<div><font size="2">Hi all,</font></div>
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<div><font size="2">I would appreciate it if anybody has any helpful suggestions:</font></div>
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<div><font size="2">1. I am connecting a TMS Magstim Rapid2 stimulator with a pc that is running Eprime. Every time I press "save" or "run" on the Eprime software the stimulator is triggered! It is doing that with any Eprime scirpt! I don't want it to do that but instead I want the stimulator to be triggered at an output percentage value defined in Eprime, and at the specific time defined in Eprime.
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<div><font size="2">2. I need to determine Phosphenes thresholds expressed as percentages of the TMS machine output. I am quoting the procedure from a recent paper:</font></div>
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<div><font size="2"><em> "<span lang="EN-US" style="FONT-SIZE: 12pt">Phosphene thresholds were determined using a modified binary search paradigm (MOBS) that determines the upper and lower limits for the thresholds, expressed as percentages of the TMS machine output. The point midway between these limits was tested and the limits adjusted according to the subject's response. On each trial either the upper or lower limit of the range was updated depending on whether a phosphene was detected on the previous trial. If a phosphene was detected, the TMS machine value became the new upper limit. If a phosphene was not detected the TMS value was set as the lower limit. The new midpoint was then used as the test level on the next trial (For details of adjustments in cases of successive "seen" or "not seen" reports see Tyrell & Owens
<sup>)</sup>.<span> </span>The threshold was determined as being reached when the </span><span style="FONT-SIZE: 12pt">direction of the steps made by the test value had changed </span><span lang="EN-US" style="FONT-SIZE: 12pt">
five times, or when the difference between the lower and upper limits was no more than 2% of the stimulator output."</span></em></font></div>
<div><span lang="EN-US" style="FONT-SIZE: 12pt"><font size="2"></font></span> </div>
<div><span lang="EN-US" style="FONT-SIZE: 12pt"><font size="2">In the past we have done what I descipe above on oder TMS stimulators. I uploaded a file called "TMStriggerHL" in case anyone wants to take a look.
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<div><span lang="EN-US" style="FONT-SIZE: 12pt"><font size="2"></font></span> </div>
<div><span lang="EN-US" style="FONT-SIZE: 12pt"><font size="2">Cheers,</font></span></div>
<div><span lang="EN-US" style="FONT-SIZE: 12pt"><font size="2"></font></span> </div>
<div><span lang="EN-US" style="FONT-SIZE: 12pt"><font size="2">Nikos</font></span></div></div><br>
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