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In vivo imaging of retinotopic optic fibers at 17 days regeneration. These fibers were treated with BDNF. The arrowhead indicates one of the many endings followed during the experiment, which was a branch. It bifurcated by the 11:45 a.m. time point. Notice the other branches within the field. The arrow labels a fiber that also bifurcated by the 10:40 a.m. time point. Anterior is to the top and medial to the left of each panel. Scale bar represents 20 μm.
