Levers, Planes and Axes Flashcards
Which class of lever is the Diagram?
1st Class
Fulcrum is in the middle
During Plantarflexion of the ankle, what class of lever is being used?
2nd Class
Resistance is in the middle
What does a third Class lever look like?
How do you work out mechanical advantage?
Effort arm / resistance arm
What is the benefit of a lever system of having a short effort arm?
Gives rapid movements over a large range of movement
What is the benefit of a lever system of having a short resistance arm?
Able to move a heavy weight
Complete this:
1 F T/Neck
2 _ G
_ E _
1 F TRICEP/NECK
2 L GASTROCNEIMUS
3 E BICEP/ANY OTHER MUSCLE
What do you understand by the term ‘Antagonistic muscle action’
As one muscle contracts the second relaxes
Define Isotonic muscle contraction
Muscle action where the muscle changes length - causing movement
Define Isometric muscle contraction
Muscle action where the muscle stays the same length - used in balances e.g. the plank/headstand
Define concentric muscle contraction
Isotonic muscle contraction where the muscle shortens
Define eccentric muscle contraction
Isotonic contraction where the muscle lengthens - used to control downward movements
Which plane is this?
Sagittal
What does the Transverse plane divide the body into?
Top and Bottom
Which plane is this?
Frontal