I Can See a ‘Brainbow’
New neuroscience reveals that the synaptic connections between the retinal ganglion cells and the visual cortex are not as simple as first thought
Michael Schubert |
It’s well-known that the developing brain starts off with many more connections than it has in adult life, and that some of those connections are strengthened while others are eliminated in a processed called synaptic pruning. In terms of the brain’s visual function, this means that we start out with synaptic connections from many retinal ganglion cells (RGCs) converging on the cells of the lateral geniculate nucleus (LGN) in the thalamus (whereupon signals are relayed to the visual cortex). As we age, the number of connections decreases. Or so we thought.
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