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Digital photomontage of the hypothalamo-neurohypophysial tract (hnt) of Sapajus spp. Note the UCN3-ir cells in the paraventricular nucleus of the hypothalamus and their stained UCN3 fibers leaving this group of cells in a descending pathway towards the median eminence (ME) and posterior hypophysis through the hypothalamic-pituitary tract, which is visualized bilaterally. Scale bar: 1000 μm.
