Shared Flashcard Set

Details

a&p
posture and gait
21
Anatomy
Not Applicable
03/27/2013

Additional Anatomy Flashcards

 


 

Cards

Term
Line of Gravity
Definition

imaginary vertical line passing through the center of gravity toward the center of the earth.

(LOG)

Term
Stable Equilibrium
Definition
occurs when an object is in a position where disturbing it would require its center of gravity to be raised.
Term
Unstable Equilibrium
Definition
occurs when only slight force is needed to disturb an object.
Term
Neutral Equalibrium
Definition
exists when an object's center of gravity remains the same.
Term
Basic Rule of Levers
Definition

A lever will favor either power/distance. The advantage gained in Power is lost in Distance. Lever is ridged and can rotate around a fixed point when force is applied.

 

Term
Axis
Definition
fixed point around which a lever can rotate (referred to as th fulcrum)
Term
Joint
Definition
is the axis
Term
Force
Definition
effort
Term
Resistance
Definition
is the load
Term
Force Arm
Definition
distance between the resistance and the axis.
Term
3 Classes of Levers
Definition
  • First Class Lever
  • Second Class Lever
  • Third Class Lever
Term
First Class Levers
Definition

Axis is located between the force and resistance.

Ex: The head moving on the neck tilting forward and backward.

Term
Second Class Lever
Definition

Resistance is in the middle with the axis at one end and force at the other end.

Advantage: what is gained in power is lost in resistance.

Ex: ankle planter flexion

Term
Third Class Lever
Definition

Has force in the middle with resistance and the axis at the opposite end.

Advantage: speed and distance

Term
Factors that change class
Definition

1. When the center of gravity of the resistance is located farther from the axis than the force.

2. When the direction of movement in relation to gravity.

Term
Pulley
Definition
Grooved wheel that turns on an axis with a rope or cable riding in the groove.
Term
Fixed Pulley
Definition
simple pulley attached to a beam.
Term
Moveable Pulley
Definition
has one end of the rope attached to the beam- rope runs through the pulley to the other end where force is applied.
Term
Mechanical Advantage
Definition
number of the times a machine multiplies the force
Term
Wheel and Axle
Definition
used to increase the force that is exerted.
Term
Inclined Plane
Definition
Ex: wheelchair accessibility- wheelchair ramp
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