Core MEG system

Core MEG system

Magnetoencephalography (MEG).

  • The core system at NatMEG is an Elekta Neuromag TRIUX 306-channel system (102 magnetometers, 204 planar gradiometers).

Further technical specifications are found here.

System technical manual is found here.

 

Electroencephalography (EEG).

  • The Elekta Neuromag TRIUX has an integrated MEG-compatible 128 channel EEG system.

Further technical specifications are found here.

System technical manual is found here.

We currently use 128 channel caps, 74 channel caps and 128-slit custom montage caps from EasyCap

 

 

Biochannels.

  • The Elekta Neuromag TRIUX also has 12 integrated bipolar channels, for recording of electrooculgraphy (EOG), electrocardiography (ECG), and electromyography (EMG).

Further technical specifications are found here.

System technical manual is found here.

We currently use the EL508 electrodes and LEAD108 and LEAD108a from BioPac for most biochannel measurements. We also use the EL254RT for facial EMG.

 

Triggers and time-locking. A total of 32 digital channels and 24 analog channels are sampled in parallell and synchronized to the MEG, EEG and biochannels data.

Further technical specifications are found here.

System technical manual is found here.

 

Magnetically shielded room (MSR)

  • All MEG/EEG recordings are done within a two-layer MSR, model Ak3B from Vacuumschmelze GmbH.

Further technical specifications for the MSR are found here.

For an overview of the MSR shielding factor across frequencies, see here.