Biomechanical Principles Flashcards Preview

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Flashcards in Biomechanical Principles Deck (19):
1

Degrees of freedom

number of axis of rotation x2

2

1st Class lever

Fulcrum is between effort and load (powerful)

3

Fulcrum

pivot point

4

Effort

applied force

5

Load

Resistance

6

2nd class lever

load is between fulcrum and effort (powerful)

7

3rd class lever

Effort is between fulcrum and load (speed + most common in the human body)

8

Isometric contraction

Pull equals resistance

9

Eccentric contraction

Pull is less than resistance

10

Concentric contraction

Pull exceeds resistance

11

Tone

Continuous, low level contraction

12

Passive influence

Muscles influence via elasticity without contracting

13

Active influence

Contractions and tone

14

Reflexive activity

Sensory stimulation directly influences contraction level

15

Voluntary muscle

the ability to turn muscles "on" and "off"

16

Length-tension impact with muscles

change in strength with change in length

17

Lombard's Paradox

standing up, both quads and hamstrings pull on the same pivot point, but length-tension helps us to stand up

18

Vertebrae with highest level of torsional stiffness

T12-L1, also has a high rate of spinal injury

19

Cervical coupling

Lateral flexion coupled with ipsilateral rotation