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Magnetoencephalography (MEG)

400 Shared Subjects

Magnetoencephalography (MEG) measures as defined by Dr. Timothy Roberts' lab at the Children's Hospital of Philadelphia
Neurosignal Recordings
MEG
07/11/2012
meg01
07/11/2012
View Change History
01
Query Element Name Data Type Size Required Description Value Range Notes Aliases
subjectkey GUID Required The NDAR Global Unique Identifier (GUID) for research subject NDAR*
src_subject_id String 20 Required Subject ID how it's defined in lab/project
interview_date Date Required Date on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYY
interview_age Integer Required Age in months at the time of the interview/test/sampling/imaging. 0 :: 1260 Age is rounded to chronological month. If the research participant is 15-days-old at time of interview, the appropriate value would be 0 months. If the participant is 16-days-old, the value would be 1 month.
sex String 20 Required Sex of subject at birth M;F; O; NR M = Male; F = Female; O=Other; NR = Not reported
Query m100_left Float Recommended Left hemisphere M100 response latency (measured by MEG) to 500Hz tone stimulus 80.0 :: 200.0
Query m100_right Float Recommended Right hemisphere M100 response latency (measured by MEG) to 500Hz tone stimulus 80.0 :: 200.0
Query mmf_left Float Recommended Left hemisphere mismatchfield (MMF) response latency (measured by MEG) averaged over tone and vowel stimuli 100.0 :: 400.0
Query mmf_right Float Recommended Right hemisphere mismatchfield (MMF) response latency (measured by MEG) averaged over tone and vowel stimuli 100.0 :: 400.0
Query md_slf_left Float Recommended Mean diffusivity along the left hemisphere superior longitudinal fasciculus 0.0 :: 0.003 Mean diffusivity is measured in mm^2/sec
Query md_slf_right Float Recommended Mean diffusivity along the right hemisphere superior longitudinal fasciculus 0.0 :: 0.003 Mean diffusivity is measured in mm^2/sec
Query fa_slf_left Float Recommended Fractional anisotropy along the left hemisphere superior longitudinal fasciculus 0.0::1.0 Fractional anisotropy is a ratio and has no unit
Query fa_slf_right Float Recommended Fractional anisotropy along the right hemisphere superior longitudinal fasciculus 0.0::1.0 Fractional anisotropy is a ratio and has no unit
image_file File Required Data file (image, behavioral, anatomical, etc)
Query image_file_format String 50 Required Image file format AFNI; ANALYZE; AVI; BIORAD; BMP; BRIK; BRUKER; CHESHIRE; COR; DICOM; DM3; FITS; GE GENESIS; GE SIGNA4X; GIF; HEAD; ICO; ICS; INTERFILE; JPEG; LSM; MAGNETOM VISION; MEDIVISION; MGH; MICRO CAT; MINC; MIPAV XML; MRC; NIFTI; NRRD; OSM; PCX; PIC; PICT; PNG; QT; RAW; SPM; STK; TIFF; TGA; TMG; XBM; XPM; PARREC; MINC HDF; LIFF; BFLOAT; SIEMENS TEXT; ZVI; JP2; MATLAB; VISTA; ecat6; ecat7; PAR/REC; FIF
vendor String 100 Recommended Vendor
machine_model_name String 50 Recommended Machine model name
Query mri_field_strength Float Recommended Field Strength of MRI (typically 1.5 or 3 T) 0.0 :: 8.0
Query dti_b_value Float Recommended "b-value" for DTI (typically 1000s/mm^2) 0.0 :: 10000.0 B-value is measured in sec/mm^2
Query dti_number_directions Integer Recommended Number of diffusion encoding directions (typically 6 or 30) 6 :: 999
task String 4,000 Recommended Cognitive process being studied
stimulus_type String 50 Recommended Stimulus set (e.g. "tones")
Query tone_freq Float Recommended Frequency of tone stimuli 0.0 :: 20000.0
vowel_type String 50 Recommended Vowels used (e.g. "a" or "a u")
stimulus_level String 50 Recommended Stimulus level (e.g. "45dB SL" or "70dB SPL")
Query number_trials Integer Recommended Number of trials of each stimulus type
Query filter_lo_pass Float Recommended Low pass filter used in determining MEG DV's 1.0 :: 1200.0
Query filter_hi_pass Float Recommended High pass filter used in determining MEG DV's 0.0 :: 20.0
source_or_sensor String 50 Recommended Were analyses conducted in source space or sensor space ?
Query sample_rate Float Recommended Acquisition sample rate 0.0 :: 12000.0
Data Structure

This page displays the data structure defined for the measure identified in the title and structure short name. The table below displays a list of data elements in this structure (also called variables) and the following information:

  • Element Name: This is the standard element name
  • Data Type: Which type of data this element is, e.g. String, Float, File location.
  • Size: If applicable, the character limit of this element
  • Required: This column displays whether the element is Required for valid submissions, Recommended for valid submissions, Conditional on other elements, or Optional
  • Description: A basic description
  • Value Range: Which values can appear validly in this element (case sensitive for strings)
  • Notes: Expanded description or notes on coding of values
  • Aliases: A list of currently supported Aliases (alternate element names)
  • For valid elements with shared data, on the far left is a Filter button you can use to view a summary of shared data for that element and apply a query filter to your Cart based on selected value ranges

At the top of this page you can also:

  • Use the search bar to filter the elements displayed. This will not filter on the Size of Required columns
  • Download a copy of this definition in CSV format
  • Download a blank CSV submission template prepopulated with the correct structure header rows ready to fill with subject records and upload

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