Table 1.

Rhodamine-labeled projection neurons that express BDNF mRNA after singing

Birds	RA-projecting cells			Area X-projecting cells
	Double-labeled cells	Rhodamine-labeled cells	%	Double-labeled cells	Rhodamine-labeled cell	%
Bird 1	28	45	62	2	34	6
Bird 2	43	74	58	4	55	7
Bird 3	79	99	80	4	28	14
Bird 4	64	73	88	7	38	18
Total	214	291	73*	17	155	11*

^*This is an average of all four birds. P < 0.05 for both groups, Mann–Whitney test.