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Context

The localizers are short cognitive tasks aimed at localizing some well known activities. The localizers and the anlyzing tools ahve been developed by Jean-Philippe Lachaux's team who nicely shared the code with us.

 

Start

The first localizers where done the 20/06/2018 with patient pat_02614_1073

tests

The stimuli are sent via "presentation" software.

Preprocessing

Fore each loca of each pat (pat_ccccc_mmmm)

  • create a folder :
pat_ccccc_mmmm_LocaName
  • Rename .TRC file as
pat_ccccc_mmmm_locaname.TRC

 

Depending on the acquisition settings, the analysis requiers different preprocessing steps.

Nlx2MM

This configuration is to be avoided.

TTL are sent to Neuralynx that send them to Micromed:

  • TTL numbers are all presents and with correct number
  • Timings of TTL on Neuralynx are good
  • Timings of TTL on Micromed have up to 200 ms delay

Solution: take timing from neurlaynx and find the time dely between Neuralynx and Micromed to transpose the correct TTL timings to Micromed

Neuralynx and Micromed in parallel

Trigger only via TTL

Trigger via TTL and bipolar voltage input

Micromed direct

Convert .TRC to ELAN

Launch.exe : F:\IR-IHU-ICM\Bureautique\EpiDBS\Epimicro\ExperimentProtocol\Localizer\DataLyon\Localizer - 21-02-2018\Localizer.exe

Load .TRC file: Fichier → Charger un fichier individuel

Select File and click on 'Convert to ELAN File

 

Create .pos, 3 columns separated with tabs, and save it as

pat_ccccc_mmmm_locaname_raw.pos

column 1 : sample

column 2 : TTL value

column 3 : 0

 

Analyses

Run analysis

Select patient folder Fichier → Ouvrir dossier patient

Load the patient folder pat_ccccc_mmmm

Check:

  • Loca to analyze
  • "Execute the same Analysis for each Frequency Band"
  • "Generate Time Frequency Envelloppe"
  • Generate Maps (trialmat)
  • Generate Envellope Plots

Click on "Process Analysis"

 

 

Select chanels to analyze in the popup window

 

 

 

Issues

  • If electrode has a number in the name, name cut at the first number: ex Ha2g1 will be Ha2
  • 2 "l" in Envelloppe"
  • 2 "l" ans 1 "p" in Envellope"

 

 

 

 

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