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Chapter 10 NEW
The Muscular System
16
Anatomy
Undergraduate 2
03/27/2009

Additional Anatomy Flashcards

 


 

Cards

Term

Interactions of Skeletal Muscles

Definition
  • skeletal muscles work together or in opposition
  • muscles pull together (NEVER push)
  • as muscles shorten, the insertion generally moves toward the origin
  • whatever a muscle (or group of muscles) does, another muscle (or group) "undoes"
Term
Origin
Definition
muscle attachment to stationary bone
Term
Insertion
Definition
muscle attachment to a more movable bone
Term
anatgonists
Definition
oppose or reverse a particular movement
Term
synergists
Definition
  • add force to movement
  • reduce undesirable or unnecessary movement

 

Term
fixators
Definition
synergists that immobilze a bone or muscle's origin
Term
Naming Skeletal Muscle
Definition
  • Location of muscle
  • shape of muscle
  • relative size of muscle
  • direction of fibers
  • number of origins
  • location of attachment
  • action
Term
location of muscle
Definition

bone or body region associated with the muscle

ex. pectoralis major, gluteus

Term
shape of muscle
Definition
ex. deltoid=triangle
Term

relative size

Definition
ex. maximus
Term
direction of fibers
Definition

rectus-fibers run straight

transverse-across

oblique-diagonal

Term
number of origins
Definition

number of sites to which it is anchored

e.g. biceps (2) tripceps (3)

Term
location of attachment
Definition
named according to point of origin or insertion
Term

action

Definition

flexor or extensor, as in the name of muscles that flex or extend, respectively

ex. flexor carpi radialis

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