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Examples of c-fos immunostaining in the AVCN of normal control (A), 4 h (B), or 24 h (C) after noise exposure, and 24 h after noise exposure plus treatment (D). More c-fos-positive cells were observed in the AVCN after in noise-exposed animals (arrows in B and C) than were observed in the AVCN of noise-exposed animals that were subsequently treated with antioxidants (arrow in D). Scale bar = 200 μm in D for A–D.
