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Sequential development of long-term potentiation and depression in different layers of the mouse visual cortex.

Bin B Jiang, Mario M Treviño, and Alfredo A Kirkwood

J Neurosci 27(36):9648-52 (2007) PMID 17804625

Visual deprivation affects the responses of layer IV cells more prominently during early postnatal development, whereas responses in layer II/III remain modifiable until later ages. We examined whether these laminar differences correlate with changes in long-term potentiation (LTP) and long-term depression (LTD) of the ascending pathways to layers IV and II/III in the mouse visual cortex. Our analysis revealed that LTP and LTD in layer IV principal cells is lost shortly after the eyes open, but persists in layers II/III beyond puberty. These results suggest that plasticity proceeds sequentially through cortical layers in a manner that parallels the flow of information during sensory processing.

DOI: 10.1523/JNEUROSCI.2655-07.2007
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