Show greatest amount of our restlessness comes in the last few hours of sleep when you wake up alter after a sound nights slumber you may feel as though your rest was unbroken and continuous all night long really though your rest was unbroken and ing pattern of deep sleep stirring movement near arousal and then sinking down into the depths of quiet sleep again this pattern is repeated over and over ahr throughout the night but as morning approaches the depths of sleep become shallower and the sleeper is easier to awaken before the alarm clock finishes S the job this pattern of sleep was found in the course of experiments conducted at the department of physiology of the university of chicago with both dogs and human beings by electrical means the tos sings and st stirrings ir of the sleepers were recorded and measurement was made of the degree of noise required to disturb them each person seems to have wr h own pattern of movement and level of sensitivity to noise and he tends to follow this pattern more or less regularly the investigators said in reporting their findings to the journal of experimental psychology the ease with which a person can be awakened is related to the length of time since he last moved rather than the t time i me of the night individuals differ in both restlessness and soundness of their sleep but the differences feren ces are not always in the same direction for both factors on the average the most quiet sleeper is the one most easily aroused it was found in a normal nights sleep the greatest amount of tossing and also the most frequent spontaneous awakenings awaken ings of the sleeper come in the last few hours of sleep toward morn morning ing the sleep becomes shallower and shallower sometimes however the sleeper will settle down toward the end of his sleep for about forty five minutes of quiet deep slumber like that he enjoyed during the first of the night |