You jolt awake from a dream — falling, running, or speaking to someone who’s no longer here and for a moment, it feels real.
Then it fades, leaving behind a question that has puzzled scientists and philosophers for centuries: why do we dream at all?
There are many different theories as to why we dream
(Press on them for more information)
Consolidation of memories
Our brain strengthens memories and improves learning by processing and storing new emotions and thoughts (why we are sometimes told to read notes before sleeping)
Processing emotions
It manages and regulates emotions by creating a symbolic memory of experiences, reducing the intensity of emotions over time. This is why problems that may seem terrible in the moment will seem much more manageable later on.
Rehearse of threats
A form of ‘threat simulation’ allowing the brain to practice responses to potential dangers, in a safe simulated environment, enhancing survival skills. This may seem like it was more necessary 2000 years ago but is a very useful ability.
Creative problem solving
Our brain can make looser, imaginative connections during sleep. These connections can then lead to creative insights and solutions to problems, that had been blocked by conventional thinking while awake. (Why you should always write down your dream if you think its a good story plot)
Products of random brain activity
Some believe they are just an accidental outcome of brain activity during the sleep cycle (but I’m not a big fan of this belief)
The origins of these theories:
Greeks and Romans were convinced dreams had certain prophetic powers. The theories continued in the 19th century by Sigmund Freud and Carl Jung:
(You can click on them)
Technological advancements have allowed for other theories to be developed, like the ‘activation-synthesis hypothesis’. Dreams don’t mean anything, they are just electrical impulses that pull thoughts and imagery from our memories. This theory is that humans construct dreams stories after they wake up, in a natural attempt to make sense of the brain activity.
However, vast research into the aspects of dreaming in humans, as well as in other mammals such as cats, has suggested that dreaming serves an important purpose. Evolutionary psychologists have theorised this through ideas like the threat simulation theory. This proposes that dreams allow the mind to safely rehearse responses to potential threats, preparing us for real-life situations. (I know I’m going to start paying more attention during my nightmares)
Studies and scientific research:
University of Rome study (remembering dreams):
Researchers invited 65 students to spend two nights in a sleep lab. On the first night, they slept normally, and on the second, their brain waves were measured. The study found that the same brain regions involved in forming memories while awake also play a role during sleep, particularly in dreaming.
Key areas such as the back, front, and middle parts of the brain are crucial for remembering dreams. The hippocampus, which helps create new memories, and the amygdala, which processes emotions, both influence how vivid and detailed dreams are. Difference in the size or structure of these regions can affect how clearly someone dreams or recalls their dreams.
EEG scans, which measure the brains electrical activity, showed that similar brain wave patterns appear when people remember things while awake and when they successfully recall dreams. This suggests dreaming isn’t random – it relies on many of the same brain system used for everyday memory and emotional processing.
Attached here is a link containing the experiment and further insight:
Now onto the most interesting bit…
Common dreams and their meanings
In conclusion… dreams remind us that even when our body rests, the mind stays active – weaving memories, emotions and imagination into stories that may never happen, but reveal how deeply human thought runs.
Do you remember your dreams – and do they ever feel meaningful to you?
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