Shared Flashcard Set

Details

Lab2
Muscle movers
13
Anatomy
Undergraduate 2
06/15/2011

Additional Anatomy Flashcards

 


 

Cards

Term
Define origin
Definition
origin is the non-moving point of attachment when a muscle contracts.
Term
Define insertion
Definition
insertion moves toward the point of origin
Term
Define Lever
Definition
A lever is a fixed structure that can move around a fixed point.  The lever is acted on at two different points by two different forces: the effort and the load.
Term
Define Fulcrum (axis)
Definition
The point or support on which a lever turns. The position of the fulcrum, relative to the positions of the load and effort, determines the type of lever.
Term
First class lever
Definition
 first-class lever, with fulcrum between load and effort, as in a crowbar;
Term
second class lever
Definition
 second-class lever, with load between fulcrum and effort, as in a wheelbarrow;
Term
third class lever  
Definition

 third-class lever, with effort between fulcrum and load, as in a person's forearm, where the fulcrum is the elbow and the load is something held in the hand.



Term
Define lever systems
Definition
Bones act as levers, joints function as fulcrums of these levers.
Term
Define load or resistance
Definition
load or resistance is that which opposes movement
Term
Prime mover
Definition
muscle that is responsible for an action
Term
Define Antagonist
Definition
Performs opposite action of prime mover, opposite side of body.
Term
Define Fixator
Definition
Fixator - who's action helps hold a particular position or stablize a body part. i.e., don't let wrist fold over while flexing fingers.
Term
7 criteria that are used to name skeletal muscles.
Definition
1. location of the muscle, 2. shape of the muscle, 3. relative size of the muscle, 4. direction of muscle fibers, 5. number of origins, 6. location of the attachments, 7. action
Supporting users have an ad free experience!