Identifier: hygienedentalge00turn (find matches)
Title: Hygiene, dental and general
Year: 1920 (1920s)
Authors: Turner, C. E. (Clair Elsmere), 1890-1974 Rice, William
Subjects: Hygiene Teeth
Publisher: St. Louis, C. V. Mosby
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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s round-shoulderedness compared with the natural contour. This condition is brought about by drawing the shouldersforward through the contraction of the muscles of the chestand the disuse of the muscles of the back so that finally themuscles become set in this position with the chest musclescontracted and the back muscles relaxed leaving the shouldersin a forward position, cramping the upper part of the chest 60 HYGIENE: DENTAL AND GENERAL and limiting the breathing. This deformity is brought aboutby a careless attitude at the desk or by leaning forward overones work, and the individual must develop consciousness ofphysical position in order to avoid incorrect posture. Cor-rective exercises, in consciously throwing the shoulders backwith the arms widely extended to one side or in raising thearms above the head at the same time drawing a deep breathand dropping the arms slowly during the period of exhaling,keeping the hands well to the rear, are effective in correct-ing this condition.
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Fig. 13.—Good (left) and bad (right) postures. The main lines of the bodyare shown in diagram and it is easy to see that the position at the right wouldbe much more tiring. (Burgerstein.) Carrying the Head Forward.—Another malady which oftenaccompanies round shoulders is the fault of carrying thehead too far forward. The neck becomes accustomed toan abnormal position and is no longer erect. This again isdue to the weakness of the muscles which hold the headback, and the set contraction of the muscles which pullthe head forward. One of the first corrective exercises forboth these conditions is that of flattening the back against HYGIENE OF ACTION 61 a straight, perpendicular wall. The individual backs up toa door or wall and places himself in such a position that thecalves of the legs, the hips, the shoulders, and the back ofthe head lie flatly against the wall. This is approximatelythe normal posture and if a man walks away in this position TRACINGS MADE DURING EXAMINATION OF 700

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