[Spock takes a moment to consider before answering....]

Your brain, spinal cord and peripheral nerves make up a complex, integrated information-processing and control system known as your central nervous system. In tandem, they regulate all the conscious and unconscious facets of your life. Perhaps the most fascinating questions about memory have to do with the connection between human consciousness and memory and how your body retains everything through this control system.
Though it is commonly known that humans only use approximately ten percent of their brain... it remains a common misconception. The potential for retaining information far exceeds even your own comprehension.
Are you able to tell me that you have not somehow 'changed' while being exposed to this place?
Though you may have no memory of this place when you return to your own universe... who is to say that the other ninety percent of your mental capacity or your control system has not retained the psychological and sociological changes you have experiences here? Others may comment that you have either changed or 'grown'... You cannot deny that this theory has merit.

May I ask what happened to for you to want to erase your memories?