Sleep spindles and k-complexes are most often associated with sleep.
stage 1
stage 2
stage 3 and stage 4
rem

Initially, northerners did not want missouri to be included in the union because 1.) maine would not be allowed to enter the union as a free state 2.) missouri wanted to enter the union as a free state 3.) missouri wanted to enter the union as a slave state 4.) maine would not be allowed to enter the union as a slave state