DPM Anatomy & Physiology

Question 1

What part of the foot is responsible for weight-bearing during walking?

Accepted Answer

Metatarsals

Answer

The metatarsals are the five long bones located in the midfoot, connecting the tarsal bones to the phalanges (toes). During walking, these bones, particularly the heads of the metatarsals, bear a significant portion of the body's weight, especially during the push-off phase of gait. They play a crucial role in distributing pressure and providing leverage for movement.

Question 2

What is the primary function of the tibialis posterior muscle in the lower leg?

Accepted Answer

Plantarflexion and inversion of the foot

Answer

The tibialis posterior muscle is a deep muscle in the posterior compartment of the lower leg. Its primary actions are plantarflexion (pointing the foot downwards) and inversion (turning the sole of the foot inwards). It is also a key stabilizer of the medial longitudinal arch of the foot, helping to maintain its structure and function.

Question 3

What is the role of the flexor hallucis longus in foot movement?

Accepted Answer

Plantarflexion and toe flexion

Answer

The flexor hallucis longus muscle originates from the fibula and inserts into the great toe. Its main functions are to powerfully flex the great toe (hallux) and assist in plantarflexion of the ankle. This muscle is particularly active during the push-off phase of walking and running, providing propulsion.

Question 4

Which of the following bones form the arch of the foot?

Accepted Answer

Talus and calcaneus

Answer

The talus and calcaneus (heel bone) are two of the seven tarsal bones that form the posterior part of the foot. These bones, along with other tarsals and metatarsals, articulate to create the complex structure of the foot's arches. The talus sits atop the calcaneus, forming a critical part of the ankle joint and the longitudinal arches, which are essential for weight distribution and shock absorption.

Question 5

What is the primary function of the plantar fascia in the foot?

Accepted Answer

Supports the arch and absorbs shock

Answer

The plantar fascia is a thick band of connective tissue running along the bottom of the foot, from the heel bone to the toes. Its primary function is to support the medial longitudinal arch of the foot, preventing it from flattening during weight-bearing. It also acts as a crucial shock absorber, distributing forces across the foot during activities like walking and running.

(DPM) Doctor of Podiatric Medicine Practice Test

(DPM) Doctor of Podiatric Medicine Practice Test

DPM Anatomy & Physiology