- profound - problems
Storing information so that you can easily find it is a challenge. Somewhere within the dense, damp and intricate 1.5kg of tissue that we carry in our skulls, all of our experiences are processed, stored, and - sometimes more readily than others - retrieved again when we need them.
Source: BBC, Peeking into the brain's filing system, 5 July 2015
A key component is the small, looping structure called the hippocampus, buried quite deep beneath the brain's wrinkled outer layer. It is only a few centimetres in length but is very well connected to other parts of the brain.
People with damage to the hippocampus have profound memory problems and this has made it a major focus of memory research since the 1950s.