Knee internal-external rotation


Knee motion


Lateral


Malleolus


Markers


Medial


Midsagittal plane



Model parameters





Moment of force









Motion capture


Motion of the medial-lateral axis of the shank with
respect to the medial-lateral axis of the thigh within
the transverse plane as viewed by an observer
positioned along the longitudinal axis of the shank.

The knee angles reflect the motion of the shank
segment relative to the thigh segment.

Away from the body's longitudinal axis, or away
from the midsagittal plane.

Broadened distal portion of the tibia and fibula
providing lateral stability to the ankle.

Active or passive objects (balls, hemispheres or
disks) aligned with respect to specific bony
landmarks used to help determine segment and joint
position in motion capture.

Toward the body's longitudinal axis, or toward the
midsagittal plane.

The plane that passes through the midline and
divides the body or body segment into the right and
left halves.

A set of coordinates that uniquely describes the
model segments lengths, joint locations, and joint
orientations, also referred to as joint parameters.
Any set of coordinates that are used to describe the
geometry of a model system.

The moment of force is calculated about a point and
is the cross product of a position vector from the
point to the line of action for the force and the force.
In two-dimensions, the moment of force about a
point is the product of a force and the perpendicular
distance from the line of action of the force to the
point. Typically, moments of force are calculated
about the center of rotation of a joint.

Interpretation of computerized data that documents
an individual's motion.