Occupational Therapist Test Biomechanics and Kinesiology 2

Question 1

During normal gait, the stance phase constitutes approximately what percentage of the gait cycle?

Accepted Answer

60%

Answer

The stance phase, when the foot is in contact with the ground, comprises approximately 60% of the gait cycle, while swing phase accounts for 40%.

Question 2

Torque is calculated as the product of force and:

Accepted Answer

The perpendicular distance from the axis of rotation (moment arm)

Answer

Torque equals force multiplied by the perpendicular distance from the line of force to the axis of rotation (moment arm), determining rotational effect at a joint.

Question 3

The rotator cuff muscles serve which primary biomechanical function at the shoulder?

Accepted Answer

Dynamic stabilization of the humeral head within the glenoid fossa

Answer

The rotator cuff muscles (supraspinatus, infraspinatus, teres minor, subscapularis) compress the humeral head into the glenoid, providing dynamic glenohumeral joint stability during movement.

Question 4

In spinal biomechanics, the nucleus pulposus of an intervertebral disc functions primarily as:

Accepted Answer

A hydraulic shock absorber that distributes compressive forces

Answer

The gelatinous nucleus pulposus acts as a hydrostatic shock absorber, redistributing compressive loads uniformly across the annulus fibrosus and vertebral end plates.

Question 5

In a healthy standing adult, the center of gravity is typically located:

Accepted Answer

Anterior to the S2 vertebra

Answer

The center of gravity in a standing adult is located approximately anterior to the S2 vertebra, roughly 55–57% of standing height from the floor.

Occupational Therapist Test Practice Test

Occupational Therapist Test Practice Test

Occupational Therapist Test Biomechanics and Kinesiology 2