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APMLE Biomechanics and Orthopedics Flashcards

6 cards from real APMLE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which term describes the triplanar motion of the subtalar joint that includes dorsiflexion, abduction, and eversion?

    Answer: Pronation

    Pronation of the subtalar joint is a triplanar motion combining dorsiflexion, abduction, and eversion.

  2. What is the normal range of motion for subtalar joint pronation to supination?

    Answer: 2:1 ratio of supination to pronation

    The normal subtalar joint has a 2:1 ratio of supination to pronation range of motion.

  3. Which axis of the subtalar joint is responsible for its triplanar motion?

    Answer: Oblique axis oriented 42° from transverse and 16° from sagittal plane

    The subtalar joint axis is oblique, oriented approximately 42° from the transverse plane and 16° from the sagittal plane.

  4. What is the term for the period of gait when both feet are in contact with the ground simultaneously?

    Answer: Double support

    Double support refers to the brief period in normal gait when both feet are simultaneously in contact with the ground.

  5. A patient presents with a forefoot varus deformity. Which compensation occurs at the subtalar joint during gait?

    Answer: Subtalar joint pronation

    Forefoot varus causes the subtalar joint to pronate to allow the medial forefoot to contact the ground.

  6. Which muscle is the primary invertor of the foot and is commonly tested when evaluating posterior tibial tendon dysfunction?

    Answer: Tibialis posterior

    The tibialis posterior is the primary invertor of the foot and its dysfunction leads to adult-acquired flatfoot deformity.

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  1. apmle.com — Exam dates, fees, registration deadline, registration, late registration, retake policy, passing score, score release, eligibility, time limit · verified Oct 2026
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