Brainstem envelope-following responses can index neural coding of periodicity and envelope

Evidence

Envelope-following responses (EFRs) from the brainstem were elicited in response to two stimulus types—a complex harmonic tone, and a 4 KHz sinusoidal carrier tone modulated at 110 Hz. Both sounds were 100 ms in duration with 5 ms linear onset and offset ramps. The complex harmonic tone had an F0 of 180 Hz and 20 harmonics of equal amplitude and random phase. The modulated tone had a modulation depth of 50 %. Each stimulus was presented with alternating polarities. — Dijk, Pim van, Physiology, Psychoacoustics and…, 4176

Categorization

• DEFINE: EFRs are defined here implicitly as brainstem responses that follow the stimulus envelope, elicited by periodic or modulated tones.