Chapter 2 - Kinematic Concepts for Analyzing Human Motion

General Motion

Motion involving translation and rotation simultaneously. Most human movement is this type of motion

Linear Motion

Motion of a system, with all parts moving in the same direction and at the same speed.

translation

Linear Motion is also referred to as what?

Angular Motion

Motion involving rotation about a central imaginary line known as the axis of rotation

Rotation

Angular Motion is also referred to as what?

Rectilinear

Term for “along a straight line”

Curvilinear

Term for “Along a curved line”

Axis of Rotation

Imaginary line perpendicular to the plan of rotation and passing through the center of rotation

System

Object or group of objects chosen by the analyst for study

Face straight forward, arm at sides, palms forward, toes forward.

Key components of anatomical position (face, arm, palm, and toe positions)

Sagittal Plane

Plane in which forward and backward movements of the body and body segments occur

Frontal Plant

Plane in which lateral movements of the body and body segments occur

Transverse Plane

Plane in which horizontal body and body segment movements occur when the body is in an erect position

Frontal Axis

Imaginary line passing through the body from side to side and around which sagittal plan rotations occur

Sagittal Axis

Imaginary line passing from front to back through the body and around which frontal plan rotations occur

Longitudinal Axis

Imaginary line passing from top to bottom through the body and around which transverse plan rotations occur