk. Also, I felt that I could freely mingle afterwards and talk to other guests and meet a variety of people. As a final point, it was also because I did not feel that many people in my social circle would be genuinely interested in these types of talks and lectures.
As the subject coincided with an upcoming book club discussion of Andy Clark’s The Experience Machine (more on this later as well), I figured that there might be some interest and perhaps overlap with group members, but alas, yet again, I ended up going solo. It was a shame because it was another wonderful talk that I would have loved to share with likeminded friends, but I get it, people are busy; they have busy lives and priorities, or they may simply not be as interested in these events as myself.
But enough preamble and let’s dive in! The talk was entitled “The wisdom of the unconscious mind: offline reactivation consolidates, integrates, and updates knowledge” by Dr. Lila Davachi from Columbia University. The title may not be on par with the talk itself; first off, I must admit that the title on its own does not necessarily sound sexy or exciting and may be a bit too technical particularly with the added subtitle. At the same time, the lack of capitals takes away from the transformative features that were included in the lecture itself, and finally, although it deals with the unconscious, it is a bit of a misnomer because the talk was more about brain processes than the mind per se.
Sadly, not much psychoanalysis to speak of and on the topic of dreams, Dr. Davachi simply stated that neither she nor anybody else she is familiar with has any clue or idea why we dream and what its purpose may be. I differ on this matter, but she has a valid point in terms of memory retrieval and consolidation of course and that was the main focus of her talk.
There were interesting insights alongside a new understanding of how memories are formed, how they are strengthened and/or weakened and, as a language instructor, I appreciated that she provided some useful tips and vital points on how to be able to consolidate them further so our memories and knowledge do not end up decomposing in the waste bin of our mind.
But what are the different processes that occur in the brain to ensure that we have memories in the first place? I remember from psych undergrad classes that memory was closely tied and connected with the hippocampus. And although that still holds true, the real story is much more complex and more intricate than that.
First off, there are two parts to memories, the encoding and then later its retrieval. The encoding is basically the input, which is then converted into a memory. This often occurs offline, that is the hippocampus replaying the information after the event. Yet the brain is not passive in any of this; it actively selects what to consolidate and what not. In other words, what is deemed relevant is offloaded and distributed to other cortical parts of the brain, and what is not is left behind and may be forgotten completely.
As a result, the memory becomes consolidated not just by replaying it but rather by having it play like an orchestra. If the memory itself is strong, that is salient, vivid and involves an emotional reaction, it becomes more resilient and has a much stronger survival rate. In fact, connectivity is crucial here and can protect against forgetting.
The retrieval itself can come from cues, with some of them being partial. This may be something we see or something someone says that then triggers a memory; we may actively look for specific information or try to recall an event in the past. This is also not only related to the context and the circumstances of the memory event, but it also depends on what happens afterwards, whether it is repeated consciously or subconsciously or not. Sometimes associations and associated occurrences can aid the memory to remain strong even in the face of time.
This can occur in different ways. One of them is reward. If we are expecting a certain reward, we may work harder to ensure that we can later recall the given information. Put differently, it is motivation that can ensure both short and long-term retrieval. This is even more prevalent when we have motivation to remember. Hence reward and repeated encodings improve memory retrieval. This is also true with any information that we prioritize, something that we cherish and value for whatever reason.
It is noteworthy that cortical networks are more stable than just the hippocampus. In this cortical dialogue and interaction, weak memories need to be replayed more than strong memories to ensure that they can be recalled at a later time. There is also a significant difference between recalling simple standalone episodic events versus the gist of the situations and with it some overlapping details. When memories are clustered together, they tend to be more resistant to the erosion of time.
Interestingly, the same can be applied to routine memories if they are combined with novel and interesting or intriguing information. For instance, social and special novelty helps both mood and memory. Going out of your way to take on different activities or to take a different route will not only help you better recall the new information, but it will also make you feel better, excited and aroused. At the same time, all this will color your regular routine actions and make them stand out more than previously or otherwise.
Let’s face it, if you are living on autopilot, your routine actions become a muddled and indiscriminate mess of sorts, and you would either confuse them or forget them altogether. But the moment you encounter something or someone new on your regular path, you remember everything much more vividly and in greater detail while also feeling good about the whole experience.
This is your cue to get out and do something differently. When you do this, you will feel more alive and remember it much better. Carpe diem may not just be about going out there and taking risks but also trying out something new and different. Sure it can involve minimal or moderate amounts of risk but more importantly, just stepping out of your comfort zone or regular routine can indeed aid your overall memory in this case.
Now to return to my book club reading of Andy Clark’s book. His theory is that the brain is not just a passive recipient of sensory information but that it plays an active role in the process. It is not just encoding and processing the information that crosses its path but it constantly tries to predict what will happen.
When the prediction is correct, we can save time and energy and focus on things of greater importance to us. This is not unlike our experience of driving. When we start off, we need to pay close attention to everything around us and try our best to move this metal box in a safe and sound manner. But after time, it becomes more innate and automatic and our brain takes over the driving until or unless something surprising and unexpected occurs needing our attention.
So, during the reception I had the opportunity to ask Dr. Davachi about the brain predicting events and whether salient information would help us remember them better. She said that most likely we would. I then asked her whether the new incoming information would override the previous predictive pattern or maybe have us forget it altogether and replace it with something new.
She said that it depended on how strong the pattern was encoded, whether it was part of a weak or a strong memory. If we took that path more than a dozen times, we may just carry on with as it may be resistant to a single episodic memory or minimal incongruent information. Hence, in the case that the pattern has been more entrenched, it would not be so easily abandoned and replaced.
All this has also some relevance with trauma and traumatic events. They can lead to rumination, which can occur both online and offline. Yet at the same time, they may also become stronger because the brain would read certain cues in that particular light and frame of mind. Hence, for a war survivor, any loud noise can be seen as a potential threat where fireworks or car exhaust backfires may feel threatening.
Yet, on the flip side, good experiences will fill us
with positive feelings, and we would look forward to other or similar events.
In my case, this was yet another outstanding and memorable event that makes me
look forward to the next one, regardless of whether I shall be accompanied or
not.
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