Muscles of Head & Face Flashcards Preview

Anatomy & Physiology - Kuntzman > Muscles of Head & Face > Flashcards

Flashcards in Muscles of Head & Face Deck (16)
1

 Origin

•more stable attachment

where the movement homes to 

2

Insertion

• more moveable attachment

blue

3

Action

main movement when muscle contracts

4

 Reverse Muscle Action (RMA)

•action of muscle when insertion tendon is stabilized and origin tendon creates a pull on the bone

5

Lever

•a rigid structure that can move around a fixed point; bones act as levers

6

Fulcrum

•the support around which a lever pivots; joints act as the fulcrum

7

 Effort

•energy or force to cause movement (contraction of muscle)

8

Load or resistance

•weight that is carried or supported; force that opposes movement

9

Fusiform

•fascicles nearly parallel with narrower tendons on either end

10

Pennate

•short fascicles with various arrangements to the tendon

11

Prime Mover / Agonist

•muscle which contracts to cause the action

12

Antagonist

•muscle on opposite side that stretches

13

Synergists

•muscles that assist the prime mover in creating an action

14

Fixators

• muscles that stabilize the origin of the prime mover

15

Compartment

•group of muscles with their nerves and blood vessels that  have a common function

16

how are skeletal muscles named

  • direction
  • size
  • shape
  • action
  • number of origins
  • location of muscle
  • location of origin and insertion