PAS Biomechanical Analysis & Movement 2

Question 1

Which plane of motion does a lateral trunk bend (side flexion) primarily occur in?

Accepted Answer

Frontal plane

Answer

Lateral trunk flexion occurs in the frontal (coronal) plane, dividing the body into front and back halves.

Question 2

The center of gravity in a standing adult is typically located at approximately what vertebral level?

Accepted Answer

S2

Answer

The center of gravity in a typical standing adult is located just anterior to the second sacral segment (S2).

Question 3

Which term describes the rotational force produced by a muscle acting at a joint?

Accepted Answer

Torque

Answer

Torque is the rotational force a muscle generates about a joint axis, calculated as force multiplied by the moment arm.

Question 4

During gait, which phase involves the foot making initial contact with the ground?

Accepted Answer

Initial contact

Answer

Initial contact is the very beginning of the stance phase when the heel (or foot) first touches the ground.

Question 5

Excessive anterior pelvic tilt is most commonly associated with tightness in which muscle group?

Accepted Answer

Hip flexors

Answer

Tight hip flexors (iliopsoas) pull the anterior pelvis downward, causing an anterior pelvic tilt and increased lumbar lordosis.

(PAS) Postural Alignment Specialist Practice Test