FIGURE 1.

Lmx1b and FoxP2 in the rat parabrachial nucleus (PB). Neurons containing cholera toxin b (CTb, green) retrograde labeling after CTb injections into the central nucleus of the amygdala (CeA; a–c) or bed nucleus of the stria terminalis (BST; d–f) did not contain the transcription factor FoxP2 (blue). Neurons containing the transcription factor Lmx1b (red) filled a gap in the FoxP2 distribution (g–i) and were retrogradely labeled after CTb injection into the BST (j–l). Similarly, CTb injection into the CeA (m, rat case #5133) produced retrograde labeling predominantly in Lmx1b‐containing neurons (n). Approximate level caudal to bregma (in mm) is shown at bottom‐left in (m, n). Scale bar is 100 μm and applies to panels (a–l). Abbreviations: mesV, mesencephalic tract and nucleus of the trigeminal nerve; scp, superior cerebellar peduncle