Gene expression in the brainstem and cerebellum at PCW 15. (a‐f) RELN expression in brainstem nuclei and cerebellar cortex (CBC). Note the negative expression in cerebellar deep nuclei (CbDN) and strong expression in the hindbrain white matter (HWM). Note also the strong RELN expression in marginal zone (MZ in a) of the hippocampus and subpial granular zone (SG in b) of the cortex. (g) SST expression in the medullar nuclei. Scale bars: 400 μm in (a) for all panels. Abbreviations: 3N, oculomotor nucleus; 7N, facial nucleus; 8Co, cochlear nucleus; 8Ve, vestibular nucleus; 10N, vagal nucleus; Aq, aqueduct; CBV, cerebellar vermis; Cho4V, choroid plexus of fourth ventricle; CM, centromedian nucleus; CnF, cuneiform nucleus; CxIC, cortex of inferior colliculus; DR, dorsal raphe nucleus; DTg, dorsal tegmental nucleus; ECu, external cuneate nucleus; EW, Edinger–Westphal nucleus; GiRt, gigantocellular reticular nucleus; HN, habenular nucleus; icp, inferior cerebellar peduncle; IO, inferior olive; IP, interpeduncular nucleus; LDTg, dorsolateral tegmental nucleus; LLN, nucleus of lateral lemniscus; LP, lateroposterior nucleus; LRt, lateral reticular nucleus; mcp, middle cerebellar peduncle; MiTg, microcellular tegmental nucleus; MnR, median raphe nucleus; MoRF, medullar reticular formation; MRF, midbrain reticular formation; MRt, medial reticular nucleus; NI, nucleus incertus; PB, parabrachial nucleus; PBP, parabrachial pigmented nucleus; PeVA, periventricular area; PIL, posterior intralaminar nucleus; PN, pontine nucleus; PnG, pontine gamma nucleus; PnRF, pontine reticular formation; poc, posterior commissure; PP, peripeduncular nucleus; Pr5, principal sensory nucleus of the trigeminal nerve; PrH, prepositus hypoglossal nucleus; PTN, pretectal nucleus; Pulr, rostral pulvinar; REMS, rostral extramural migration system; RhIS, rhombencephalic isthmus; RN, red nucleus; RtTg, reticular tegmental nucleus; scp, superior cerebellar peduncle; SN, substantia nigra; SOC, superior olivary complex; Sol, solitary nucleus; Sp5, spinal trigeminal nucleus; VPL, ventroposterior lateral nucleus; xscp, decussation of superior cerebellar peduncle