Introduction to Biomechanics

9/5/2000

 

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Table of Contents

Introduction to Biomechanics

Biomechanical Analysis of
Movement

Cause and Effect

Kinematics
the geometry of motion

Motion Analysis

PPT Slide

Motion Analysis
Space and Time

Motion Analysis

Motion Analysis

Temporal Analysis

Temporal Analysis
Application: Locomotion

Temporal Analysis
Left Front Paw Contact (LFPC) to
next Left Front Paw Contact

PPT Slide


Representation of a system of interest as a single point

 Center of Mass

Total Body Center of Mass (TBCM)

Total Body Center of Mass

PPT Slide

Body Segment Parameters
Define Segment End points, Segment Mass,
Segment CM, and Moments of Inertia

PPT Slide

PPT Slide

Cause and Effect

Free Body Diagram

Mass Acceleration Diagram

Free Body Diagram =
Mass Acceleration Diagram

Analysis of a
Multiple Link System

beyond the
total body center of mass
(TBCM)

Linear Position
qualitative

Linear Position
quantitative analysis

Locomotion

Temporal Analysis
Left Front Paw to Left Front Paw

Linear Displacement

Linear Displacement of LFP

Average Linear Velocity of LFP

Angular Position
global reference system

Angular Position
anatomical reference system

Angular
Displacement

PPT Slide

Average Angular Velocity

PPT Slide

Angular
Displacement

Projectile Motion
special case

High Jumper

Projectile Motion
 special case

Projectile Motion
 special case

Flight Phase
with air resistance
FBD MAD

Tennis Player

FBD MAD

Gymnastics

FBD MAD

Ergonomics

FBD MAD

Projectile Motion

Projectile Motion

Projectile Motion
special case

Free Body Diagram
 special case

Mass Acceleration Diagram
 special case

Projectile Motion
Position

Projectile Motion

Projectile Motion

Projectile Motion

Projectile Motion

Projectile Motion
Vertical Velocity

Projectile Motion

Total BodyKinetics

What Causes a Change in
 Total Body Momentum?

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More Than One Way to Achieve Change in Total Body Momentum

PPT Slide

PPT Slide

PPT Slide

Orientation of TBCM
Relative to the Ankle

Joint Kinetics

Joint Kinetics
free weights

Joint Kinetics
pulley system

Joint Kinetics
free weights
FBD MAD

Joint Kinetics
pulley system
FBD MAD

Joint Kinetics
free weight
FBD MAD

Joint Kinetics
pulley system
FBD MAD

Segment Angle Relative to Reaction Forces
Influences Mechanical Demand

Muscle Forces*

Net Joint Moments Achieved with Different Muscle Activation Patterns

Relationship Between
Linear and Angular Motion

Relationship Between
Linear and Angular Motion

Relationship Between
Linear and Angular Motion

Relationship Between
Linear and Angular Motion

Author: Jill McNitt-Gray

Email: kcosta@usc.edu

Home Page: www.usc.edu/dept/LAS/kinesiology/exsc408l/index.html