Tone-detection training enhances spectral integration mediated by intracortical pathways in primary auditory cortex

- We trained adult rats to detect a 5 kHz target tone to receive a food reward.
- Training altered target-evoked CSD profiles at the 10 kHz site in A1.
- Target-evoked responses were enhanced in layer 2/3 but not layer 4.
- Each rat's performance correlated with amplitude of target-evoked current sink.
- We conclude that plasticity along intracortical pathways is important for auditory learning.