Fig. 4.

Comparison of depth of axon extension into the channels with and without addition of the SCs. Axon extension is quantified after 21 days of culture for both the control and SC groups. The penetration depth ratio is defined as the penetration depth of the SC group divided by the control group. The average is across all 4 channel sizes (50, 100, 150 and 200 µm), and the standard errors are calculated from 5 replicates. *p value < 0.05