Muscles of Head & Face

Question 1

Origin

Answer 1

•more stable attachment

where the movement homes to

Question 2

Insertion

Answer 2

• more moveable attachment

blue

Question 3

Action

Answer 3

main movement when muscle contracts

Question 4

Reverse Muscle Action (RMA)

Answer 4

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

Question 5

Lever

Answer 5

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

Question 6

Fulcrum

Answer 6

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

Question 7

Effort

Answer 7

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

Question 8

Load or resistance

Answer 8

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

Question 9

Fusiform

Answer 9

•fascicles nearly parallel with narrower tendons on either end

Question 10

Pennate

Answer 10

•short fascicles with various arrangements to the tendon

Question 11

Prime Mover / Agonist

Answer 11

•muscle which contracts to cause the action

Question 12

Antagonist

Answer 12

•muscle on opposite side that stretches

Question 13

Synergists

Answer 13

•muscles that assist the prime mover in creating an action

Question 14

Fixators

Answer 14

• muscles that stabilize the origin of the prime mover

Question 15

Compartment

Answer 15

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

Question 16

how are skeletal muscles named

Answer 16

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