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Dark Horse Neuro EXAMPLE DATASETS

example_data.medd

  • Analog Content: 2 channels; 2.5 ms, 9 mV square wave pulses at 55 Hz
  • MED Content:
    • Sampling Rate: 40 kHz (all channels)
    • Segments: 6
    • Discontinuities: 7
    • Records: Note, Nlxp, & Sgmt
    • Compression: PRED (all channels)
  • Size: 164 MB; 53 minutes
  • Utility: Visualizing screen aliasing, discontinuities, & records
Download example_data.medd

var_sf.medd

  • Analog Content: single, low noise intracranial macro channel with HFOs; replicated 3 times; 3 µV unique white noise added to each channel
  • MED Content:
    • Sampling Rate: 5, 16, 32, & 40 kHz
    • Segments: 1
    • Discontinuities: none
    • Records: Nlxp & Sgmt
    • Compression: PRED (all channels)
  • Size: 2.2 MB; 100 seconds
  • Utility: Visualizing variable sampling frequency channels, & records
Download var_sf.medd.zip

sine_waves.medd

  • Analog Content: 1st channel: +/- 100 µV 1 Hz sine wave +/- 5 µV white noise;
    Subsequent channels (31):amplitude decreased by 2.5 µV, frequency increased by 1 Hz from previous channel;
    +/- 5 µV white noise;
  • MED Content:
    • Sampling Rate: 32 kHz (all channels)
    • Segments: 1
    • Discontinuities: none
    • Records: Nlxp & Sgmt
    • Compression: PRED (all channels)
  • Size: 87 MB; 3 minutes
  • Utility: MED output of CSC2MED with “CSC_sine_waves” input & NRD2MED with “NRD_sine_waves.nrd”
Download sine_waves.medd

CSC_sine_waves.zip

  • Analog Content: 1st channel: +/- 100 µV 1 Hz sine wave +/- 5 µV white noise;
    Subsequent channels (31): amplitude decreased by 2.5 µV, frequency increased by 1 Hz from previous channel;
    +/- 5 µV white noise;
  • Size: 182 MB; 3 minutes
  • Utility: test input for CSC2MED
Download CSC_sine_waves.zip

NRD_sine_waves.nrd

  • Analog Content: First channel: +/- 100 µV 1 Hz sine wave +/- 5 µV white noise;
    Subsequent channels (31):amplitude decreased by 2.5 µV, frequency increased by 1 Hz from previous channel;
    +/- 5 µV white noise;
  • Size: 1.07 GB; 3 minutes
  • Utility: test input for NRD2MED
Download NRD_sine_waves.nrd

compression_comparison.medd

  • Analog Content: single, intracranial microwire channel with unit waveforms; replicated 21 times
  • MED Content:
    • Sampling Rate: 30 kHz (all channels)
    • Segments: 1
    • Discontinuities: none
    • Records: none
    • Compression: PRED +/- antialias & noise floor filters; VDS at various thresholds & LFP-filter settings
  • Size: 14.5 MB; 60 seconds
  • Utility: Visualizing effects of different compression parameters
Download compression_comparison.medd

line_noise_comparison.medd

  • Analog Content:
    • 1st channel: single, low noise intracranial microwire channel with unit waveforms with 60 Hz line noise added (5th channel)
    • 2nd channel: 1st channel before line noise added (5th channel)
    • 3rd channel: 1st channel with DHN line noise removal algorithm applied
    • 4th channel: 1st channel with notch filter applied (55-65 Hz bandstop; 4 pole Butterworth IIR; forward & reverse filter)
    • 5th channel: real-world, separately-recorded, 60 Hz line noise
    • 6th channel: 1st channel minus 3rd channel (for comparison with 5th channel)
    • 7th channel: 1st channel minus 4rd channel (for comparison with 5th channel)
  • MED Content:
    • Sampling Rate: 30 kHz (all channels)
    • Segments: 1
    • Discontinuities: none
    • Records: none
    • Compression: (all channels)
  • Size: 31 MB; 5 minutes
  • Utility: Visualizing efficacy of DHN line noise removal vs. notch filtering
Download line_noise_comparison.medd