Skip to content

06. MEP Measurements

Jump to bottom
Umair Hassan edited this page Dec 25, 2019 · 2 revisions

Motor Evoked Potential (MEP) Measurements function of the BEST Toolbox, trigger the stimulating device on trial by trial basis in a given inter-trial-interval against set of stimulation intensity conditions and presents you online results of MEPs in order to visualize the MEP shape and quality of data being collected.

Setting Stimulation Parameters

  1. Input Device: Select the input device using drop down menu from previously added devices
  2. Output Device: Select the output device using drop down menu from previously added devices
  3. Display EMG Channels: Type the channel name as a string in order to visualize its online results e.g. 'APBr'. Note that the channel name must resolve to the name in your streaming data
  4. Stimulation Intensities: Row vector of stimulation intensities conditions e.g. [40 50 60 70 80]
  5. Trials per Condition: Total number of trials per condition , if its a scalar e.g. 100 , all stimulation intensity conditions are repeated at this rate but this can be a vector of varying no of trials but equal in size to that of stimulation intensities condition vector described above.
  6. Inter Trial Interval: ITI scalar, or a range in seconds e.g. 4 or [4 6]
  7. MEP onset (ms): The lower and upper limit of MEP search window in ms. MEP is searched using this update-able window and its amplitud and other measures of spread are stored in the data
  8. Pre-Post Stim Extract (ms): The lower and upper limit of EMG data to extract and save in the backend in ms
  9. Pre-Post Stim Plot (ms): The lower and upper limit of EMG data to plot online in ms
  10. Y Axis Max/Min: Limites of plot's Y axis [Lower Upper] in micro-volts
  11. Font Size: Font size of annotations on plots
  12. Trial No for Mean MEP Amp: The no of last N trials to avg and annotate on plot

Starting the Measurement

To start a particularly filled measurement, just press the "Run" button. The measurement can be stopped, paused/unpaused and some of the editable parameters such as Font and YAxis limits can be updated on the runtime.

An instance of the completed filled stimulation parameters panel is shown below.

Clone this wiki locally