BF organization of rat AC in two animals.

<p>(A) and (B): scatter plot shows the coordinates of recording sites relative to bregma. Each number refers to the BF (in kHz) of a single-unit recorded in the middle cortical layers from an orthogonal penetration. (C) and (D): distribution of BF along the anterior-to-posterior direction obtained from the recordings sites shown in (A) and (B). Solid curve denotes the result of polynomial curve fitting of BF against distance posterior to bregma.