CFO Biomechanics & Gait Analysis 3

Question 1

What is the difference between step length and stride length in gait analysis?

Accepted Answer

Step length is heel to heel of opposite feet; stride length is heel to heel of the same foot

Answer

They are synonymous terms referring to the same measurement

Answer

Step length is heel to heel of the same foot; stride length is heel to heel of opposite feet

Answer

Step length measures vertical displacement; stride length measures horizontal displacement

Question 2

Which of the following best describes the concept of the center of mass (COM) during normal gait?

Accepted Answer

It moves in a sinusoidal vertical and lateral pattern

Answer

It remains stationary throughout the gait cycle

Answer

It drops sharply during double support

Answer

It rises during midstance and falls during terminal stance

Question 3

A patient with tibialis anterior weakness requires which AFO design to address the gait deficit?

Accepted Answer

Posterior leaf spring AFO

Answer

Solid ankle AFO in plantar flexion

Answer

Supramalleolar orthosis

Answer

UCBL heel cup

Question 4

What is cadence in gait analysis?

Accepted Answer

The number of steps taken per unit time, typically steps per minute

Answer

The number of steps taken per unit distance

Answer

The speed of gait measured in meters per second

Answer

The ratio of stance phase to swing phase duration

Question 5

Excessive subtalar pronation during gait most commonly leads to which secondary biomechanical consequence at the knee?

Accepted Answer

Internal tibial rotation and increased medial compartment stress

Answer

Increased lateral patellar tracking and IT band tightness

Answer

Genu varum and decreased Q-angle

Answer

Hyperextension of the knee during terminal stance

Question 6

Which gait parameter is most directly reduced in a patient with bilateral hip flexion contractures?

Accepted Answer

Stride length

Answer

Cadence

Answer

Swing phase duration

Answer

Step width

Question 7

During the push-off phase of gait, which joint motion sequence is most important for efficient propulsion?

Accepted Answer

Knee extension, ankle plantarflexion, MTP dorsiflexion

Answer

Hip extension, knee flexion, ankle dorsiflexion

Answer

MTP dorsiflexion, ankle plantarflexion, knee extension

Answer

Ankle dorsiflexion, MTP plantarflexion, hip flexion