{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,11]],"date-time":"2026-04-11T16:36:07Z","timestamp":1775925367565,"version":"3.50.1"},"reference-count":57,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2004,10,9]],"date-time":"2004-10-09T00:00:00Z","timestamp":1097280000000},"content-version":"vor","delay-in-days":6783,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Comparative Neurology"],"published-print":{"date-parts":[[1986,3,15]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The present paper is devoted to the extrinsic connections of lobe C<jats:sub>3<\/jats:sub> of the highly differentiated corpus cerebelli of the electric fish <jats:italic>Gnathonemus petersi<\/jats:italic>. For this purpose, HRP injections or gels were placed in distinct parts of lobe C<jats:sub>3<\/jats:sub> or its peduncle, in the pretectal region, and in the eye. Moreover, the presence of serotonin and tyrosine\u2010hydroxylase was studied with immunohistochemical methods.<\/jats:p><jats:p>The afferent connections of the rostral and caudal part of lobe C<jats:sub>3<\/jats:sub> appear to differ considerably. Although both parts receive comparable projections from two pretectal nuclei (termed nucleus geniculatus and dorsal anterior pretectal nucleus) and the inferior olive, they receive projections from different parts of the nucleus lateralis valvulae, a large cell mass in the midbrain tegmentum, composed of small, tightly packed neurons. The caudal part of lobe C<jats:sub>3<\/jats:sub> receives a projection from the most rostromedial cap of cells of this nucleus, whereas the rostral cap of lobe C<jats:sub>3<\/jats:sub> receives efferents from the neighboring, more caudolateral, zone of cells of the nucleus lateralis valvulae. The caudal part of lobe C<jats:sub>3<\/jats:sub>, but not its rostral part, receives an additional projection from a nucleus in the isthmus region, termed nucleus Q. This nucleus sends a collateral projection to the torus longitudinalis.<\/jats:p><jats:p>The efferents of both parts of lobe C<jats:sub>3<\/jats:sub> project to slightly different parts of the midbrain tegmentum and the nucleus reticularis superior, and originate at least partly from eurydendroid cells. None of the nuclei and fiber tracts labeled could be shown to contain serotonin or catecholamines.<\/jats:p><jats:p>The connections of lobe C<jats:sub>3<\/jats:sub>, as revealed by the present study, are compared with those of other parts of the mormyrid cerebellum and with those of the corpus cerebelli of other teleosts, with emphasis on the homology and functional significance of pretectocerebellar connections, the topical order in the cerebellar projections of the nucleus lateralis valvulae, and the relations between the cerebellum and torus longitudinalis. Comparison of the cerebellar connections in different teleostean species suggests that the strong development and the considerable differentiation of the cerebellum of mormyrids are related to at least two types of changes in the extrinsic connections, i.e.: (1) a redistribution or parcelling of connections and (2) the development of connections specific for mormyrids.<\/jats:p>","DOI":"10.1002\/cne.902450305","type":"journal-article","created":{"date-parts":[[2005,1,1]],"date-time":"2005-01-01T17:46:29Z","timestamp":1104601589000},"page":"342-358","source":"Crossref","is-referenced-by-count":55,"title":["Afferent and efferent connections of cerebellar lobe C<sub>3<\/sub> of the mormyrid fish <i>Gnathonemus petersi<\/i>: An HRP study"],"prefix":"10.1002","volume":"245","author":[{"given":"J.","family":"Meek","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"R.","family":"Nieuwenhuys","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D.","family":"Elsevier","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.901950303"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00235724"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/cne.901820302"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/cne.902030406"},{"key":"e_1_2_1_6_1","first-page":"399","volume-title":"General Cytochemical Methods","author":"Coons A. 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