Figure 5.

Longitudinal and transverse residual strain versus age in the dura mater of immature rats. Longitudinal strain (filled circle, ϵ_L) showed no dependence with age (p=0.6598), and transverse strain (open circle, ϵ_T) exhibited a weak but statistically significant decrease with age (${ϵ}_{\text{T}}=5.45-0.13\times \text{age}$, r²=0.1536, p=0.0219; regression line not shown). The mean longitudinal residual strain was significantly larger than the mean transverse residual strain (6.11±3.62% versus 3.82±2.64%, p=0.0218). A line connects the longitudinal strain and transverse strain for a given rat.