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This is a U.S. Government computer system, which may be accessed and used only for authorized Government business by authorized personnel. Unauthorized access or use of this computer system may subject violators to criminal, civil, and/or administrative action. All information on this computer system may be intercepted, recorded, read, copied, and disclosed by and to authorized personnel for official purposes, including criminal investigations. Such information includes sensitive data encrypted to comply with confidentiality and privacy requirements. Access or use of this computer system by any person, whether authorized or unauthorized, constitutes consent to these terms. There is no right of privacy in this system.

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NIMH Data Archive
NDA ABCD CCF OAI NIAAADA AMP SCZ HEAL

Magnetoencephalography (MEG)

478 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
07/26/2023
View Change History
01
Definition
Submission Template
Query Element Name Data Type Size Required Condition 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::1440 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 gender
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 Conditional isNull(manifest) Data file (image, behavioral, anatomical, etc)
Query image_file_format String 50 Recommended 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; NIRS; DAT
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
manifest Manifest Conditional isNull(image_file)
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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