Short exposure to an enriched environment accelerates plasticity in the barrel cortex of adult rats.

Neuroscience
V RemaF F Ebner

Abstract

Cortical sensory neurons adapt their response properties to use and disuse of peripheral receptors in their receptive field. Changes in synaptic strength can be generated in cortex by simply altering the balance of input activity, so that a persistent bias in activity levels modifies cortical receptive field properties. Such activity-dependent plasticity in cortical cell responses occurs in rat cortex when all but two whiskers are trimmed for a period of time at any age. The up-regulation of evoked responses to the intact whiskers is first seen within 24 h in the supragranular layers [Laminar comparison of somatosensory cortical plasticity. Science 265(5180):1885-1888] and continues until a new stable state is achieved [Experience-dependent plasticity in adult rat barrel cortex. Proc Natl Acad Sci U S A 90(5):2082-2086; Armstrong-James M, Diamond ME, Ebner FF (1994) An innocuous bias in whisker use in adult rat modifies receptive fields of barrel cortex neurons. J Neurosci 14:6978-6991]. These and many other results suggest that activity-dependent changes in cortical cell responses have an accumulation threshold that can be achieved more quickly by increasing the spike rate arising from the active region of the receptive field....Continue Reading

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Citations

Aug 23, 2006·Experimental Brain Research·Heike Sellien, Ford F Ebner
Feb 7, 2007·Annual Review of Neuroscience·Veronica A Alvarez, Bernardo L Sabatini
Jun 22, 2007·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Anubhuthi Goel, Hey-Kyoung Lee
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environmental

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Barrel cortex

Here is the latest research on barrel cortex, a region of somatosensory and motor corticies in the brain, which are used by animals that rely on whiskers for world exploration.

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