Insomnia and nerve strain / by Henry S. Upson ; with skiagraphic illustrations.

  • Upson, Henry Swift, 1859-1913.
Date:
1908
Catalogue details

Licence: Public Domain Mark

Credit: Insomnia and nerve strain / by Henry S. Upson ; with skiagraphic illustrations. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

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    stitute so large a part of normal human activity develops the fact that no distinc- tion can be drawn between normal and diseased emotion, that is emotion exists in absolutely unbroken series, from the lightest reflexes of a passing word or thought to the most profound result of the extremest physical or mental shock. Physical Basis of the Emotions.— The facts pertaining to the normal emo- tions are ably presented by William James in his Psychology. According to his view normal emotion, whether from physical or psychic causes, is always due to an. altered visceral condition. A sud- den noise or bright light or the sight of a revolver is the direct cause of the wildly beating heart, pallid face, motor unrest, and dilated pupils. The emotion is the cognition of these visceral changes. Ap- prehension of danger is not necessary to these phenomena, they may even appre- ciably precede the conscious sensation of fear. A man whose legs carry him off a battlefield finds that the faster he runs