{"fact":"About 20% of the neurons in the crow's NCL specifically respond to the rules of the game, and not just the pictures or sounds used in the game, showing they are thinking about the rules themselves.","context":"In total, 15% (50/336) of all neurons recorded from the NCL encoded only the abstract rule (ANOVA, main factor ‘rule’, no other main factors or interactions, Po0.01, Fig. 7a). An additional 5% (18/336) of all neurons exhibited other main factors in addition to the behavioural rule (significant main factor ‘rule’ and other main factors, no interactions, Fig. 7a).","source":"Lena Veit; Andreas Nieder, Abstract rule neurons in the endbrain support intelligent behaviour in corvid songbirds, 10.1038/ncomms3878","index":216}