Sparse c-Fos labeling was seen in control rats.

<p>Line drawings of brainstem sections showing nuclei immunoreactive to c-Fos after an injection of saline into the temporalis muscle of a rat. Note the minimal c-Fos label in dorsomedial parts of the MDH (A, B, C), the CPA in the cmVLM (A, B, C), lateral medulla (D, E), RVM (F), A5 area (H), and the external lateral, dorsal lateral and internal lateral subnuclei of the parabrachial complex (I, J) from this control animal. Compare to <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0024499#pone-0024499-g003" target="_blank">figures 3</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0024499#pone-0024499-g004" target="_blank">4</a>. Abbreviations: SpVe, spinal vestibular nucleus; SuVe, superior vestibular nucleus; ml, medial lemniscus. See text and previous figures for other abbreviations.