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File:Scintillating scotoma.gif

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Scintillating_scotoma.gif (553 × 415 pixels, file size: 931 KB, MIME type: image/gif, looped, 5 frames, 0.5 s)

Summary

Description
English: An interpretation of what is believed to have been a form of scintillating scotoma, experienced by the author in June 2011. It is to be looked on at the center of the image.

The aura was shaped like a spiral starting in the center of the vision field, passing over upper left quadrant and reaching limit of vision field at lower left border. The scintillations of the aura had some resemblance to a Widmanstätten pattern, and made it relatively easy to make out the borders of the aura, which were relatively well demarcated from normal areas. It was impossible to distinguish any shapes within the aura, but, similarly to the physiological blind spot, it melted into the background with the overall coloring appearing to represent that of the target objects in the environment. No obvious zigzag pattern was seen.

Onset was over a few minutes and it faded away (rather than decreased in area) over approximately 30 minutes. It was succeeded by no or negligible headache.

Scotomas had been experienced before at frequencies of approximately one to two times per year, and of similar duration, but not with as clearly demarcated scintillating areas as on this occasion. A previous brain CT-scan was normal.
Date
Source

Own work

Original photo without aura.
Author

Mikael Häggström.

When using this image in external works, it may be cited as:

or

  • By Mikael Häggström, used with permission.
Other versions
Previous version, before attempt to visualize the Widmanstätten pattern.

Licensing

I, the copyright holder of this work, hereby publish it under the following license:
Creative Commons CC-Zero This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.

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21 June 2011

File history

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Date/TimeThumbnailDimensionsUserComment
current05:33, 11 November 2011Thumbnail for version as of 05:33, 11 November 2011553 × 415 (931 KB)Mikael Häggströmadded Widmanstätten pattern
18:56, 10 November 2011Thumbnail for version as of 18:56, 10 November 2011553 × 415 (944 KB)Mikael Häggströmredid
18:53, 10 November 2011Thumbnail for version as of 18:53, 10 November 2011553 × 415 (944 KB)Mikael Häggströmless annoying speed
06:11, 21 June 2011Thumbnail for version as of 06:11, 21 June 2011553 × 415 (944 KB)Mikael Häggström{{Information |Description ={{en|1=g}} |Source ={{own}} |Author =Mikael Häggström |Date =2011-06-21 |Permission = |other_versions = }} g

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