The origin and nature of the emotions; miscellaneous papers . ofdeath. An examination of the brain-cells of these animalsshowed physical changes identical with those produced byexhaustion from other causes, such as prolonged physicalexertion or emotional strain (Figs. 45 and 46). After onehundred hours of wakefulness the rabbits were allowed along period of sleep. All the brain-cells were restored exceptthose that had been in a state of complete exhaustion. Asingle seance of sleep served to restore some of the cells,but those which had undergone extreme changes requiredprolonged rest. These ex
The origin and nature of the emotions; miscellaneous papers . ofdeath. An examination of the brain-cells of these animalsshowed physical changes identical with those produced byexhaustion from other causes, such as prolonged physicalexertion or emotional strain (Figs. 45 and 46). After onehundred hours of wakefulness the rabbits were allowed along period of sleep. All the brain-cells were restored exceptthose that had been in a state of complete exhaustion. Asingle seance of sleep served to restore some of the cells,but those which had undergone extreme changes requiredprolonged rest. These experiments give us a definite physi-cal basis for explaining the cost to the body mechanismof maintaining the conscious state. We have stated that thebrain-cell changes produced by prolonged consciousness areidentical with those produced bj physical exertion and byemotional strain. Rest, then, and especially sleep, is neededto restore the physical state of the brain-cells which havebeen impaired, and as the brain-cells constitute the central 142 THE EMOTIONS. ;:fc ?i v>4; y. ?na ^ . • ^.i 1—1 ^ Li . , . H o O ?- < P5 ? ^!n 5 ^ Cm W ^ ^ n K y, o o o w ay, o B c ^i ?. 03 W rt H tu o Zi 3 tin O ?5 m 2 -t1 S; i^ .::^ o s ,-H < rS f. 6 *^X 9 f
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