In considering how we can make our RLSOM algorithm more efficient, the idea of focusing the activation spreading around the area of maximum activity was raised (by my PhD student Georgios Pierris). This concept was formalised as 'prioritized sweeping' by Moore and Atkeson in 1993.
Like growing SOMs, this is a concept I would like to explore further.
Moore, A.W., Atkeson, C.G.: Prioritized sweeping: Reinforcement learning with less data and less time. Machine Learning, 13:103–130, 1993.