Study Motion/Movement Flash Cards

 
Pile Management Card
Motion/Movement

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Property of a material demonstrated by it's ability to return to it's original length after the removal of deforming force?
VISCOELASTICITY
Property of a material expressed by a changing stress-strain relationship over time?
ELASTICITY
Branch of mechanics that describes the effects of forces on the body?
KINETICS
RElative moment arm length possessed by a particular force?
LEVERAGE
Quantity such as a force that is completely specified by it's magnitude and direction?
VECTOR
Application of a single force of sufficient magnitude to cause injury to a biological tissue?
ACUTE LOADING
Repeated application of a subacute load that is usually of relatively low magnitude?
REPETITIVE LOADING
Failure?
LOSS OF MECHANICAL CONTINUITY
Point on the load-deformation curve past which deformation is permanent?
YIELD POINT
Deformation?
CHANGE IN SHAPE
Load producing twisting of a body around it's longidudinal axis?
TORSION
Asymetric loading that produces tension on one side of a body's longitudinal axis and compresion on the other side?
BENDING
Distribution of force within a body, quantified as force divided by the area over which the force acts?
STRESS
Pressing or squeezing force directly axially through a body?
COMPRESSION
Force directed parallel to a surface?
SHEAR
Pulling of stretching axially through a body?
TENSION
Component lies parallel to the lever?
TRANSLATORY
Portion of force applied perpindicular to the lever?
ROTATORY COMPONENT
What lever systems are most prominent in the body?
3RD CLASS LEVER SYSTEMS
What lever system is least effective?
3RD CLASS
What lever system is most effective?
2ND CLASS
What is the formula for mechanical advantage?
M AD = EA/RA
When torques applied to lever systems are equal, the system is said to be in?
EQUILIBRIUM
Torque is also known as?
MOMENT OF FORCE
Is a product of magnitude of the applied force and the distance that lies from the axis of rotation?
TORQUE
True/False

Joints that have arthritis have pain with activities that produce high shear forces?
TRUE
Force that moves or attemps to omve one object on another?
SHEAR FORCE
Occurs when two object come in contact with one another?
FRICTION
True/False

Articular cartliage has an extensive nerve supply?
FALSE

ARTICULAR CARTILAGE HAS NO NERVE SUPPLY
How much water is in articular cartilage?
80%
True/False

COG doesn't have to fall within the object itself?
TRUE
Relocation of the COG is important with motion?
TRUE
True/False

Stability and COG is important for motion?
FALSE

IMPORTANT FOR BALANCE
Where does the center of gravity in the human body lie?
S2
A hypothetical point at which all mass would appear to be concentrated and is the point at which the force of gravity appears to act?
CENTER OF GRAVITY
Torque=
PERPINDICULAR DISTANCE X FORCE
Force vectors can be defined as what?
-A POINT OF APPLICATION
-AN ACTION LINE AND DIRECTION WHICH INDICATES A PULL TOWARD THE SOURCE OR A PUSH AWAY FROM THE SOURCE
-MAGNITUDE OR QUANTITY OF FORCE BEING EXERTED
Force?
A PUSH OR PULL EXERTED BY ONE MATERIAL OBJECT ON ANOTHER
Lengthening over a period of time is called what?
CREEP
What are some example of non contractile tissues?
-LIGAMENTS
-TENDONS
-BONES
-BURSA
Ligaments which have more elastin then bones will ahve a different____________ curve then bone?
STRESS STRAINS
Applies a stress, but returns to original length?
ELASTIC ZONE
Applied enough stress for a new length in that tissue?
PLASTIC ZONE
What describes Arthrokinematics?
-ROLL
-SPIN
-GLIDE
Describes the motion that occurs between the articular surfaces of joints?
ARTHROKINEMATICS
The distal segment is in a weight bearing position?
CLOSED KINETIC CHAIN
The distal segment is not in a weight bearing position?
OPEN KINETIC CHAIN
Motion that describes movement between bones?
OSTEOKINEMATICS
Occurs when one bone moves parallel to the flat articular surface of a contiguous bone?
GLIDING
Straight line?
RECTILINEAR
Occurs when an object rotates about an axis and moves through space at the same time?
CURVILLINEAR
What is an example of Translation?
WALKING
Linear motion in which all parts of a rigid body move parallel to and in the same direction as every other part of the body?
TRANSLATION
Concerned with the forces producing motion or maintaining equilibrium?
KINETICS
Description of motion irregardless for the forces producing the motion?
KINEMATICS
What are the two sub groups of biomechanics?
-KINEMATICS
-KINETICS
The study of mechanics in the human body?
BIOMECHANICS
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