{
  "id": 9354,
  "title": "Channel name to location of electrode",
  "url": "/competitions/seizure-detection/discussion/9354",
  "author_name": "",
  "post_date": "2014-06-01T22:28:34.613Z",
  "votes": null,
  "comment_count": 4,
  "views": 1468,
  "content": "<p>Are these channel names from some standard? I was expecting something like the 10/20 system but can't figure out where these names came from.</p>\n\n<p>Concretely, is there a way to infer electrode positions from channel names?</p>",
  "messages": [
    {
      "id": "48455",
      "postDate": "06/01/2014 22:28:34",
      "content": "<p>Are these channel names from some standard? I was expecting something like the 10/20 system but can't figure out where these names came from.</p>\n\n<p>Concretely, is there a way to infer electrode positions from channel names?</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "48464",
      "postDate": "06/02/2014 07:48:06",
      "content": "<p>Since it's intracranial EEG, the electrode 'panel' was probably placed over a region that made sense for localizing the seizure origin, but probably doesn't conform to any standard electrode placement system.</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "48477",
      "postDate": "06/02/2014 13:57:11",
      "content": "<p>cMadan is correct. Since this is intracranial EEG, the 10/20 system isn't applicable, as it is only relevant to the placement of scalp EEG electrodes. For intracranial EEG electrode placement is not done by any standard system but must be tailored to the suspected seizure focus. There's a good overview on <a href=\"https://en.wikipedia.org/wiki/Electrocorticography\">wikipedia</a>.</p>",
      "rawMarkdown": "",
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    },
    {
      "id": "48563",
      "postDate": "06/03/2014 14:26:22",
      "content": "<p>Thanks for clarifying that. It's surprising that iEEG doesn't have a standard for electrode placement.</p>\n<p>Do these channel names express something consistent across the files? E.g. brain region, hemisphere or spatial layout of the electrodes?</p>\n\n<p>For instance can you at least tell how (spatially) close two electrodes are from their channel names?</p>",
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    },
    {
      "id": "48569",
      "postDate": "06/03/2014 19:04:05",
      "content": "<p>There are efforts to standardize nomenclature for iEEG, but so far (at least to my knowledge) there's not a standard guideline. Our electrode names usually are abbreviations of some anatomical area, for example RTG could be a right temporal lobe grid, LFS could be a left frontal strip, etc. Electrodes are usually numbered sequentially, but there is no convention as to anatomically which direction electrodes are numbered. Electrode contacts are typically about 1 cm apart on subdural grid and strip electrodes, and perhaps a bit closer on depth electrodes.</p>",
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      "votes": null
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  ],
  "comments": [
    {
      "id": 48464,
      "author_name": "cmadan",
      "author_url": "",
      "post_date": "06/02/2014 07:48:06",
      "content": "<p>Since it's intracranial EEG, the electrode 'panel' was probably placed over a region that made sense for localizing the seizure origin, but probably doesn't conform to any standard electrode placement system.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 48477,
      "author_name": "bbrinkm",
      "author_url": "",
      "post_date": "06/02/2014 13:57:11",
      "content": "<p>cMadan is correct. Since this is intracranial EEG, the 10/20 system isn't applicable, as it is only relevant to the placement of scalp EEG electrodes. For intracranial EEG electrode placement is not done by any standard system but must be tailored to the suspected seizure focus. There's a good overview on <a href=\"https://en.wikipedia.org/wiki/Electrocorticography\">wikipedia</a>.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 48563,
      "author_name": "mridulkhan",
      "author_url": "",
      "post_date": "06/03/2014 14:26:22",
      "content": "<p>Thanks for clarifying that. It's surprising that iEEG doesn't have a standard for electrode placement.</p>\n<p>Do these channel names express something consistent across the files? E.g. brain region, hemisphere or spatial layout of the electrodes?</p>\n\n<p>For instance can you at least tell how (spatially) close two electrodes are from their channel names?</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 48569,
      "author_name": "bbrinkm",
      "author_url": "",
      "post_date": "06/03/2014 19:04:05",
      "content": "<p>There are efforts to standardize nomenclature for iEEG, but so far (at least to my knowledge) there's not a standard guideline. Our electrode names usually are abbreviations of some anatomical area, for example RTG could be a right temporal lobe grid, LFS could be a left frontal strip, etc. Electrodes are usually numbered sequentially, but there is no convention as to anatomically which direction electrodes are numbered. Electrode contacts are typically about 1 cm apart on subdural grid and strip electrodes, and perhaps a bit closer on depth electrodes.</p>",
      "votes": null,
      "replies": []
    }
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