marginally significantp < 0.065
Subfield x cubic DR interactions were significant for CA1 ( p < 0.007), GC-DG ( p < 0.023), and molecular layer ( p < 0.016), with a marginally significant cubic term for CA4 ( p < 0.065); the cubic term did not reach significance for CA2/3 ( p > 0.1), but the quadratic term was significant ( p < 0.029) (Fig. 1b , top; Tables 2 & 3 , right).