In the restaurant industry we call that "The Door of Forgetfulness" and it was usually the walk-in door. You'd leave the line to get something from the walk-in, then stand there, forget what you needed, then have to go back to the line to remember. I used to joke that you actually left the memory behind. Guess maybe that's true to a point. Neat!! I'll let my fellow workers know that they're not forgetting because of something they smoked the night before It's science.

Wow, getting hit by a car messed with my memory but I cant say walking through a door way has ever done it. Maybe walking into one for some?

i know it works on cats as when i feed my cat and then kick it out for some peace and quiet it'll return about 10 mins later thinking that i've never fed it that day so i'm sure that door frame manufacturers are in league with cat food firms

Maybe that's why my son forgets what always gets him in trouble .

This makes so much sense, you walk around the house to the place you got to do somthing, you get to the room and the second you step inside the very thing you are there to do just vanishes.

What makes this make even more sense is that i often go back to where i just was, and remeber as i step back through the door what i had left to do!!!

CREEPY-COOL!

This is a good explanation!
I've never thought of that.
I'm boarding shut all of my doors now.

Thanks OP this makes sense to me.
I go upstairs to get something, forget and have to come downstairs to remember!

Makes sense! Possible that it can trigger a relapse or memory to why often it works to backtrack events when you have lost something. Guess that helps in triggering memory as well or of what was lost. Also, would think it's not limited to doorways but separate or different scenery.

Isn’t it strange, how can a door affect peoples thinking? Is this study proven or some are making a way to justify their flaws when forgetting a thing? If this theory is true you can bring a work home ‘coz you go outside the offices’ door. <_<

So doors make us believe in the here-after. When we go through the door we wonder what we are here-after.!!

So, what am I supposed to do when I decide I need something in another room, go through that door and forget what it was I needed in that new room?

I wonder if it helps to go back into the room I came from. I admit I do that, trying to recall what I was going to get.

The explanation offered does make sense to me, that going into a new room acts as a sort of separation of events and your brain compartmentalizes that previous event and stores it away, making it harder to recall...

So, it's not the actual act of walking through a door. it is just the brain preparing for the next event by storing away the memories/events of the past?

Interesting idea.

Most enlightening thanks OP. Possible relation with phenomena exhibited in the paraxial region, it could be the geometry is such that it affects the optic system, the only openly exposed area of the brain.

I've read somewhere a theory about why we forget things when we walk into a room.
They claime (it sound funny,but some people believe it,i don't believe that it's impossible) that some times when you walk into a room and forgot the reason,MIB are responsible.Like in the movies Men In Black,when a civilian sees an alien,the agents captured the alien and erased the victims memory.Something like that is believed that is happening.You probably see an alien,and thanks to their advanced technology,they use gadgets to erase your memory,so they can live amongst us without letting us know.