Which datasets are used in the documentation and where are they used?

The FieldTrip website and ftp server include a variety of datasets. Some of these are used in the tutorials, while others are used in example MATLAB scripts. All of these datasets were recorded from humans, unless otherwise specified.

We try to give a name to each dataset that provides an instant understanding of 'how the data was collected', 'the cognitive domain to which the data relates', and if it applies, 'what specific topic within the domain'. For example: 'MEG-language-semantics' will tell you that the data was collected in an MEG scanner, relates to research in the language domain, and specifically to semantics. Links to the FieldTrip ftp server are provided so that you can download the dataset of interest.

In this frequently asked question you can find links to other open access datasets.

• Dutch sentences presented auditorily. Investigated the effects of semantic congruency and incongruency on sentence processing.
• 151-channel CTF Omega System
• Anatomical MRI scan of Subject01 from this dataset is included and used for the headmodel tutorials
• Details MEG-language
• Link to publication by Wang et al.(2011)
• Download the datasetSubject01.zip from our FTP server.
• There are some additional single-subject raw datasets from this study, which were in the past used to show the effect of the planar gradient transform but which are not used at the moment. These are available from our FTP server as Subject02.zip, Subject03.zip and Subject04.zip. These additional subjects are also used to explain batch processing and distributed computing.
• Group results of this study (comprising 10 subjects) are used in the statistics tutorials.
• Tutorials using this dataset:

  Cluster-based permutation tests on event related fields	2014/05/05 10:39
  Cluster-based permutation tests on event related fields	2009/04/06 21:15	Ingrid Nieuwenhuis
  Cluster-based permutation tests on time-frequency data	2009/04/06 21:16	Ingrid Nieuwenhuis
  Creating a BEM volume conduction model of the head for source-reconstruction of EEG data	2016/01/04 15:54
  Creating a FEM volume conduction model of the head for source-reconstruction of EEG data	2016/01/04 15:50
  Creating a sourcemodel for source-reconstruction of MEG or EEG data	2015/11/23 14:44
  Creating a volume conduction model of the head for source-reconstruction of MEG data	2014/11/12 15:03
  Event related averaging and MEG planar gradient	2009/04/21 13:51
  Plotting data at the channel and source level	2015/07/15 15:33	NLam
  Source reconstruction of event-related fields using minimum-norm estimation	2011/07/06 11:47	Lilla Magyari
  Speeding up your analysis with distributed computing	2011/07/07 13:20	Arjen Stolk
  Time-frequency analysis using Hanning window, multitapers and wavelets	2014/11/12 15:03
  Trigger-based trial selection	2009/07/31 19:23
  Visual artifact rejection	2010/09/15 15:07	Cristiano Micheli

• Dataset specifically generated by FieldTrip members for teaching artifact rejection.
• Data composed of 10s segments with no gaps between segments.
• Download the datasetArtifactMEG.zip from our FTP server.
• Tutorials using this dataset:

  Automatic artifact rejection

  2010/09/15 15:08

  Cristiano Micheli

• Right wrist is maintained in isometric extension against a lever until visual stimulus changes speed. Modulation of the hazard rate of the stimulus' speed change: UP-schedule (likelihood of stimulus change increases as the duration of the constant stimulus increases) and DOWN-schedule (likelihood of stimulus to change decreases a duration of the constant stimulus increases). Analysed change in coherence between oscillations in motor cortex and spinal cord neurons as an indicator of corticospinal interaction.
• 151 CTF System + Electromyography (EMG) recording
• Link to the publication by Schoffelen et al.(2005)
• Download the dataset subjectK.mat from our FTP server.
• Tutorials using this dataset:

  Extended analysis of sensor- and source-level connectivity	2013/02/21 21:03	Eelke Spaak
  Localizing visual gamma and cortico-muscular coherence using DICS	2013/02/21 14:59	Jörn M. Horschig
  Sensor-level ERF, TFR and connectivity analyses	2014/11/12 15:00

• Both wrists in isometric extensions to exert a constant force against a lever. Indicate detected change (speed) of visual stimulus by further extending cued hand. Analyzed the gamma-band coherence as an indicator of communication between sensorimotor regions and and motorneurons in the forearm.
• 151 CTF MEG system
• Download the publication by Schoffelen et al.(2011).
• Download the dataset SubjectCMC.zip from our FTP server.
• Tutorials using this dataset:

  Analysis of corticomuscular coherence

  2010/01/13 15:59

• Covertly attend to cued square: left or right (hemifield). Used alpha oscillations in covert attention as a classifier (left vs. right) for use in brain computer interface.
• 275 CTF MEG system
• Download the dataset covatt.mat from our FTP server.
• Link to the publication by van Gerven et al.(2009).
• Tutorials using this dataset:

  Multivariate analysis of electrophysiological data

  2010/01/29 09:34

• Dataset specifically generated by FieldTrip team members to explain dipole-fitting
• Different forms of mechanical tactile stimulation applied to right index finger.
• Download the datasetTactileStimulusDipolefit.zip from our FTP server.
• Tutorials using this dataset:

  Fit a dipole to the tactile ERF after mechanical stimulation

  2009/05/20 14:57

• Combined MEG/EEG dataset recorded at the NatMEG on the Elekta Triux MEG scanner
• Aditory stimulus presentation with a standard and an oddball, motor responses on the oddball, response hand was cued left or right at the start of each block
• Dataset details
• Download the datasetftp://ftp.fieldtriptoolbox.org/pub/fieldtrip/tutorial/natmeg
• Tutorials using this dataset:

  Beamforming evoked fields and potentials in combined MEG/EEG data	2015/09/09 10:25	Tzvetan Popov
  Beamforming oscillatory responses in combined MEG/EEG data	2014/09/25 10:38	Robert Oostenveld
  Dipole fitting of combined MEG/EEG data	2014/09/25 10:49	Robert Oostenveld
  FieldTrip course at the NatMEG in Stockholm	2015/10/22 09:32	Robert Oostenveld
  FieldTrip workshop in Aarhus	2015/09/23 10:46	Tzvetan Popov
  Preprocessing and event-related activity in combined MEG/EEG data	2014/09/11 10:41
  Time-frequency analysis of combined MEG/EEG data	2014/09/25 10:39	Robert Oostenveld

• Dutch words presented in visual form, auditory form, and picture form. Multivariate pattern analysis used to decode conceptual representations from event-related data
• 64 channel ActiCap system (Brain Products GmbH)
• Link to publication by Simanova et al.(2010).
• Download the dataset SubjectEEG.zip from our FTP server
• Tutorials using this dataset:

  Preprocessing - Reading continuous EEG data

  2011/09/07 08:47

• Dutch words presented in visual form, subjects made positive/negative or animal/human judgments on the nouns.
• 64 channel ActiCap system (Brain Products GmbH)
• Download the dataset here from our FTP server
• Tutorials using this dataset:

  Preprocessing of EEG data and computing ERPs

  2015/11/11 17:21

  Robert Oostenveld

• Data specifically generated by FieldTrip team members for teaching TMS/EEG data analysis.
• Transcranial magnetic stimulation applied to primary motor cortex (M1) while subject contracts or relaxes contralateral hand.
• C-B60 butterfly coil connected to a MagPro X100 (Magventure) stimulator & 61 channel TMS-compatible EEG cap (EasyCap)
• Download the dataset sp_motor.zip from our FTP server.
• Tutorials using this dataset:

  Dealing with TMS-EEG datasets

  2013/09/11 16:40

• Motor task dataset from HCP project
• Recorded at 2000Hz with 248-channel 4D/BTi MEG scanner in St. Louis, USA.
• Subjects do a movement of left hand, right hand, left foot or right foot.
• Download the dataset from the HCP website.
• Details HCP-motort
• Tutorials using this dataset:

  MEG virtual channels and seed-based connectivity	2015/09/15 14:41	Robert Oostenveld
  MEG whole-brain connectivity	2015/09/15 14:47	Robert Oostenveld

• EEG, MEG, fMRI and structural MRI data from 16 subjects, also used in SPM8 and SPM12 documentation
• Recorded by Rik Hanson and colleagues in Cambridge, using 306-channel Elekta/Neuromag system
• Subjects watch familiar, unfamiliar and scrambled faces
• Download the dataset from the MRC-CBU FTP server.
• Details mmfaces
• Tutorials using this dataset:

  FieldTrip beamformer demo	2014/12/23 10:19	Robert Oostenveld
  FieldTrip connectivity demo	2014/12/23 10:20	Robert Oostenveld
  FieldTrip stats demo	2014/12/23 10:20	Robert Oostenveld
  MEG-UK 2015 meeting	2014/12/18 10:48	Robert Oostenveld

• This dataset contains MEG data from two patients. The data was recorded at Aston Brain Centre (ABC) using a 275-channel CTF system and using an Elekta 306-channel system, i.e. for both patients there are the recordings with the two MEG systems. This clinical data was kindly provided by Professor Stefano Seri.
• The data is available from ftp://ftp.fieldtriptoolbox.org/pub/fieldtrip/tutorial/epilepsy
• Tutorials using this dataset:

  Virtual channel analysis of epilepsy MEG data

  2015/10/11 10:13

  Robert Oostenveld

• Monkeys attended to relevant the stimulus while ignoring distracters. Analysed activity in V4 as a function of whether neurons were activated by stimulus or distracters
• Link to the publication by Fries et al.(2001).
• Download the datasetp029_sort_final_01.nex. from our FTP server.
• Tutorials using this dataset:

  Preprocessing and analysis of spike and local field potential data	2012/06/05 14:31	martin vinck
  Preprocessing and analysis of spike-train data	2012/06/05 14:31	martin vinck

• Rat CA1 hippocampal activity measured as rat explores maze
• Download the dataset tt6_7.t from our FTP server.
• Tutorials using this dataset:

  Preprocessing and analysis of spike-train data

  2012/06/05 14:31

  martin vinck

• ECoG data recorded at the Comprehensive Epilepsy Center of the New York University School of Medicine and processed in collaboration with members of the Multisensory Integration Research Group (Charité - University Medicine Berlin).
• The data was recorded from an epilepsy patient implanted with a subdural grid for pre-surgical evaluation and includes a visual localizer task. Different types of visual stimuli were presented.
• Download the dataset SubjectNY394.zip
• Tutorials using this dataset:

  Analysis of high-gamma band signals in human ECoG

  2018/03/08 06:48

  Arjen Stolk

• Intracranial EEG data (ECoG and Stereo EEG) obtained at the UC Irvine Medical Center. Includes a pre-implantation MR and a post-implantation CT, the latter showing the recording electrodes.
• Download the dataset SubjectUCI29.zip
• Tutorials using this dataset:

  Analysis of human ECoG and sEEG recordings

  2015/12/04 18:50

  Arjen Stolk

• Single-channel fNIRS recording of motorcortex using an Oxymon MK III system of Artinis Medical Systems during finger tapping task.
• Download the data here ftp.fieldtriptoolbox.org/pub/fieldtrip/tutorial/nirs_singlechannel/motor_cortex.oxy3
• Tutorials using this dataset:

  Preprocessing and averaging of single-channel NIRS data

  2018/04/06 10:38

  Robert Oostenveld

• Download the dataset here ftp.fieldtriptoolbox.org/pub/fieldtrip/tutorial/nirs_multichannel
• The fNIRS data was recorded using 4 connected Oxymon systems from Artinis to enable a 48 channel recording. Data was sampled at 250 Hz. Data was recorded during an event-related auditory oddball paradigm.
• Tutorials using this dataset:

  Preprocessing and averaging of multi-channel NIRS data

  2018/04/06 10:38

  Robert Oostenveld