- 96 Views
- Uploaded on
- Presentation posted in: General

Basic Kinematics

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Basic Kinematics

- Introduction to the Course
- Biomechanical Concepts Related to Human Movement
- Anatomical Concepts Related to Human Movement
- Applications in Human Movement

- Introduction to the Course
- Biomechanical Concepts Related to Human Movement
- Anatomical Concepts Related to Human Movement
- Applications in Human Movement

- Basic Kinematic Concepts
- Vector Algebra
- Basic Kinetic Concepts

- Basic Kinematic Concepts
- Vector Algebra
- Basic Kinetic Concepts

- Variables for Describing Motion
- Reference Systems for Describing Motion of the Human Body and Its Segments
- Guidelines for Describing Motion of the Human Body and Its Segments

- Spatial and temporal characteristics
- Qualitative or quantitative
- Linear & angular motion

- 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

- Variables for Describing Motion
- Reference Systems for Describing Motion of the Human Body & Its Segments
- Guidelines for Describing Motion of the Human Body & Its Segments

- Time
- Position
- Displacement & distance
- Velocity & speed
- Acceleration

WHEN?

HOW OFTEN?

IN WHAT ORDER?

HOW LONG?

Most basic analysis

Examples:

Cadence

Stride time

Temporal patterning

Stance

Swing

- position - location in space relative to some reference point
- Linear position (s)
- x,y,z coordinates

- Angular position ()
- Units

WHERE?

Displacement (s, )

Final change in position

Vector quantity

Distance (p, )

Sum of all changes in position

Scalar quantity

HOW FAR?

- Units (m, °)

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 QUICKLY IS VELOCITY CHANGING?

HOW FAST?

- Types of Motion
- Variables for Describing Motion
- Reference Systems for Describing Motion of the Human Body & Its Segments
- Guidelines for Describing Motion of the Human Body & Its Segments

+y

vertical

horizontal

-x

+x

Must define origin of reference system to quantify kinematics.

horizontal

+z

-y

90°

180°

0°

270°

/2 rad

¼ rev

CCW +

- rad
½ rev

2 rad

1 rev

3/2 rad

¾ rev

- All Joints @ 0except
- Ankle @ 90
- Forearm varies

Fundamental

Standing

Position

Anatomical

Standing

Position

90

140

140

0

0

40

90

0

90

- Types of Motion
- Variables for Describing Motion
- Reference Systems for Describing Motion of the Human Body & Its Segments
- Guidelines for Describing Motion of the Human Body & Its Segments

A

B

- Identify the system of interest
- Identify the type(s) of motion of interest
- Identify the reference system for the motion
- Describe precisely the temporal & spatial characteristics of that motion using appropriate terminology for the situation
- Time
- Position
- Displacement (ROM)
- Velocity
- Acceleration

- Lecture Topic #2
- Subtopic C – Vector Algebra