(S1W3) Electromyography (EMG) part 1

Question 1

What moves a neuron’s resting membrane potential closer to threshold?

Answer 1

depolarisation

Question 2

What carries sensory information from the muscle spindle to the spinal cord?

Answer 2

1a affferent neurons

Question 3

A Golgi tendon organ is sensitive to . . .

Answer 3

tension

Question 4

Why do we split reaction time into premotor reaction time and motor reaction time?

Answer 4

• so we can look at how long it takes the signals to get processed by the CNS and actually reach the muscle prior to measuring that muscle excitation

Question 5

What is motor reaction time?

Answer 5

• time from detecting the muscle excitation and action potential to the first visible response

Question 6

What is premotor reaction time?

Answer 6

• time from presentation of stimulus to appearance of increased muscle firing (on EMG)