Complex sentence: Associative synaptic LTD is responsible for selectively enhancing and consolidating specific synaptic modifications, while depressing global ones to sharpen the signal-to-noise ration in human cortical networks.
Split into simpler sentences: Associative synaptic LTD is responsible for selectively enhancing and consolidating specific synaptic modifications, while depressing global ones. This results in a sharpened signal-to-noise ratio in human cortical networks.