Component 01 - Levers, Planes and Axes

Question 1

What are the three different classes of lever?

Answer 1

1st, 2nd and 3rd class

Question 2

What are the three components of a lever?

Answer 2

Fulcrum, Load, Effort

Question 3

How do you work out which class a lever is?

Answer 3

Whichever component is in the middle of the system. Eg if the fulcrum is in the middle, it is 1st class (Remember 1, 2, 3 - F, L, E).

Question 4

If the load is in the middle, what class of lever is it?

Answer 4

2nd class

Question 5

If the effort is in the middle, what class of lever is it?

Answer 5

3rd class

Question 6

Where are there 1st class levers in the body?

Answer 6

Neck - Atlas and Axis

Elbow - when the triceps are the agonist

Question 7

What are the 2nd class levers in the body?

Answer 7

At the ankle when the gastrocnemius is the agonist.

Question 8

What are the 3rd class levers in the body?

Answer 8

At the ankle when the tibialis anterior is the agonist.

At the elbow when the biceps is the agonist (This system has MECHANICAL ADVANTAGE)

Question 9

Which movements can take place in the sagittal plane?

Answer 9

Flexion and Extension

Question 10

Which movements can take place in the frontal plane?

Answer 10

Abduction and adduction

Question 11

Which movements can take place in the transverse plane?

Answer 11

Horizontal flexion and extension

Question 12

Which plane runs in front and behind (divides into left and right)?

Answer 12

Sagittal

Question 13

Which plane splits the body into top and bottom, running horizontally?

Answer 13

Transverse

Question 14

Which plane splits the body into front and back?

Answer 14

Frontal

Question 15

Which axis runs through the belly button and out your back?

Answer 15

Sagittal

Question 16

Which axis runs from head to toe?

Answer 16

Vertical

Question 17

Which axis runs through the hips?

Answer 17

Frontal