Neuroscientist
Neil Burgess gives us a good understanding on how the hippocampal, the area
responsible for memory, works to create a cognitive map for us to know where
you we parked the car or if we going in the right direction. My husband seems to have a good sense of
direction and always does all the driving anytime we take a trip. I on the
other hand don’t feel I am as good in finding my way.
Neil
Burgess points to studies with rats and mice that point to the finding that the
brain neurons communicate with each other by sending little pulses or spikes of
electricity marking a spot in the space the rats are in. Together these space
cells form a map for the rest of the brain, informing where you are. Place
cells activating each other via dense interconnections and then reactivating
boundary cells to create the spatial structure of your surroundings and
viewpoint. Grid cells move this
viewpoint through that space. Head direction cells, fire like a compass providing
the viewing direction from which you generate an image for your visual imagery.
This is an impressive mechanism that all works together to tell you where you
parked your car.
The
hippocampal continues to grow as place cells, grid cells, boundary cells,
head-direction cells and visual imagery continue to develop its cognitive map. This explains why my husband is better at
direction then I am. He simply does more driving and his hippocampal is more developed.
I tend to do less driving and in fact if I am going somewhere for the first
time I would rather ask my husband to take me then to make the effort to learn
how to get there. Well, based on this, I think I will try to do more of the
driving and develop my hippocampal to get better at knowing my way around.
Below is the link for
Neil Burgess Ted Talk:
I never thought about how we remember where we park. There have been very few times that I ever had an issue with this, however, I do an incredible amount of driving as I commute over an hour to Stockton during the regular semester. It is crazy to think that we have a built-in compass in our heads that is used to navigate us to where we parked. Since older adults have a harder time finding where they parked, I wonder if it is due to a decrease in driving mobility or if it is a deterioration in their hippocampus.
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