File:An academic physiology and hygiene (1903) (14778757614).jpg

Identifier: academicphysio00bran (find matches)
Title: An academic physiology and hygiene ..
Year: 1903 (1900s)
Authors: Brands, Orestes M. (from old catalog) Van Gieson, Henry C., (from old catalog) joint author
Subjects: Hygiene Physiology
Publisher: Boston, B. H. Sanborn & co
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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les of the Neck.—The muscles of the neck arenumerous and complicated. Those in front are renderedmore complicated by the position of the bone near theroot of the tongue (the hyoid bone), to which several ofthem are attached. These muscles extend upward to thehead, but some of them attach themselves to the hyoidbone, while smaller muscles extend from that bone up-ward. The muscles of the front of the neck bend thehead forward, draw the lower jaw down and thus open themouth, aid in moving the organs of speech, and assist in Jlowing. The muscles of the sides of the neck bendthe head to the side when those on one side act alone,and rotate the head on the spine. When those of hotlysides act together, they aid in keeping the head erect.The muscles in the back of the neck draw the head back-ward, raise the shoulders, and also aid in holding the headerect. 5. Muscles of the Trunk. — The muscles of the trunk arethose that cover the front, .sides, and back of the thorax ACADEMIC PHYSIOLOGY.
Text Appearing After Image:
or chest, and those thatform the walls of the ab-domen. There are alsosome internal musclesthat properly belong tothe trunk. 6. The muscles of thebreast cover the upperand front part of the EXPLANATION. r i, extensors of the hand ; 2, flexors ofthe hand, wrist, and fingers; 3, biceps,bends the fore-arm; 4, deltoid, raisesthe arm and moves it backwards and 2 forwards; 5, triceps, extends the fore-arm ; 6, trapezius, moves the headbackward, sideways, etc., and raises theshoulder ; 7, latissimus dorsi, assist inrespiration, aid in lowering the armwhen raised, etc. ; 8, glutceus maxi-mus, raises the thigh backward and out-ward ; 9, vastus externns, aids in extend-ing the leg; 10, biceps cruris, aids inbending the leg on the thigh ; 11, gas-trocnemius, forms the calf of the leg,and aids in extending the foot; 12, flex-ors, of the foot; 13, tendo Achilles, at-tached to the heel and to 11. chest. The peetoralismajor or great muscle ofthe breast has an exten-sive attachment to theribs, breast

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