Quantification of c-fos immunolabeling results. The region of interest corresponds approximately to central nucleus of inferior colliculus. Scale bar 500 μ
m. This is a representative sample from a subject stimulated for 90 min with a 2 kHz tone burst. The grid is superimposed to obtain cell counts shown in the lower bar graph. This upper histology image is reproduced from a methods description paper ([26
]; fig. 4) with permission (CC BY-NC-ND license, under Crown Copyright).