. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 134. PELVIS. In twenty-five males, Nine were from 116° to 112°, five from 115° to 117°, nine from 1-20° to 125°, and two only 130°. In twenty-five females, Nine were- from 120° to 125°, eight from 128° to 130°, five from 133° to 140°, two were 145°, and one, an aged subject, 118° only. Fig. A' 9- Diagram (sl'ujhily altered from Naegele) of a well- formed female pelvis^ showing the angles of inclina- tion and axes. From these we may deduce 117° as the average sacro-vertebral angle in the male, and 130° as the same an
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. 134. PELVIS. In twenty-five males, Nine were from 116° to 112°, five from 115° to 117°, nine from 1-20° to 125°, and two only 130°. In twenty-five females, Nine were- from 120° to 125°, eight from 128° to 130°, five from 133° to 140°, two were 145°, and one, an aged subject, 118° only. Fig. A' 9- Diagram (sl'ujhily altered from Naegele) of a well- formed female pelvis^ showing the angles of inclina- tion and axes. From these we may deduce 117° as the average sacro-vertebral angle in the male, and 130° as the same angle in the jema/e. This remarkable average difference of 13° shows the much greater suddenness of the altera- tion of direction in the spinal column at its sacral extremity in the male subject, and is much greater than the difference of 5° to 6° in the pelvic inclination of the sexes com- pared in the tables of Weber and Nacgele. But, in order more clearly to ascertain it the pelvic inclination invariably depended upon the variations of the sacro-vertebral angle, I compared the sacro-vertebral and pelvKverte- bral angles in nine male and nine female sub- jects. In the former, I found the difference between these angles to vary from 5° to 35°, and, in the latter, to vary from 5° to 25°. In one instance only, in a male, the sacro-verte- bral was as large as the pelvi-vertebral angle. From these observations, which were very carefully taken, it would seem that the total pelvic inclination does not exactly depend upon the sacro-vertebral angle; and that, in males, where the average pelvic obliquity is a little greater, the average sacro-vertebral angle is much and disproportionately less. These results contradict, also, the assumption somewhat indefinitely stated by Blumenbach and others, on the authority of Bonaccioli, of Ferrara, that the sacrum inclines more backward, and that the sacro-vertebral angle is more promi- nent in the female than in the male.
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