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@@ -21,9 +21,14 @@ Ganglion unit spike train data recorded from marmoset retina. Focus on stimulati
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`spike_sorting_ks.ods` contains only the metadata and is there for backward compatibility purposes.
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### frametimes
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-contains the pulses for each stimulus e.g. 1.npz
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-both onsets and offsets
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+Synchronization of stimulus and recorded data.
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+
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+There is a delay between a pulse being recorded and the screen actually updating. This is the monitor_delay cell in the `spike_sorting_ks.ods` file.
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+
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+This value is already added when saving `.npz` files. They already contain the correction, in contrast to the `.mat` files that most people use in the lab, which do not have it.
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+
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+The npz files contain two arrays, f_on and f_off, respectively for the onsets and the offsets of the square-wave pulse. For more information, check the code `pymer/modules/analysis_scripts.py:extractframetimes`
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### ks_sorted
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