Physiology & Rehabilitation MCQs

According to Saunders' determinants of gait, which of the following kinematic mechanisms is most responsible for minimizing the vertical displacement of the center of gravity during the peak of the stance phase?

In the analysis of a normal adult gait cycle at a standard walking speed, the cycle is classically divided into the stance phase and the swing phase. What percentage of the total gait cycle is typically occupied by each phase?

During the normal gait cycle, weakness of which muscle group and during which specific phase results in a classic 'foot slap'?

During the single-leg stance phase of normal walking gait, the hip joint reaction force is approximately what multiple of total body weight?

Which of the following muscles is considered the primary driver of limb advancement during the initial swing phase of the normal gait cycle?

During a normal human walking gait cycle at a standard pace, what percentage of the entire gait cycle is spent in double-limb support?

During a normal gait cycle, the ankle joint transitions through varying degrees of dorsiflexion and plantarflexion. At which specific point in the gait cycle does maximal ankle dorsiflexion occur?

A patient exhibits a positive Trendelenburg sign on the right side. During the stance phase of gait on the right leg, what compensatory movement is typically observed to maintain stability?

A patient with a dense common peroneal nerve palsy presents with a 'steppage' gait. During which phase of the gait cycle is the primary compensation (excessive hip and knee flexion) observed?

A 65-year-old patient with severe hip abductor weakness demonstrates a compensated Trendelenburg gait. Which of the following biomechanical adaptations is characteristic during the stance phase of the affected limb?

During the normal human gait cycle, which muscle acts eccentrically to control the transition from initial contact to foot flat (the first rocker)?

According to Saunders' classic determinants of gait, which of the following kinematic mechanisms is primarily responsible for minimizing the vertical displacement of the center of gravity during the stance phase?

During the stance phase of gait, a patient demonstrates a pronounced lateral trunk lean towards the side of the supporting limb (gluteus medius lurch). This specific kinematic adaptation most effectively achieves which of the following biomechanical goals?

During normal human walking, the vertical ground reaction force (vGRF) curve typically exhibits a characteristic "double-hump" pattern. The two peaks of this curve correspond precisely to which events in the normal gait cycle?

A 65-year-old female with severe unilateral hip osteoarthritis exhibits a pronounced Trendelenburg gait. Biomechanically, how does the observed lateral trunk shift during the stance phase of the affected limb alter the forces acting on the hip joint?

A patient presents with a Trendelenburg gait due to severe hip abductor weakness. During the stance phase of the affected limb, what is the primary biomechanical purpose of the compensatory lateral trunk shift?

During the loading response phase of a normal gait cycle, what is the primary role of the quadriceps muscle group?

According to the determinants of normal gait, which of the following kinematic mechanisms is most responsible for minimizing the superior vertical excursion of the body's center of mass during mid-stance?

A patient recovering from a traumatic brain injury walks with a 'stiff-knee' gait, characterized by significantly diminished knee flexion during the swing phase. Overactivity of which muscle is the most common etiology of this specific gait abnormality?

A patient with a history of poliomyelitis walks with a forward lean of the trunk during the early stance phase of gait. Which underlying muscular deficit is this compensatory mechanism attempting to overcome?