Biomechanics questions and answers
Pronation (eversion) ✔✔The position of the hand with the palm facing down. The inward
rotational roll position of the foot.
Neutral spine ✔✔The natural inward arch of the low back which distributes load equally
throughout the low back. The distribution of load helps to prevent injury and allows for efficient
movement.
Supination (inversion) ✔✔The position of the hand with the palm facing up. The outward
rotational roll position of the foot.
Anterior Tilt ✔✔An arching of the lower back that causes the pelvis to tilt towards the front of
the body.
Posterior Tilt ✔✔A rounding of the lower back that causes the pelvis to tilt towards the back of
the body.
Anatomical Directional Terminology : Anterior ✔✔In front or in front of the body
Posterior ✔✔Behind, in back, or in the rear
Prone ✔✔The body lying face downward
, Supine ✔✔Lying on the back, face upward position of the body
Midline ✔✔An imaginary external vertical line which is used as a reference line to divide the
body or body parts into left and right sections
Lateral ✔✔On or to the side, outside, farther from the median or midsagittal plane
Proximal ✔✔Nearest the trunk or the point of origin
Distal ✔✔Situated away from the center or midline of the body, or from the point of origin
Superior (Supra) ✔✔Above in relation to another structure, higher
Inferior (Infra) ✔✔Below in relation to another structure, lower
General Biomechanical Concepts: Stability ✔✔The ease at which balance is maintained. Stability
is greater when the center of gravity is closer to the ground and the support base is as wide as
possible.
Rotational inertia ✔✔Reluctance to rotate proportional to the mass and distribution of the mass
around the axis
Torque ✔✔The effect produced by a force causing rotation: the product of the force and the
length of force arm (perpendicular distance from the axis)