Table 1.

Overview of the experimental paradigms and number of animals per group

Experiment number	Experiment type	Acoustic stimuli	Number of animals
			ShamBeads	ShamNaCl	Les L->R	Les R->L
1	FM discrimination acquisition		11*	10	8	8
2	FM discrimination retrieval		5*	0°	6	5
3	Gap detection		12#	0°	9	8
4	Gap duration discrimination		12# (10/2)+	0°	9 (7/2)+	8 (5/3)+
			Σ 23	Σ 10	Σ 23	Σ 21

*Control animals from experiment 2 were included into 1.

#The same animals were used in experiments 3 (training) and 4 (testing).

+Number of animals tested with the first (long) and the second (short) gap stimulus set, respectively.

°Since experiment 1 revealed that there are no differences in behavioral performance between the two sham-lesioned groups, they were pooled for analysis and in subsequent experiments, only Sham_Beads was used.

For further information, see Materials and Methods.