A Late Critical Period for Frequency Modulated Sweeps in the Mouse Auditory System.
auditory cortex
frequency modulated sweep
juvenile development
parvalbumin positive neurons
sensory processing
Journal
Cerebral cortex (New York, N.Y. : 1991)
ISSN: 1460-2199
Titre abrégé: Cereb Cortex
Pays: United States
ID NLM: 9110718
Informations de publication
Date de publication:
14 04 2020
14 04 2020
Historique:
received:
04
06
2019
revised:
23
08
2019
accepted:
17
09
2019
pubmed:
5
12
2019
medline:
19
8
2021
entrez:
5
12
2019
Statut:
ppublish
Résumé
Neuronal circuits are shaped by experience during time windows of increased plasticity in postnatal development. In the auditory system, the critical period for the simplest sounds-pure frequency tones-is well defined. Critical periods for more complex sounds remain to be elucidated. We used in vivo electrophysiological recordings in the mouse auditory cortex to demonstrate that passive exposure to frequency modulated sweeps (FMS) from postnatal day 31 to 38 leads to long-term changes in the temporal representation of sweep directions. Immunohistochemical analysis revealed a decreased percentage of layer 4 parvalbumin-positive (PV+) cells during this critical period, paralleled with a transient increase in responses to FMS, but not to pure tones. Preventing the PV+ cell decrease with continuous white noise exposure delayed the critical period onset, suggesting a reduction in inhibition as a mechanism for this plasticity. Our findings shed new light on the dependence of plastic windows on stimulus complexity that persistently sculpt the functional organization of the auditory cortex.
Identifiants
pubmed: 31800018
pii: 5650920
doi: 10.1093/cercor/bhz262
pmc: PMC7174992
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2586-2599Informations de copyright
© The Author(s) 2019. Published by Oxford University Press.
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