Spatial-temporal patterns of retinal waves underlying activity-dependent refinement of retinofugal projections.
Spatial-temporal patterns of retinal waves underlying activity-dependent refinement of retinofugal projections.
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DOI:
10.1016/j.neuron.2009.09.021
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发表时间:
2009-10-29
期刊:
影响因子:
16.2
通讯作者:
Feldheim, David A.
中科院分区:
文献类型:
--
作者:
Stafford, Ben K.;Sher, Alexander;Litke, Alan M.;Feldheim, David A.
During development, retinal axons project coarsely within their central visual targets before refining to form precisely organized synaptic connections. Spontaneous retinal activity, in the form of acetylcholine-driven retinal waves, is widely proposed to be necessary for establishing these precise projection patterns. In particular, both axonal terminations of retinal ganglion cells (RGCs) and the size of receptive fields of neurons in visual areas of the brain are larger in mice that lack the β2 subunit of the nicotinic acetylcholine receptor (β2KO). Here, using a large-scale, high-density multi-electrode array to record single-unit activity from hundreds of RGCs simultaneously, we present analysis of early post-natal retinal activity from both wild type (WT) and β2KO retinas. We find that β2KO retinas have correlated patterns of activity, but many aspects of these patterns differ from those of WT retina. Quantitative analysis of these differences suggests that wave directionality, coupled with short-distance correlated bursting patterns of RGCs, work together to drive refinement of retinofugal projections.
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