week 2-1

Question 1

what is the size principle

Answer 1

Motor units recruited from smallest to largest
S-FR-FLnt-FF

Question 2

functional consequences

Answer 2

Simplifies the task of modulating force not necessary for higher centres to select specific combinations of MUs
- this ensures a smooth increase in force production

Question 3

fast contractions

Answer 3

-slow versus fast contraction
-order across motor units remain consistent
-recruitment threshold can change within a motor unit

Question 4

what does firing rate match

Answer 4

contractile speed

Question 5

how to achieve a smooth net force

Answer 5

partially fused tetanus (asynchronously)

Question 6

EMG

Answer 6

recording of the electrical activity from muscle

Question 7

MU is the gate keeper of

Answer 7

movements

Question 8

as forces increases

Answer 8

action potential rate increases

Question 9

twitch

Answer 9

is the physiological quntal response of a motor unit to stimulation

Question 10

fast fatiguable need

Answer 10

high frequencies to reach there max

Question 11

the largest the MU the larger

Answer 11

the synaptic input you need to get it to fire