Three studies showed that ASSR increase at 30 Hz (Marchesotti et al., 2020), IGF (Rufener et al., 2023) and IGF + 4 Hz (Baltus et al., 2018) was accompanied by enhanced performance in the auditory gap detection task in healthy participants (Baltus et al., 2018) or improvements in language tasks in patients with dyslexia (Marchesotti et al., 2020; Rufener et al., 2023). Here, IGF1 is linked to dyslexia.