Scalp-Recorded Frequency-Following Responses in Neonates

Gardi, John N.; Salamy, A.; Mendelson, Terrie

doi:10.3109/00206097909072640

Cited by 43 publications

(31 citation statements)

References 17 publications

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“…smaller t values) at high stimulus intensities than low stimulus intensities. This fi nding is consistent with the effect of stimulus intensity reported in FFR literature (Gardi et al, 1979;Krishnan & Parkinson, 2000). For example, Gardi and colleagues (1979) recorded FFRs to 10-ms tone bursts One interesting fi nding derived from the exponential model is that the asymptotic amplitude of the response (i.e.…”

Section: Exponential Modeling Of the Ffr Trends Of Pitch-encoding In supporting

confidence: 77%

“…The FFR refl ects a small amplitude response, usually on the order of hundreds of nanovolts (Gardi et al, 1979;Krishnan et al, 2004;Jeng et al, 2010;Li & Jeng, 2011), whereas the background noise (physiological and non-physiological) is larger, usually in the range of 10 -20 μ V. Among many possible ways to improve the SNR of a recording, signal averaging is one of the most commonly used approaches in clinics and research laboratories. Signal averaging takes advantage of the time-locked feature between the onset of the stimulus and that of the computer analysis sweeps.…”

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confidence: 99%

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Exponential modeling of human frequency-following responses to voice pitch

Jeng

Chung

Lin

et al. 2011

International Journal of Audiology

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Section: Exponential Modeling Of the Ffr Trends Of Pitch-encoding In supporting

confidence: 77%

mentioning

confidence: 99%

Exponential modeling of human frequency-following responses to voice pitch

Jeng

Chung

Lin

et al. 2011

International Journal of Audiology

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“…There is little literature on the development of the human FFR and none that we are aware of on the development of the speech-evoked FFR. The literature that does exist suggests that infants and adults show similar FFR response properties when elicited by tone bursts (Gardi et al, 1979;Levi et al, 1995). The results of this study indicate that there are significant latency differences between the young and old group with respect to the FFR peaks such that the young group has delayed peak latencies for D, E, and F (F ϭ 8.235, p ϭ 0.005; F ϭ 4.270, p ϭ 0.041; F ϭ 13.520, p Ͻ 0.001, respectively) (Fig.…”

Section: Transient Response Measuresmentioning

confidence: 99%

Developmental Plasticity in the Human Auditory Brainstem

Johnson¹,

Nicol²,

Zecker³

et al. 2008

J. Neurosci.

145

126

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Development of the human auditory brainstem is thought to be primarily complete by the age of ϳ2 years, such that subsequent sensory plasticity is confined primarily to the cortex. However, recent findings have revealed experience-dependent developmental plasticity in the mammalian auditory brainstem in an animal model. It is not known whether the human system demonstrates similar changes and whether experience with sounds composed of acoustic elements relevant to speech may alter brainstem response characteristics. We recorded brainstem responses evoked by both click and speech syllables in children between the ages of 3 and 12 years. Here, we report a neural response discrepancy in brainstem encoding of these two sounds, observed in 3-to 4-year-old children but not in school-age children. Whereas all children exhibited identical neural activity to a click, 3-to 4-year-old children displayed delayed and less synchronous onset and sustained neural response activity when elicited by speech compared with 5-to 12-year-olds. These results suggest that the human auditory system exhibits developmental plasticity, in both frequency and time domains, for sounds that are composed of acoustic elements relevant to speech. The findings are interpreted within the contexts of stimulus-related differences and experience-dependent plasticity.

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“…Adultlike amplitudes were first observed in newborn responses to 10-ms tone bursts (Gardi, Salamy, & Mendelson, 1979). More recent studies have investigated infant responses to speech stimuli.…”

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confidence: 99%

Development of Phase Locking and Frequency Representation in the Infant Frequency-Following Response

Dyke

Lieberman

Presacco

et al. 2017

J Speech Lang Hear Res

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Purpose: This study investigates the development of phase locking and frequency representation in infants using the frequency-following response to consonant-vowel syllables. Method: The frequency-following response was recorded in 56 infants and 15 young adults to 2 speech syllables (/ba/ and /ga/), which were presented in randomized order to the right ear. Signal-to-noise ratio and F sp analyses were used to verify that individual responses were present above the noise floor. Thirty-six and 39 infants met these criteria for the /ba/ or /ga/ syllables, respectively, and 31 infants met the criteria for both syllables. Data were analyzed to obtain measures of phase-locking strength and spectral magnitudes.Results: Phase-locking strength to the fine structure in the consonant-vowel transition was higher in young adults than in infants, but phase locking was equivalent at the fundamental frequency between infants and adults. However, frequency representation of the fundamental frequency was higher in older infants than in either the younger infants or adults. Conclusion: Although spectral amplitudes changed during the first year of life, no changes were found with respect to phase locking to the stimulus envelope. These findings demonstrate the feasibility of obtaining these measures of phase locking and fundamental pitch strength in infants as young as 2 months of age.

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Scalp-Recorded Frequency-Following Responses in Neonates

Cited by 43 publications

References 17 publications

Exponential modeling of human frequency-following responses to voice pitch

Exponential modeling of human frequency-following responses to voice pitch

Developmental Plasticity in the Human Auditory Brainstem

Development of Phase Locking and Frequency Representation in the Infant Frequency-Following Response

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