Post by Mike DuffyIn the end, we experience the world
as stuff that the brain makes up.
True. From a temporal perspective though,
we experience the world as memories we
have made up in the past. The present is
just memory created ~250 ms ago.
And every time you remember something.
you are actually remembering the last
time you remembered that event.
To address the question of whether humans experience the world live or if
the optical nerve first creates a memory that is then perceived, we need
to delve into the processes of visual perception and neural processing.
1. The Process of Visual Perception
When light enters the eye, it passes through several structures including
the cornea, lens, and vitreous humor before reaching the retina at the
back of the eye. The retina contains photoreceptor cells known as rods and
cones, which convert light into electrical signals. These signals are then
transmitted via the optic nerve to various parts of the brain for
processing.
2. Role of the Optical Nerve
The optical nerve does not create memories; rather, it serves as a conduit
for transmitting visual information from the retina to the brain. This
transmission occurs in real-time, meaning that as light hits our eyes, our
brains are simultaneously receiving and processing this information almost
instantaneously.
3. Brain Processing and Perception
Once visual information reaches the brain, particularly areas such as the
primary visual cortex (located in the occipital lobe), it undergoes
complex processing. This involves interpreting shapes, colors, motion, and
depth. The brain integrates this sensory input with prior knowledge and
experiences stored in memory to construct a coherent perception of what we
see.
4. Live Experience vs. Memory Formation
While our perception is influenced by past experiences (memories), it is
important to note that we do not perceive through a memory filter in
real-time; rather, we perceive live stimuli while simultaneously
referencing past experiences for context. This means that although memory
plays a crucial role in how we interpret what we see, our initial
experience of visual stimuli occurs live.
In summary, humans experience visual stimuli live through direct sensory
input processed by their brains almost instantaneously. Memories influence
interpretation but do not precede perception.
5. Conclusion
Thus, humans experience the world live; the optical nerve transmits
real-time visual information to be processed by the brain without first
creating a memory that is then perceived.