Fibre Recruitment

Question 1

Describe the ALL OR NONE LAW

Answer 1

• Minimum stimulation is required
• To start a muscular contraction
• If less than threshold, no contraction

Question 2

Describe RECRUITMENT

Answer 2

• Number of motor units stimulated
• If few stimulated, less strength

Question 3

What is meant by MAXIMAL CONTRACTION

Answer 3

All motor unit being stimulated

Question 4

What is WAVE SUMMATION?

Answer 4

• Frequency of Stimuli for a motor unit
• To maintain contraction through continuous impulses

Question 5

Describe SYNCHRONISATION of MUSCLE FIBRES

Answer 5

• If all motor units are stimulated at the same time
• Maximum force is applied

Question 6

Describe TETANIC CONTRACTION

Answer 6

• Occurs when several stimuli cause contraction
• In rapid succession

Question 7

Describe how different MUSCLE FIBRES are RECRUITED during EXERCISE

Answer 7

• All intensities recruit Type 1a fibres first
• Higher intensities recruit Type 2a then 2x if needed
• Low intensity will only recruit Type 1a