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Line 25: − == Software Documentation == − Find the Brainvision analyzer manual here [[Media:BrainVision_Analyzer_UM.pdf]] − Find the Brainvision recorder manual here [[Media:BrainVision_Recorder_UM.pdf]]+ + + + + − Find the Brainvision macro cookbook manual here [[Media:Macro_Cookbook.pdf]]+ − Find the Brainvision RecView manual here [[Media:BrainVision_RecView_UM.pdf]]+ − Find the Brainvision Automation manual here [[Media:Automation_Reference_Manual.pdf]] − = EEG Markers = − == Presentation ==+ − <nowiki>+ + Line 32:
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= Brainvision EEG =
{{Infobox tsg
[[File:brain-vision-llc.png|right|200px|Image: 200 pixels]]
| name = Brainvision
| image = Logo brainproducts.png
| caption = <br />Files provided on your Wiki page are neither provided by Brain Products nor up to date; The most current versions of all these files can be found on the brain products website at<br />https://www.brainproducts.com/downloads.php<br /><br />
| downloads = {{bulleted list
| [https://surfdrive.surf.nl/files/index.php/s/LN5KRN9cB3mvPp3 Brainvision Analyzer] (zip)
| [https://surfdrive.surf.nl/files/index.php/s/LN5KRN9cB3mvPp3 Brainvision Recorder] (zip)
}}
| manuals = {{bulleted list
| [https://surfdrive.surf.nl/files/index.php/s/LN5KRN9cB3mvPp3 Brainvision Analyser Manual]
| [https://surfdrive.surf.nl/files/index.php/s/LN5KRN9cB3mvPp3 Brainvision Recorder Manual]
| [https://surfdrive.surf.nl/files/index.php/s/LN5KRN9cB3mvPp3 Brainvision Macro Cookbook Manual]
| [https://surfdrive.surf.nl/files/index.php/s/LN5KRN9cB3mvPp3 Brainvision RecView Manual]
| [https://surfdrive.surf.nl/files/index.php/s/LN5KRN9cB3mvPp3 Brainvision Automation Manual]
}}
}}
Electroencephalography is the neurophysiological measurement of electrical activity in the brain as recorded by electrodes placed on the scalp or, in special cases, subdurally or in the cerebral cortex. The resulting traces are known as an electroencephalogram (EEG) and represent a summation of post-synaptic potentials from a large number of neurons.
Electroencephalography is the neurophysiological measurement of electrical activity in the brain as recorded by electrodes placed on the scalp or, in special cases, subdurally or in the cerebral cortex. The resulting traces are known as an electroencephalogram (EEG) and represent a summation of post-synaptic potentials from a large number of neurons.
Brain Products EEG amplifiers are equipped with a number of noise reduction techniques such as active noise cancellation and active electrodes. High common mode rejection as well as low amplifier noise ensure maximum data quality. Our huge product range includes a range of electrodes and caps with custom or standard montages as well as a variety of requisite accessories.
Brain Products EEG amplifiers are equipped with a number of noise reduction techniques such as active noise cancellation and active electrodes. High common mode rejection as well as low amplifier noise ensure maximum data quality. Our huge product range includes a range of electrodes and caps with custom or standard montages as well as a variety of requisite accessories.
== Digital Port Settings (Markers/Buttonbox) ==
[[image:DigitalPort.jpg]]
== Interface BITSIbox ==
For the settings of the interface and to send the markers go to: http://tsgdoc.socsci.ru.nl/index.php?title=ButtonBoxes
== Presentation ==
In the BITSI simple protocol you will have to reset the code manually to 0.
BITSI simple code:
<syntaxhighlight lang="python" line>
#TemplateINFO.pcl
#TemplateINFO.pcl
Oport.send_code(100); #This is your marker code, range code 1-255
Oport.send_code(100); #This is your marker code, range code 1-255
wait_interval(2); #2ms delay for the code to be recorded by brainvision; 2ms->500hz sampling rate
wait_interval(4); #4ms delay for the code to be recorded by brainvision; 2ms->500hz sampling rate so 2 samples available
Oport.send_code(0); #Back to 0; now ready to send a new code</nowiki>
Oport.send_code(0); #Back to 0; now ready to send a new code
</syntaxhighlight>
In BITSI extended protocol the reset is done by a specific time set with the capital "T".
BITSI extended:
<syntaxhighlight lang="python" line>
#TemplateINFO.pcl
output_port Oport = output_port_manager.get_port( 1 );
#TemplateSUBS.pcl
#only specify this ones, then its valid for the full experiment
Oport.send_string("T"); #Specify the pulse length time
Oport.send_code(4); #4ms delay for the code to be recorded by brainvision; 2ms->500hz sampling rate so 2 samples available
Oport.send_string("P"); #Specify its a pulse you want to send out
Oport.send_code(100); #This is your marker code, range code 1-255
#Now it resets itself automatically to 0 after the specified time
</syntaxhighlight>
== Python ==
== Python ==
<syntaxhighlight lang="python" line>
#!/usr/bin/env python
#!/usr/bin/env python
bb.sendMarker(100) #This is your marker code, range code 1-255
bb.sendMarker(100) #This is your marker code, range code 1-255
core.wait(0.002) #2ms delay for the code to be recorded by brainvision; 2ms->500hz sampling rate
core.wait(0.002) #2ms delay for the code to be recorded by brainvision; 2ms->500hz sampling rate
bb.sendMarker(0) #Back to 0; now ready to send a new code</nowiki>
bb.sendMarker(0) #Back to 0; now ready to send a new code
</syntaxhighlight>
== BrainVision Recorder - Default Workspace ==
== BrainVision Recorder - Default Workspace ==
Links and Documentation For the standard 32 and 64 electrode setup, workspaces are available here.
Links and Documentation For the standard 32 and 64 electrode setup, workspaces are available here.
Find the Brainvision analyzer manual here [[Media:actiCAP 32 Channel_default.zip]]
Find the Brainvision analyzer manual here [[Media:actiCAP-32Ch-standard workspace DCC_new.zip]]
Find the Brainvision analyzer manual here [[Media:actiCAP 64 Channel_default.zip]]
Find the Brainvision analyzer manual here [[Media:actiCAP-64Ch-standard workspace DCC_new.zip]]
Please check the BrainVision Recorder manual (English / German) for more in depth details.
Please check the BrainVision Recorder manual (English / German) for more in depth details.
Click on the button "next", the following window appears on your screen:
Click on the button "next", the following window appears on your screen:
[[File:2.png]]
[[File:screenshot amplifier settings.png|600px|Image: 600 pixels]]
First press "Scan for Amplifiers". BrainVision Recorder will give an overview of the amplifiers the software is communicating with.
First press "Scan for Amplifiers". BrainVision Recorder will give an overview of the amplifiers the software is communicating with.
The following default DCC settings are recommended for all channels.
The following default DCC settings are recommended for all channels.
{| border="2" cellspacing="1" cellpadding="1" style="width: 600px;"
{| class="wikitable"
|-
|-
!Setting
!Default
|-
|-
|Nr. of channels to be used
|Nr. of channels to be used
Click on the button Next, the following window appears on your screen.
Click on the button Next, the following window appears on your screen.
[[File:3.png]]
[[File:screenshot software filters.png|600px|Image: 600 pixels]]
The following default settings are recommended for all channels:
The following default settings are recommended for all channels:
{| border="2" cellspacing="1" cellpadding="1" style="width: 600px;"
{| class="wikitable"
|-
|-
!Setting
!Default DCC settings
|-
|-
|Enable filters
|Enable filters
Sampling of the EEG is done by the amplifier with 5000Hz fixed and either 1000Hz anti aliasing filter (normal) or 250Hz anti aliasing filter (MRI only!). Downsampling can be done realtime on the computer to 200, 250, 500, 1000, 2500 or 5000. An appropriate anti-aliasing filter should be selected for that as well, depending on the downsampling frequency.
Sampling of the EEG is done by the amplifier with 5000Hz fixed and either 1000Hz anti aliasing filter (normal) or 250Hz anti aliasing filter (MRI only!). Downsampling can be done realtime on the computer to 200, 250, 500, 1000, 2500 or 5000. An appropriate anti-aliasing filter should be selected for that as well, depending on the downsampling frequency.
At the default sampling rate of 500Hz, use a cutoff frequency of 200Hz.
At the default sampling rate of 500Hz, use a cutoff frequency not higher than 200Hz.
'''Note 2:'''
'''Note 2:'''
Skin impedance should be kept low, e.g. below 3kΩ. We are currently looking into the possibility of running experiments with high skin impedance.
Skin impedance should be kept low, e.g. below 20kΩ. We are currently looking into the possibility of running experiments with high skin impedance.
'''TAB2: "Segmentation filters"'''
'''TAB2: "Segmentation filters"'''
It is recommended to set the filters in exactly the same way as the "Raw Data Saving Filters" so that you see is what you get.
It is recommended to set the filters in exactly the same way as the "Raw Data Saving Filters" so that you see is what you get.
Thus, the following default settings are recommended:
Thus, the following default settings are recommended:
{| border="2" cellspacing="1" cellpadding="1" style="width: 600px;"
{| class="wikitable"
|-
|-
!Setting
!Default
|-
|-
|Enable filters
|Enable filters