Long-Term Memory
Long-term memory is the memory that allows you to remember quotes from your favorite book, scenes from your movie, or lyrics from your favorite song. Long-term memory has a nearly unlimited capacity and a nearly unlimited duration, unlike the other two memories. Long-term memory works by making physical connections between neurons in the brain, establishing memories permanently. The only ways for long-term memory to be "forgotten" is for the connections among neurons to become weakened by disease or merely not being used for long enough, or overwriting of old memories by new ones which interfere with the old.