ILLUSTRATIONS
Reading edition
FIG.
1. The thoracic cage and its contents
2. The diaphragm and its attachments
3. Diagram illustrating changes of the chest and abdomen in breathing
4. Diagram of the cartilages of the voice-box or larynx with vocal cords
5. Front view of the larynx with muscles
6. Back view of the larynx with muscles
7. Diagram to illustrate movements of cartilages in breathing and phonation
8. Section through larynx and windpipe, showing muscles and vocal cords
9. The laryngoscope and its use
10. The glottis in breathing, whispering, and vocalisation
11. The vocal cords in singing, after French
12. Vertical section through the head and neck to show the larynx and resonator
13. Diagram (after Aikin) of the resonator in the production of the vowel sounds
14. König's flame manometer
15. Diagram of a neurone
16. Left hemisphere, showing cerebral localisation
17. Diagram to illustrate cerebral mechanism of speech, after Bastian
18. The course of innervation currents in phonation
THE BRAIN AND THE VOICE IN SPEECH AND SONG
In the following pages on the Relation of the Brain to the mechanism of the Voice in Speech and Song, I intend, as far as possible, to explain the mechanism of the instrument, and what I know regarding the cerebral mechanism by which the instrument is played upon in the production of the singing voice and articulate speech. Before, however, passing to consider in detail the instrument, I will briefly direct your attention to some facts and theories regarding the origin of speech.