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. 2014 Oct 14;9(10):e109334. doi: 10.1371/journal.pone.0109334

Table 1. Association between neuronal activation, stack calls and song in 26 units in 25 pairs.

song
associated no association not present total
associated 16 0 7 23
stack no association 1 0 2 3
not present 0 0 0 0
total 17 0 9 26

Out of 17 units where both stacks and song were present in sufficient quantity to permit statistical analysis, 16 had firing patterns that were associated both with stacks and song.