| A | B |
| Stage 1 sleep | Still awake; begin sleep dive. Often experience hallucinations |
| latent content | hidden meaning of dream; unconcious motivation for dream |
| manifest content | story line of dream |
| circadian rhythm | body clock that is set to 24-hour day |
| Stage 2 sleep | stage of sleep where brain waves show sleep spindles |
| Stage 3 sleep | transition to deepest stage of sleep |
| Stage 4 sleep | with Stage three sleep, called slow wave sleep. Hard to wake |
| REM sleep | stage of sleep in which we dream |