File:Applied anatomy and kinesiology (1917) (14767125192).jpg

Identifier: appliedanatomyki01bowe (find matches)
Title: Applied anatomy and kinesiology
Year: 1917 (1910s)
Authors: Bowen, Wilbur P. (from old catalog)
Subjects:
Publisher: (n.p.)
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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arm and a large angle. Lifting the cal-caneum, it will depress the front of the foot; since the plantar liga-ments connect the calcaneum with the outer margin of the footonly, its entire force will be exerted there. Isolated action of the gastrocnemius extends first the ankle- andthen the tarsal joints; the latter joints being somewhat oblique,the last part of the movement depresses the outer margin of thefoot more than the inner, turning the sole somewhat inward. If,while the muscle is being stimulated, the observer pushes stronglyupward on the sole of the foot, the outer margin is found to bedepressed with great power, while the inner margin can be easilylifted and the arch straightened out in spite of the contraction.Stimulation of the gastrocnemius while the subject is standing atrest on his feet causes the heels to be lifted and the weight to besustained on the outer margin of the foot. SOLEUS. An associate of the gastrocnemius, lying beneath it on the backof the leu. SOLE us 175
Text Appearing After Image:
Fio. 105.—Muscles oi the ri^hl, lef>;, socmi from tlio ri^hl sido. (Ciorrisli.) 176 MOVEMENTS OF THE FOOT Origin.—^The upper part of the posterior surfaces of the tibia,fibula, and interosseous membrane. Insertion.—^By the tendon of Achilles into the calcaneum. Structure.—Penniform sheets. Action.—The soleus has the same pull and leverage on the footas the gastrocnemius, but lacks any connection with the femur. The gastrocnemius and soleus, sometimes called the triceps ofthe leg, act together in all such movements as standing, walking,running, jumping, dancing, climbing, etc., where the weight of thebody is supported on the feet and lifted by them. When the kneeis flexed to 90 degrees or more the gastrocnemius seems to be leftout of the coordination, leaving the work of extending the foot tothe soleus; in this position the heads of the former are so low thatit cannot pull effectively. In the frog the tibialis anterior reaches above the knee and isattached to the front of

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