Mechanics Of Muscle Movement

Front 1

# of Points of attachment

Back 1

Muscles have 2 or more points of attachments to the skeleton

Front 2

Tendon

Back 2

Connects Ms to bone at each end

Front 3

Tendon structure

Back 3

connective tissue from the MS forms the tendon and connects to the periosteum of the bone

Front 4

Origin MS end

Back 4

The less movable part of the MS

Front 5

Insertion MS end

Back 5

MS attachment on the part of the body that moves
MORE MOVABLE end

Front 6

Agonist

Back 6

-(prime mover) perform joint motion through a specific plane
-These perform the movement
-There can be more than 1 agonist

Front 7

Antagonist

Back 7

-Produces opposit move from Agonist. It relaxes as agonist contracts
-Roles can flip flop

Front 8

Stabilizers

Back 8

(Fixators)MS that surround a body part and contract to fixate/stabilize the body part to enable another area to move

Front 9

Synergist

Back 9

-assists the agonist: guide refined movements; rule out unwanted movements
-NOT an agonist

Front 10

Intrinsic

Back 10

MS found within the body part on which they acts
Hand MS are a good example

Front 11

Extrinsic

Back 11

The proximal MS origin is outside
ex: wrist extension MS found on the humerus