Stammering, stuttering, and other speech affections : their causes and cure / by W. Abbotts.

  • Abbotts, William
Date:
1898
Catalogue details

Licence: Public Domain Mark

Credit: Stammering, stuttering, and other speech affections : their causes and cure / by W. Abbotts. Source: Wellcome Collection.

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    aloud, it is necessary to have a full supply of air in the lungs. If, on the other hand, the lungs are partly empty, and the walls of the chest are consequently collapsed and fallen in, with the muscular division (the diaphragm) be¬ tween the chest and abdomen drawn upwards, the voice will be necessarily weak and indistinct through want of breath sufficient to sustain the effort of speaking a long sentence and distinctly pronouncing each word of it. Commencing, then, from the starting-point, the lungs, we may trace the current upwards along the trachea into the larynx, where it becomes vocalised in passing through the narrow aperture called the Rima Glottidis (chink of the Glottis) between the Chordce Vbcaks, or Vocal Chords, or Ligaments. Thence it passes forwards through the cavity of the mouth, and out between the lips, having, after leaving the vocal chords, acquired an articulate character. The vocal chords, placed at the upper part of the trachea in close relation to certain cartilages, are approximated, separated, lengthened, or shortened by various small muscles grouped around them and regulating their tension, and other conditions. Other parts—the pharynx, the soft palate, the posterior nasal openings, the tongue, the teeth, and the lips—are further concerned in modifying the sounds, so as to convert them into articulate sounds, constituting, in connection with the vocal sounds formed at the vocal chords, what is com¬ monly described as Speech. The muscles about the larynx are capable of con¬ siderable development and improvement with regard to their perfection of action, by practising the voice, as in
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