Case studies in neuroscience: cortical contributions to the frequency-following response depend on subcortical synchrony.
J Neurophysiol
; 125(1): 273-281, 2021 01 01.
Article
en En
| MEDLINE
| ID: mdl-33206575
ABSTRACT
Frequency-following responses to musical notes spanning the octave 65-130 Hz were elicited in a person with auditory neuropathy, a disorder of subcortical neural synchrony, and a control subject. No phaselocked responses were observed in the person with auditory neuropathy. The control subject had robust responses synchronized to the fundamental frequency and its harmonics. Cortical onset responses to each note in the series were present in both subjects. These results support the hypothesis that subcortical neural synchrony is necessary to generate the frequency-following response-including for stimulus frequencies at which a cortical contribution has been noted. Although auditory cortex ensembles may synchronize to fundamental frequency cues in speech and music, subcortical neural synchrony appears to be a necessary antecedent.NEW & NOTEWORTHY A listener with auditory neuropathy, an absence of subcortical neural synchrony, did not have electrophysiological frequency-following responses synchronized to an octave of musical notes, with fundamental frequencies ranging from 65 to 130 Hz. A control subject had robust responses that phaselocked to each note. Although auditory cortex may contribute to the scalp-recorded frequency-following response in healthy listeners, our results suggest this phenomenon depends on subcortical neural synchrony.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Sincronización Cortical
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Potenciales Evocados Auditivos
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Pérdida Auditiva Central
Tipo de estudio:
Diagnostic_studies
Límite:
Adult
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Female
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Humans
Idioma:
En
Año:
2021
Tipo del documento:
Article