Nervous and Mental Physics

Nervous and Mental Physics

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1884 edition. Excerpt: ...Molecular rotations. Hearing = Io'e], 4o to 40,000 aerial pul sations per second. Sight = Io'f +, Rhodopsin bleaching by atomic vibrations 392 Io" to 757I0" per second. Heat = 1o'g+, Irregular vibrations with amplitudes and lengths increasing I m. per 3 C. per second. The law of diffusion may assist in seeking the values of a to g. Some effects of diffusion upon nerves are secondary such as those resulting from the heart palpitations, tremblings, flushings, etc.; but primarily diffusion may increase or decrease general sensibility, tactile in production of formications, gustatory sense in producing taste impressions (occasionally during fright, anger, or electrical stimulations of other nerves, showing close relationship of taste and tactile), vaso-motor and motor disturbances. Sometimes tinnitus is induced, but this may be secondary from vascular changes. Audition, olfaction, and sight are in health generally beyond the range of diffusion of nerve excitement. For working purposes, arbitrary values of a to f may be taken as ranging from 2 to 7. Heat having an altogether different motion from the other forces, g would have a hyperneurotic general value to be considered apart. Thus the higher molecular energies, as electricity, light, heat, and the moleculo-molar energy, sound, may stimulate sensations of each other in a descending series, and produce tactile and motor phenomena, but, as a rule, the lower rate of vibrations cannot produce the higher, except in abnormal conditions of the nerves when hallucinations of the higher senses are possible. This explains why paraesthesiae are so common as to pass almost unnoticed, but aberrations of the higher senses denote profounder disease. The loss of taste and smell...show more

Product details

  • Paperback | 26 pages
  • 189 x 246 x 1mm | 68g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236960114
  • 9781236960115