Essential points of difference between the larynx of the negro and that of the white man / by George Duncan Gibb.

  • Gibb, Sir George Duncan, 1821-1876.
Date:
1865
Catalogue details

Licence: Public Domain Mark

Credit: Essential points of difference between the larynx of the negro and that of the white man / by George Duncan Gibb. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    its slanting surface, it would roll into tlie little bag or ventricle at its side. The ventricle of the larynx of the Negro may be compared to the saddle-bags at the sides of a mule, whilst the sloping sides of the saddle would represent the obliquely turned vocal cords, and the summit or pommel, the glottis. The difference in the position of the ventricles in the two races is shown in the two annexed figures. Figs. 4, 5. Fig. 4 represents a vertical section of the laiynx from right to left in the white, and fig. 5, in the black man. Pig. 4. a a. Section of the flat vocal cords, b b. Section of the ventricles. Fig. 5. a a. Section of the oblique vocal cords, b b. Section of the pen- dent ventricles. As the ventricles in both races are formed or surrounded by the thyro-arytenoid muscles on their inferior, exterioi', and superior sides, the relative position of these muscles must necessarily be altered in the two races. This might be in- ferred by a reference to the annexed figure 6 (after Luschka), showing a section through these muscles and the ventricles near the point of origin of the true vocal cords in the white