DPM Biomechanics & Gait Analysis 2

Question 1

During the loading response phase of gait, which muscle group acts eccentrically to control the rate of foot plantarflexion?

Accepted Answer

Tibialis anterior

Answer

The tibialis anterior contracts eccentrically during loading response to lower the foot to the ground in a controlled manner.

Question 2

The 'double support' phase of the gait cycle refers to:

Accepted Answer

Both feet simultaneously in contact with the ground

Answer

Double support occurs twice per gait cycle when both feet are simultaneously on the ground, comprising approximately 20% of the cycle in normal walking.

Question 3

Which kinematic variable most reliably differentiates normal walking from antalgic gait?

Accepted Answer

Shortened stance phase on the painful limb

Answer

In antalgic gait, the stance phase on the painful limb is shortened as the patient unloads it quickly to minimize pain.

Question 4

Root's criteria for a 'normal' subtalar joint neutral position includes the forefoot being:

Accepted Answer

Perpendicular to the bisection of the posterior calcaneus

Answer

Root defined the ideal forefoot position as perpendicular (90°) to the bisection of the posterior calcaneus when the subtalar joint is in neutral.

Question 5

Which segment of the foot is considered the primary shock absorber during initial contact?

Accepted Answer

Calcaneal fat pad

Answer

The calcaneal fat pad is highly specialized adipose tissue that absorbs and dissipates impact forces at initial contact.

(DPM) Doctor of Podiatric Medicine Practice Test

(DPM) Doctor of Podiatric Medicine Practice Test

DPM Biomechanics & Gait Analysis 2