BMP7 expression in the general viscerosensory system (A, B) and special somatosensory system (C–H). Axons in the vestibulocochlear nerve (arrows in F) and ependyma of the fourth ventricle (arrowheads in G and H) were strongly stained. 8n, vestibulocochlear nerve; 10, vagus nucleus; 12, hypoglossal nucleus; DC, dorsal cochlear nucleus; MVe, medial vestibular nucleus; SO, superior olive; Sol, nucleus of the solitary tract; VC, ventral cochlear nucleus. Scale bar = 160 μm for A, C, D; 80 μm for E, G; 40 μm for B, F, H.