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. 2013 Nov 20;8(11):e80896. doi: 10.1371/journal.pone.0080896

Figure 2. Density of cells in the PCT increases after injury.

Figure 2

(A) Schematic illustration of both normal and injured PCT showing the cellular arrangement along the tract, including the quantified area (1 µm). The anatomical position of the tract is represented by a double-sensed arrow on the top (retina – brain). (A′) 48 h after injury, the distal part of the tract had approximately three times as many cells as the control group. Student t test revealed a significant difference between the two groups (n = 5 crabs/group; p<0.005). (B) Schematic illustration of the injured tract divided into two regions (500 µm each): proximal (P) and distal (D) to the lesion. Most cells are grouped in the damaged area 500 µm from the injury. In contrast, region D maintains the same cellular density as seen in the control. (B′) Statistical analysis shows twice as many cells in region P as in D. Student t test revealed a significant difference between the two groups (n = 5 crabs/group; p<0.05). Asterisks denote significant differences between groups.