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 1 [Title]|                                   On Sleep and Sleeplessness~
 2 1      |                     1~WITH regard to sleep and waking, we must consider
 3 1      |            is clear, that waking and sleep appertain to the same part
 4 1      |              they are opposites, and sleep is evidently a privation
 5 1      |              when they are awake, or sleep, when they are awake, or
 6 1      |              when they are awake, or sleep, when they are asleep.~But
 7 1      |    potentiality of perception. [Thus sleep and waking are not attributes
 8 1      |           nutrient; it is clear that sleep and waking are not affections
 9 1      |          that [of those which either sleep or wake] there is no animal
10 1      |              that this should either sleep or wake; since both these
11 1      |        Finally, if such affection is Sleep, and this is a state of
12 1      |        continue always sleeping. For sleep is an affection of the organ
13 1      |             while one is asleep. All sleep, therefore, must be susceptible
14 1      |       clearly observed to partake in sleep, whether they are aquatic,
15 1      |     manifestly assume the posture of sleep; but the sleep of all such
16 1      |            posture of sleep; but the sleep of all such creatures is
17 1      |   observation to decide whether they sleep or not. Of testaceous animals,
18 1      |            to determine whether they sleep, but if the above reasoning
19 1      |               therefore, all animals sleep may be gathered from these
20 1      | sense-perception; and we assert that sleep is, in a certain way, an
21 2      |             that in the state called sleep the same affection must
22 2      |             many considerations that sleep does not consist in the
23 2      |    compressed become insensible. But sleep supervenes when such incapacity
24 2      |             experience, men apply to sleep this metaphorical term,
25 2      |               whence it follows that sleep belongs of necessity to
26 2      |               or the organ in which, sleep and waking originate, is
27 2      |           Some persons move in their sleep, and perform many acts like
28 3      |             occurrence of waking and sleep. For sleep, as has been
29 3      |             of waking and sleep. For sleep, as has been shown, is not
30 3      |                As we observed above, sleep is not co-extensive with
31 3      |         return has repulsed the hot, sleep comes on, and the animal
32 3      |              the things which induce sleep; they all, whether potable
33 3      |          after meals especially that sleep comes on like this, for
34 3      |        effect; infants, for example, sleep a great deal, because of
35 3      |              epileptic seizures; for sleep is like epilepsy, and, in
36 3      |         takes place with many during sleep, and their subsequent habitual
37 3      |           habitual seizures occur in sleep, not in waking hours. For
38 3      |         large heads, are addicted to sleep. For in the former the veins
39 3      |           the veins, not addicted to sleep, unless, indeed, they labour
40 3      |             atrabilious" addicted to sleep, for in them the inward
41 3      |              what has been said that sleep is a sort of concentration,
42 3      |      eye-lids droop. Accordingly [in sleep] the upper and outward parts
43 3      |         difficulty on the facts that sleep is most oppressive in its
44 3      |        properties, are productive of sleep, for it is not probable
45 3      |              it is not probable that sleep should be a process of cooling
46 3      |             been observed elsewhere, sleep comes on when the corporeal
47 3      |             sink down [as they do in sleep] when the heat which tends
48 3      |            hot.~A person awakes from sleep when digestion is completed:
49 3      |    especially in need of separation, sleep [then especially] occurs [
50 3      |             place animals awake from sleep, being released from the
51 3      |             we have also stated what sleep is, having shown that it