APMLE APMLE Biomechanics and Orthopedics

Question 1

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

Accepted Answer

Pronation

Answer

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

Question 2

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

Accepted Answer

2:1 ratio of supination to pronation

Answer

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

Question 3

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

Accepted Answer

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

Answer

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

Question 4

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

Accepted Answer

Double support

Answer

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

Question 5

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

Accepted Answer

Subtalar joint pronation

Answer

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

APMLE - American Podiatric Medical Licensing Examination Practice Test