FNP Family Nurse Practitioner Exam Prep

Category - Women's Health Nurse Practitioner

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Which of these muscles flexes and externally rotates the hips, and may be a cause of lower back in pain in a patient?

Psoas major
Quadratus lumborum
Flexor digitalis
Vastus medialis
Gluteus maximus

Explanation

Answer: A The psoas major flexes and externally rotates the hip. It joins with the iliacus muscle to form the iliopsoas. Tension in this muscle is a common cause of lower back pain, as it often compresses the lumbar vertebrae.

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