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# MEG_Arrow_Task_2021
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+Cortical Oscillatory Dysfunction in Parkinson Disease
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+During Movement Activation and Inhibition
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+Elizabeth Disbrow: LSU Health Shreveport Center for Brain Health, Shreveport LA, USA
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+ Department of Neurology, LSU Health Shreveport, Shreveport LA, USA
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+ ORCID: 0000-0002-2133-3221
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+Leighton Hinkley: Department of Radiology and Biomedical Imaging, University of
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+ California, San Francisco, USA
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+ ORCID: 0000-0001-7024-3532
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+Neuromagnetic activity was recorded in a magnetically shielded room using a whole-head biomagnetometer (CTF MEG, Coquitlam, Canada) with 275 first-order axial gradiometers and 27 reference sensors that enabled collection of synthetic third-order gradient data with improved signal-to-noise ratio. Coils at the nasion and 1 cm from the tragus, rostral to the left and right periauricular points in the direction of the nasion, were used to quantify head position relative to the sensor array.
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+The structural MRI scan was acquired on a 1.5 T GE Signa scanner using an MP-RAGE (multiplanar rapidly acquired gradient echo) imaging sequence with the following parameters: repetition time (TR), 7.87 s; echo time (TE), 2.69 ms; flip angle, 8 degrees; slices, 200; field of view, 256 mm; resolution, 1 x 1 x 1.2 mm.
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+The data is stored in BIDS format using the CTF *.ds filetype. It can be opened in either proprietary CTF software (Omega 2000) or open-source M/EEG software packages (NUTMEG, fieldtrip). The Fieldtrip website expands a bit on the file format here : https://www.fieldtriptoolbox.org/getting_started/ctf/
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