system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why is it hard to remember dreams?
gpt
It is difficult to remember dreams, because dreams take place in the brains pre-frontal cortex whereas memories and movements are stored in the cerebral cortex. Lucid dreams occur when our dreams drift into our cerebral cortex. This is the kind of thing that you learn in Neurology 101!

Fox, Mason T. "Christopher A. Walsh, MD, PhD Research Abstract | HHMI.org." HHMI.org. Penguin Publishing, 17 Jan. 1997. Web. 08 Apr. 2015.