A, An NTS baroreceptor second-order neuron A, An NTS baroreceptor second-order neuron. a, The neuron viewed with infrared differential interference contrast (IR-DIC). b, The labeled aortic depressor nerve boutons viewed with fluorescence filter set. c, Overlay of the IR-DIC and fluorescence images. ... A, An NTS baroreceptor second-order neuron. a, The neuron viewed with infrared differential interference contrast (IR-DIC). b, The labeled aortic depressor nerve boutons viewed with fluorescence filter set. c, Overlay of the IR-DIC and fluorescence images. d, Neuron with patch electrode in whole-cell configuration. Scale bar, 10 μm. B, Photomicrograph shows the position of the recording electrode. TS, Tractus solitarius. Scale bar, 200 μm. Chao-Yin Chen et al. J. Neurosci. 2009;29:2754-2761 ©2009 by Society for Neuroscience