Fig. 8.

With revised constraints: ${\mathit{\theta }}_0\mathit{ϵ}\left[0^{\circ },{45}^{\circ }\right]$ and $\mathit{\psi }\mathit{ϵ}\left[0^{\circ },{10}^{\circ }\right]$, the results of post hoc tests on (top row) SHR model’s ${\mathit{\theta }}_0$ (Fibril crimp angle), and (bottom row) $\mathit{\psi }$ (fascicle alignment angle). Top row: age-dependent effects of injury within: a the mature group, b the aging group, and c the aged group. Crimp angle reduced post-injury (0–3 weeks) in the mature group (a) and increased post-injury in the aging group (b), which also exhibited trend toward decrease during healing (3–6 weeks). The aged group exhibited neither statistical significance nor trend post-injury. Bottom row: age-dependent effects of injury within: d the mature group, e the aging group, and f the aged group. Fascicle alignment reduced post-injury (0–3 and 6 weeks) in the mature group (d) and increased post-injury in the aging group (0–3 weeks) (b). The aged group exhibited neither statistical significance nor trend with injury (f). Data are presented as mean ± standard error. Statistical significance is denoted by: ** ($p<0.01$) and * ($p<0.05$) and significant trend is denoted by # ($p<0.1$)