The influence of physical education in producing and confirming, in females, deformity of the spine / by E.W. Duffin.

  • Duffin, Edward Wilson.
Date:
1829
Catalogue details

Licence: Public Domain Mark

Credit: The influence of physical education in producing and confirming, in females, deformity of the spine / by E.W. Duffin. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

    49/158 (page 31)
    disposition of these polished projections, pro- vision is made for allowing the column to be bent in almost every direction, as the wishes or necessities of the individual may require. Through the centre of this column runs a somewhat trilateral tube, for the purpose of containing the marrow of the backbone;* and on its summit rests the head, usually in an adult from seven to ten pounds troyj* in weight. A plane dividing the crown of the head, in the direction from before backwards, and continued vertically to the ground, when the individual is standing erect and looking straight forward, in the natural state, divides the back-bone into two halves. The spine, there- fore, in relation to the plane on which the per- son stands, and which intersects at right angles the dividing plane may be said to be ver- tical^ although it is also naturally curved an- teriorly and posteriorly. The vertical position is maintained, while the column itself is enabled to bear the weight of the head without yield- * Spinal marrow, or spinal chord. f The brain alone is four pounds, the cranium three pounds.