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Through lateral connections, a Hebbian learning rule, and approximate initialization, Cuppini et al. manage to learn register between sensory maps. This can be seen as an implementation of a SOM.

Cuppini et al. do not evaluate their model's performance (comparability to cat/human performance, optimality...)

The SC model presented by Cuppini et al. has a circular topology to prevent the border effect.

If visual cues were absolutely necessary for the formation of an auditory space map, then no auditory space map should develop without visual cues. Since an auditory space map develops also in blind(ed) animals, visual cues cannot be strictly necessary.

Many localized perceptual events are either only visual or only auditory. It is therefore not plausible that only audio-visual percepts contribute to the formation of an auditory space map.

Visual information plays a role, but does not seem to be necessary for the formation of an auditory space map.

The auditory space maps developed by animals without patterned visual experience seem to be degraded only in some species (in guinea pigs and barn owls, but not in ferrets or cats).

Self-organization may play a role in organizing auditory localization independent of visual input.

Visual input does seem to be necessary to ensure spatial audio-visual map-register.