People with sleep apnea tend to experience a range of daytime mental symptoms primarily due to the lack of restorative sleep from waking up multiple times an hour thought out the entire night. These symptoms include fatigue, shortened attention span, moodiness, and especially reduced short-term recall. People with sleep apnea have trouble converting short-term memories into long term ones. Consolidating memories, or storing experiences so that they can be accessed later, is a vital link in the memory-creating process that occurs during sleep.