FIGURE 3.18. (A) Resisted hip flexion with the knee flexed isolates the iliopsoas tendon. Contribution from the sartorius is minimal as this is a very weak muscle. (B) Resisted hip flexion combined with knee extension recruits the rectus femoris, which crosses both joints as a hip flexor and knee extensor. (C) Resisted hip extension can be tested with the patient prone. (D) Another useful test for extensor weakness is to simply have the patient rise from the seated position with the arms crossed; this is difficult when significant extensor muscle weakness is present. (E) Manual testing of abductor strength is most easily performed in the lateral position. (F) Manual testing of adductor strength can similarly be tested, but with the patient supine.

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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