(a) Phe concentration–effect curves from control carotid arteries and contralateral and ipsilateral arteries 4 and 7 days after the injury; (b) Emax values (g) for Phe obtained in control, contralateral and ipsilateral carotid arteries (2, 4, 7, 15, 30 and 45 days after the injury). One-way ANOVA followed by Bonferroni's post test, P<0.05, *significantly different from control group.