Muscular System Flashcards Preview

Functional Anatomy I > Muscular System > Flashcards

Flashcards in Muscular System Deck (33)
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1

Insertion

more movable bone

2

Origin

More stable bone

3

What do muscle names tell us?

- Location
- Shape
- Action
- Number of heads/divisions
- Attachments = origin/insertion
- Direction of fibers
- Size of muscles

4

Parallel muscle

fibers tend to be longer & have greater ROM potential

5

Oblique muscles

fibers tend to be shorter, but more numerous

6

Strap muscles

long and think with fibers running the entire length of the muscle

7

Fusiform muscles

shape similar to a spindle -- wider in the middle and tapers at both ends

8

Rhomboidal muscle

4 sided, usually flat with broad attachments at each end

9

Triangular muscle

flat & fan shaped, with fibers radiating from a narrow attachment at one end to a broad attachment at another

10

Unipennate muscle

one side of a feather

11

Bipennate muscle

looks like a normal feather

12

Mulitpennate muscle

many tendons with oblique fibers in between

13

Normal resting length

length of a muscle when it is unstimulated

14

Irritability

ability to respond to a stimulus

15

Contractility

muscles ability to shorten or contact when it receives adequate stimulation

16

Extensibility

muscles ability to stretch or lengthen when force is applied

17

Elasticity

muscles ability to recoil or return to normal resting length when the stretching or shortening force is removed

18

Tension

force built up within a muscle

19

Excursion

distance fro maximum elongation to maximum shortening

20

Active insufficiency

muscle cannot shorten any further

21

Passive insufficiency

muscle cannot be elongated any further

22

Isometric Contraction

muscle contracts, but no movement in the joint

23

Isotonic contraction

muscle contracts, movement in the joint
2 types
concentric
eccentric

24

Concentric contraction

joint movement, muscle shortens

25

Eccentric contraction

joint movement, muscle lengthens

26

Agonist

prime mover

27

Antagonist

performs the opposite motion of the agonist

28

cocontraction

when the antagonist contracts at the same time as the agonist

29

Stabilizer

muscle or muscle group that supports, or makes firm, a part and allows the agonist to work more efficiently

30

Neutralizer

contracts to prevent unwanted motion