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Our findings show that SG projects extensively to the auditory cortex, overlapping the cortical projection field of the modial geniculatc nucleus, and to the immediately neighbouring association cortex. Though the input relationships of SG appear similar to those reported for other mammals, placental and marsupial, a strong SG projection to auditory cortex has not been reported previously. Neocortical relationships of PO are characterised by an orderly point\u2010to\u2010point projection to all but the most rostral parts of the motor\u2010somaesthetic cortex. There is also a substantial projection to the entire posterior parietal association cortex. The PO\u2010neocortex projection is reciprocally organised. The PO\u2010neocortical projection in the possum is similar to that reported in the Virginia opossum, rat, and several other mammals. There is a major difference in organisation in comparison with certain monkeys where the PO projection is much more restricted and does not involve the motor and som\u2010aesthetic cortex. We conclude that PO is similarly organised in many, though not all, mammals, including the marsupials, rodents, insectivores, and prosimian primates. The possum SG, on the other hand, is clearly distinct from other mammals in its extensive projection to auditory cortex, though we cannot say at present whether this a general property of marsupial mammals or a peculiarity restricted to this species and possibly its close relatives.<\/jats:p>","DOI":"10.1002\/cne.902170402","type":"journal-article","created":{"date-parts":[[2005,1,1]],"date-time":"2005-01-01T18:59:46Z","timestamp":1104605986000},"page":"357-375","source":"Crossref","is-referenced-by-count":27,"title":["Neocortical projections of the suprageniculate and posterior thalamic nuclei in the marsupial brush\u2010tailed possum, <i>Trichosurus vulpecula<\/i>(phalangeridae), with a comparative commentary on the organization of the posterior thalamus in marsupial and placental mammals"],"prefix":"10.1002","volume":"217","author":[{"given":"L.","family":"Neylon","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.R.","family":"Haight","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2004,10,9]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/cne.900720303"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/cne.901000307"},{"key":"e_1_2_1_4_1","doi-asserted-by":"crossref","unstructured":"Aitkin L.M. andG.R.Gates(1983)Connections of the auditory cortex of the brushtailed possum Trichosurus vulpecula Brain Behav.Evol. 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