Check out the newest Neuroforum issue of the German Neuroscience Society and learn more about the members of the MODOLFOR research unit 5424 "Modulation in Olfaction" and their scientific interests (in German):
nwg-info.de/sites/nwg-in...
MODOLFOR
2/7 Odour representations became substantially less correlated from input to output. Response variance was preserved, dimensionality increased, and output activity occupied a higher-dimensional space.
Thus, the bulb decorrelates odour representations without simply suppressing activity.
6/7 These findings reframe how we think about early olfactory processing.
Rather than relying primarily on complex recurrent circuitry, much of olfactory bulb decorrelation may emerge from scalable feedforward gain control, with lateral interactions further refining representations.
5/7 The model suggests a simple principle:
Channels carrying unique information are amplified, while redundant channels are attenuated.
This feedforward scaling mechanism alone reproduced a substantial fraction of the experimentally observed decorrelation.
