Mean amplitude of RRN in 400–500 ms time window as a function of angle at P3, Pz and P4.

<p>The blue solid line with circle denotes the normal letters in normoxia condition, the red solid line with triangle denotes the normal letters in hypoxia condition, the green dashed line with circle denotes the mirrored letters in normoxia condition, and the black dashed line with triangle denotes the mirrored letters in hypoxia condition.