Event 1 Event 2 Event 3 .2 .6 a) Place a+ where the cursor should go, and an \"M

Question

Event 1 Event 2 Event 3 .2 .6 a) Place a+ where the cursor should go, and an "M" where the M marker should go, to measure the amplitude (height) of the peak in recording event l Make sure to place the cursor and M marker in such a way that your answer won't be negative! (2 pts). b) What is the approximate amplitude in mV of the twitch in recording event 2? Be careful and note the position of the baseline! (2 pts) c) The scale along the x axis is time in seconds. Place a where the cursor should go, and an "M" where the M marker should go, to measure the time between the first two twitches in recording event 3. (2 pts) d) How far apart are the twitches in the third recording event? (2 pts) e) What is the twitch frequency? Use the formula in your lab manual that relates frequency in Hertz with duration to calculate this (2 pts)

Explanation / Answer

a) Setting our baseline as zero, our a+ will be on the base of the peak at zero and marker M at the tip in recording event 1. so our amplitude comes to be +1 ( neglecting the negative base line)

b) The approximate amplitude will also be +1 mv if we fix zero as our base line

c) In recording event 3, to measure the time between two twitches the cursor a+ will go exactly at the center of the twitch and marker M will be on the same line touching x axis. So our first twitch in the recording event 3 will lie exactly at 1 on the x axis. Similarly our second twitch will lie approximately at 3. So the time between the first two twitches will be 3-1 = 2 seconds

d) The twitches in the recording event 3 are exactly at 1, 3 and 5 seconds. So they are 5-3=2, 3-1= 2,

5-1=4 i.e. all the twitches are 2 second away from each other and the distance between first and third twitch is 4 seconds

e) Frequency, f = 1/T, where T is time so in this case f will be 1/2 which equals 0.5 Hz

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