Table 1.

Responses of FF trajectories to LMAN stimulation with different durations in intact birds and birds with Area X lesions

	Bird ID	Syllable ID number	Stimulus duration
			10 ms	20 ms	50 ms
Intact bird	blk63mgt24	1	–	–	D
	blk93red55	1	U	–	N
	ppl56red81	1	U	–	N
	red56ppl9	1	–	–	D
	ylw62mgt75	1	–	–	U
	org26org79	1	N	N	N
	org92mgt87	1	D	D	D
		2	N	N	N
		3	U	U	U
	ylw20org26	1	–	–	N
		2	U	U	U
	ylw86wht87	1	U	U	U
		2	U	–	N
		3	U	U	U
Lesion bird	ylw25red65	1	N	N	N
		2	–	–	U
	ylw28mgt76	1	U	U	U
		2	U	U	U
	blk92wht33	1	U	U	U
	mgt88wht94	1	U	U	U
		2	U	–	U

D, Downward deflection; U, upward deflection; N, no FF trajectory was measured because LMAN stimulation disrupted the harmonic structure.