Insomnia : and other disorders of sleep / by Henry M. Lyman.

  • Lyman, Henry M. (Henry Munson), 1835-1904.
Date:
1885
Catalogue details

Licence: Public Domain Mark

Credit: Insomnia : and other disorders of sleep / by Henry M. Lyman. Source: Wellcome Collection.

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    CONTENTS CHAPTER I. THE NATURE AND CAUSE OF SLEEP. Definition of sleep—The invasion of sleep—The hypnagogic state— Depth and duration of sleep—Diagrammatic illustration of the phases of sleep—Modifications of physiological functions pro- duced by sleep—Effect of sleep upon the processes of respira- tion, circulation, calorification, secretion, and nutrition—Conse- quences of the progressive invasion of the nervous system by sleep—Effect upon the organs of special sense—Effects observed in the muscular apparatus of the body—Condition of intellectual functions during the invasion of sleep—Does the mind ever sleep?—Arguments adduced by Sir William Hamilton and others to prove the continued activity of the mind during the sleep of the brain—Reasons for supposing that the mind may sleep—Variability of the depth of sleep—Experiments of Kohl- schiiter to estimate the degree of variation—Alternation of day and night considered as a cause of sleep—Diminution of sensa- tion a cause of sleep—Illustrative observation by Striimpell — Fatigue a cause of sleep—Hypothesis of Obersteiner regarding the cause of sleep—Hypothesis of Pfluger—Production of arti- ficial sleep by impregnation of the brain with narcotic sub- stances—Analogous production of natural sleep by accumulation of cerebral waste-products—Observations regarding the duration of sensory impressions requisite for the excitement of conscious perception — Difference between syncope and sleep—Observa- ' tions of Mosso regarding the state of the cerebral circulation during sleep—Cause of the change in the cerebral circulation during sleep—Molecular conditions necessary for the production of sleep—Somnolence — Sleeping Dropsy, or Maladie du Som- meil—Coma—Lethargy—Apparent death—Lucid lethargy.