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Figure 4 | Chiropractic & Osteopathy

Figure 4

From: Common errors and clinical guidelines for manual muscle testing: "the arm test" and other inaccurate procedures

Figure 4

MMT of the psoas major muscle. It shows that the quadriceps, sartorius, and adductor muscles all assist in holding the hip in a flexion position. However, the line of pull of the muscle and the direction of the examiner's pressure place emphasis on the action of the right psoas major, making identification of inhibition in this specific muscle possible.

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