forget me not?

senility. Older people can lose their ability to assimilate sudden sensory information, and this is why they begin to forget what are attempting to do. hence,  they  get up to go do something in another room and once they are in the room, they are so overwhelmed by a completely new set of sensory input; new sights, smells and sounds and in attempt to try to process it all, they put everything else into the background including as to why they came into the room in the first place. what do you think  of this idea as to why older people forget so much due to when they begin to lose the ability to process information as quickly as they used to do?