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Mean directional information content before (PRE LESION), immediately after [POST (immediate)], and several days after [POST (delayed)] LMN lesions. Note that BLs completely eliminated all directional information content, but HD cells remain directional after UL and CTL lesions. There is no postdelayed condition for BL or CTL lesions, because HD cells were never again encountered after BLs, and searching for additional cells was not conducted after CTL lesions.
