Basic Kinematics. Course Content I.Introduction to the Course II.Biomechanical Concepts Related to Human Movement III.Anatomical Concepts Related to Human

  • Published on
    31-Mar-2015

  • View
    212

  • Download
    0

Embed Size (px)

Transcript

<ul><li>Slide 1</li></ul> <p>Basic Kinematics Slide 2 Course Content I.Introduction to the Course II.Biomechanical Concepts Related to Human Movement III.Anatomical Concepts Related to Human Movement IV.Applications in Human Movement Slide 3 Course Content I.Introduction to the Course II.Biomechanical Concepts Related to Human Movement III.Anatomical Concepts Related to Human Movement IV.Applications in Human Movement Slide 4 Biomechanical Concepts A.Basic Kinematic Concepts B.Vector Algebra C.Basic Kinetic Concepts Slide 5 Biomechanical Concepts A.Basic Kinematic Concepts B.Vector Algebra C.Basic Kinetic Concepts Slide 6 Basic Kinematic Concepts 1.Variables for Describing Motion 2.Reference Systems for Describing Motion of the Human Body and Its Segments 3.Guidelines for Describing Motion of the Human Body and Its Segments Slide 7 Rigid Body Mechanics Rigid Body Mechanics Statics Constant Velocity KinematicsKinetics Motionless Dynamics KinematicsKinetics Slide 8 What is kinematics? Spatial and temporal characteristics Qualitative or quantitative Linear &amp; angular motion Slide 9 Why use kinematics? Practical: Provides a standard for us in performing, teaching, or evaluating a skill Research: Once we describe, we can ask why? Problem with kinematics? Practical: Proper kinematics does not always mean proper force application Slide 10 Basic Kinematic Concepts 1.Variables for Describing Motion 2.Reference Systems for Describing Motion of the Human Body &amp; Its Segments 3.Guidelines for Describing Motion of the Human Body &amp; Its Segments Slide 11 Kinematic Variables Time Position Displacement &amp; distance Velocity &amp; speed Acceleration Slide 12 Time Temporal Analysis WHEN? HOW OFTEN? IN WHAT ORDER? HOW LONG? Most basic analysis Examples: Cadence Stride time Temporal patterning Slide 13 Temporal Patterning Slide 14 Stance Swing Slide 15 Absolute vs. Relative Timing Slide 16 Position position - location in space relative to some reference point Linear position (s) x,y,z coordinates Angular position ( ) Units WHERE? Slide 17 Displacement &amp; Distance Displacement ( s, ) Final change in position Vector quantity Distance ( p, ) Sum of all changes in position Scalar quantity HOW FAR? yUnits (m, ) Slide 18 Velocity &amp; Acceleration Velocity (v, ) Vector quantity position time Units (m. s -1, . s -1 ) Acceleration (a, ) Vector quantity velocity time Units (m. s -2, . s -2 ) Insight into forces/torques HOW FAST? HOW QUICKLY IS VELOCITY CHANGING? Slide 19 Basic Kinematic Concepts 1.Types of Motion 2.Variables for Describing Motion 3.Reference Systems for Describing Motion of the Human Body &amp; Its Segments 4.Guidelines for Describing Motion of the Human Body &amp; Its Segments Slide 20 Reference Systems: Linear +x -x -y +y +z horizontal vertical horizontal Must define origin of reference system to quantify kinematics. Slide 21 00 90 180 270 rad rev 3 /2 rad rev /2 rad rev 2 rad 1 rev Absolute Reference Systems: Angular CCW + Slide 22 Relative Reference Systems: Angular Slide 23 Relative Reference Systems Fundamental Standing Position Anatomical Standing Position All Joints @ 0 except Ankle @ 90 Forearm varies Slide 24 Reference Systems for Measuring Joint Position &amp; Displacement 00 90 140 Slide 25 00 00 40 90 Slide 26 Basic Kinematic Concepts 1.Types of Motion 2.Variables for Describing Motion 3.Reference Systems for Describing Motion of the Human Body &amp; Its Segments 4.Guidelines for Describing Motion of the Human Body &amp; Its Segments Slide 27 1. Distinguish between motion &amp; position of joints &amp; segments. AB Slide 28 2. Recognize that either segment can rotate about a joint. Slide 29 3. Recognize that bones move linearly as well as angularly. Slide 30 4. Understand that movement generally occurs in oblique planes around oblique axes. Slide 31 5. When observing motion, look at the plane, down the axis. Slide 32 Summary 1.Identify the system of interest 2.Identify the type(s) of motion of interest 3.Identify the reference system for the motion 4.Describe precisely the temporal &amp; spatial characteristics of that motion using appropriate terminology for the situation Time Position Displacement (ROM) Velocity Acceleration Slide 33 For the next lecture day: Lecture Topic #2 Subtopic C Vector Algebra </p>

Recommended

View more >