http://science.sciencemag.org/content/356/6345/1352
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Abstract
Circuits
in the auditory cortex are highly susceptible to acoustic influences
during an early postnatal critical period. The auditory cortex
selectively expands neural representations of enriched acoustic stimuli,
a process important for human language acquisition. Adults lack this
plasticity. Here we show in the murine auditory cortex that juvenile
plasticity can be reestablished in adulthood if acoustic stimuli are
paired with disruption of ecto-5′-nucleotidase–dependent adenosine
production or A1–adenosine receptor signaling in the auditory
thalamus. This plasticity occurs at the level of cortical maps and
individual neurons in the auditory cortex of awake adult mice and is
associated with long-term improvement of tone-discrimination abilities.
We conclude that, in adult mice, disrupting adenosine signaling in the
thalamus rejuvenates plasticity in the auditory cortex and improves
auditory perception.
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