Megh Marathe Annotations

Found Visualizations (https://stsinfrastructures.org/content/sketch-6-found-visualizations/essay)

Monday, August 10, 2020 - 8:04pm

Picture showing the main components of an electroencephalogram (EEG): electrodes attached to a person's head and a display showing brainwaves. Image via Bright Brain Centre.

Figure 1. Picture showing the main components of an electroencephalogram (EEG): electrodes attached to a person's head and a display showing brainwaves. Image via Bright Brain Centre (http://www.brightbraincentre.co.uk).

A screenshot of twelve seconds of EEG showing twenty horizontal line graphs: nineteen black brainwaves and a red heart rate (EKG).

Figure 2. A screenshot of twelve seconds of EEG showing twenty horizontal line graphs: nineteen black brainwaves and a red heart rate (EKG). Image via William O Tatum, 2013, Normal "suspicious" EEG. Neurology 80, Issue 1, Supplement 1, S4–S11.

The black arrows point to evenly-spaced peaks in the first half of the figure; and the red arrows point to choppy patterns in the second half of the figure. Counterintuitively, on EEG, abnormal brainwaves (seizure) can appear 'normal' / evenly spaced, whereas normal brainwaves are choppy and weird!

For more, see my paper (https://doi.org/10.1177/0961463X20908079, ask me for the pdf!) 

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