Movement Analysis and Biomechanical Principles Flashcards Preview

PT 506 Kinesiology > Movement Analysis and Biomechanical Principles > Flashcards

Flashcards in Movement Analysis and Biomechanical Principles Deck (38):
1

Kinematic Analysis

Describes the movement, but does not deal with forces

2

Kinetic Analysis

Analysis of force required

3

Kinematic Variables

Location of the movement
Direction of the movement
Magnitude of the motion
Rate or duration of motion

4

Types of motion/displacement

Rotary
Translatory (linear)
Gliding/Sliding
Curvilinear

5

Rotary (Angular) Motion

Movement around a fixed axis in a curved path
Each point on the object moves through the same angle at the same time at a constant distance from the axis of rotation

6

Translatory (Linear) Motion

Movement in a straight line
Each point moves through the same distance, at the same time, in parallel paths

7

Gliding/Sliding

Accessory motion/Arthrokinematics
Another form of translation

8

Curvilinear Motion

When an object rotates about an axis and moves through space at the same time.
EX: Thrown ball/Cup rotating towards mouth and being picked up

9

3 Cardinal Planes

Horizontal
Coronal
Saggital

10

Moment

Potential Torque

11

Osteokinematic Motion

Levers that are moving

12

Magnitude of Motion

Measured in degrees or Radians (isokinetics)

13

Angular Speed

Degrees per second

14

Velocity

Distance divided by time in a given direction

15

Speed

Velocity without direction

16

Kinetics

Tell us why motion is occurring
Study of forces

17

Force

Push or Pull

18

External force

Gravity/Friction/Drag/etc

19

Internal Force

Muscular Contraction/Friction/etc

20

Force Vectors

Point of application
Action line/line of action
Magnitude

21

Point of application

Where the force is applied

22

Line of Action

Direction and angle of the force

23

Weight

Mass X Acceleration

24

Stability

Firmness of balance
The ability to resist a disturbing force

25

Balance Depends On

Strength
Quickness
Proprioception

26

Factors affecting stability

Body Weight
Frictional characteristics of the surfaces
Base of support

27

Relationship between velocity and stability

Increased Velocity=Increased stability
When perterbation is in direction of motion

28

Newton's First Law

Law of inertia: An object will remain at rest or in motion unless acted on by an unbalanced force

29

Inertia

Property of an object to resist both the initiatino of motion and change in motion

30

Newton's Second Law

Law of Acceleration
a=F/m
Acceleration of an object is proportional to the unbalanced forces acting on it and inversely proportional to the mass of the object

31

Newton's Third Law

Law of Reaction
For every action there is an equal and opposite reaction

32

Interaction Pair

Points of application are on different objects

33

Momentum

Quantity of motion possessed by a body
Momentum=mass x velocity

34

Torque

Force x Distance`

35

First Class Lever

Axis of rotation between EA and RA
MA=1

36

Second Class lever

Axis of rotation, RA, EA
Eccentric at most joints
Favors power
MA > 1

37

Third Class Lever

Axis of rotation, EA, RA
Concentric at most joints
Favors speed and ROM
MA < 1

38

Mechanical Advantage

Indicator of efficiency
MA=EA/RA