Figure 8

PSA-NCAM in the human pre-term newborn rostral medulla oblongata (A-B) and caudal pons (C-E) (case 3). A: left side ventral quadrant showing immunolabelling in the lateral reticular nucleus (LR), inferior olive (IO), pyramidal tract (py), and arcuate nucleus (Ar). B: a positive neuron in the white matter around the inferior olive, which extends long labelled processes towards the nucleus. C: low-power view of the dorsomedial field of the medulla oblongata including the dorsal paramedian nucleus, oral part (ODPM). D: higher magnification of the right side dorsal paramedian nucleus, oral part; arrows point to positive neuronal perikarya. E: modified Mayer's hematoxylin counterstaining of a tissue section semiconsecutive to that shown in C and adjacent to that shown in D; small arrows outline the cytoarchitectonic boundaries of the immunoreactive area shown in D. DPGi, dorsal paragigantocellular nucleus; ml, medial lemniscus; RM, raphe magnus nucleus. Scale bars: A, C, E = 500 μm; B = 20 μm; D = 50 μm.