A cobalt-lysine study of primary olfactory projections in king salmon fry (Oncorhynchus tshawytscha Walbaum)

Bazer, Gary T.; Ebbesson, Sven O. E.; Reynolds, James B.; Bailey, Raymond P.

doi:10.1007/bf00216475

Cited by 37 publications

(24 citation statements)

References 11 publications

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“…However, because in our experiments DiI was applied to an olfactory nerve, which also contains fibers of the terminal nerve system, the labeled extrabulbar processes probably include both olfactory and terminal nerve components. The targets of the olfactory nerve fibers revealed after DiI application to an olfactory nerve are in agreement with the results of previous studies in salmonids with tract tracing methods and immunocytochemical markers (Bazer et al, 1987;Riddle and Oakley, 1992;Becerra et al, 1994;Anadón et al, 1995). Efferent projections from the olfactory epithelium were predominantly distributed in the glomerular layer of the olfactory bulb, but several extrabulbar primary olfactory/terminal nerve projections also reached the ventral area of the telencephalon, the preoptic region, and the posterior tubercle.…”

Section: Olfactory Telencephalon Of the Troutsupporting

confidence: 88%

“…In contrast with these numerous neurochemical studies, there have been very few hodological studies. There have been some neuroanatomical studies on the primary and secondary projections of the olfactory system in salmonids (Northcutt and Davis, 1983;Bazer et al, 1987;Anadón et al, 1995;Matz, 1995) but no comprehensive studies of the connectivity of the salmonid telencephalon. To expand our understanding of the organization of the telencephalon in salmonids, the connections of the different telencephalic nuclei and zones were examined using the 1,1Ј-dioctadecyl 3,3,3Ј,3Ј-tetramethylindocarbocyanine perchlorate (DiI) tracing technique with the aim of integrating as far as possible the results on afferent and efferent telencephalic projections with existing neurochemical data in salmonids.…”

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confidence: 98%

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An experimental study of the connections of the telencephalon in the rainbow trout (Oncorhynchus mykiss). I: Olfactory bulb and ventral area

Folgueira

Anadón

Yáñez

2004

J of Comparative Neurology

123

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The fluorescent carbocyanine dye 1,1'-dioctadecyl 3,3,3',3'-tetramethylindocarbocyanine perchlorate (DiI) was used in fixed tissue to comprehensively analyze the connections of the olfactory bulbs and the different regions of the ventral (V) area of the telencephalic lobes (subpallium) of the rainbow trout. With this goal, DiI was applied to the different telencephalic nuclei and zones, as well as to the olfactory nerve, the olfactory bulb, the retina, and to several structures in the diencephalon and brainstem of juvenile trout. The olfactory bulbs maintain reciprocal connections with several regions of the telencephalon [ventral nucleus of V (Vv), supracommissural nucleus (Vs), posterior zone of D (Dp), preoptic nucleus], and also project to the diencephalon (posterior tuberal nucleus, posterior hypothalamic lobe). Vv receives afferents from Vs, the dorsal nucleus of V (Vd), the preoptic nucleus, and from several nuclei in the diencephalon and brainstem (suprachiasmatic nucleus, anterior and lateral tuberal nuclei, preglomerular complex, tertiary gustatory nucleus, posterior tubercle, inferior hypothalamic lobes, thalamus, torus semicircularis, secondary gustatory nucleus, locus coeruleus, superior raphe nucleus, central gray, and reticular formation), and projects to dorsal (pallial) regions and most of the nuclei afferent to Vv. The dorsal nucleus of V (Vd) and Vs mainly project to the dorsal area. In an accompanying article (Folgueira et al., 2004), we present the results of application of DiI to dorsal (pallial) telencephalic regions, as well as of several experiments of tracer application to extratelencephalic regions. The results presented here, together with those of the accompanying article, reveal a complex connectional pattern of the rainbow trout ventral telencephalon, most of these connections having not been described previously in salmonids.

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Section: Olfactory Telencephalon Of the Troutsupporting

confidence: 88%

mentioning

confidence: 98%

An experimental study of the connections of the telencephalon in the rainbow trout (Oncorhynchus mykiss). I: Olfactory bulb and ventral area

Folgueira

Anadón

Yáñez

2004

J of Comparative Neurology

123

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“…Based on these criteria, von reported that a terminal nerve also existed in lampreys and in birds. Shortly thereafter, however, some investigators noted that markers, believed at the time to be specific for primary olfactory fibers, also labeled some extrabulbar projections that bypassed the glomeruli and ended in the ventral telencephalon or in the diencephalon (Anadon et al, 1995;Bazer et al, 1987;Becerra et al, 1994;Meyer, 1992, 1995;Honkanen and Ekström, 1990;Riddle and Oakley, 1992;Szabo et al, 1991a;see Table 1). It was suggested that these projections may derive from otherwise "regular" olfactory receptor cells and thus may constitute primary olfactory fibers rather than terminal nerve fibers (Szabo et al, 1991a).…”

Section: Introductionmentioning

confidence: 93%

The terminal nerve and its relation with extrabulbar “olfactory” projections: Lessons from lampreys and lungfishes

Bartheld

2004

Microscopy Res & Technique

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The definition of the terminal nerve has led to considerable confusion and controversy. This review analyzes the current state of knowledge as well as diverging opinions about the existence, components, and definition of terminal nerves or their components, with emphasis on lampreys and lungfishes. I will argue that the historical terminology regarding this cranial nerve embraces a definition of a terminal nerve that is compatible with its existence in all vertebrate species. This review further summarizes classical and more recent anatomical, developmental, neurochemical, and molecular evidence suggesting that a multitude of terminalis cell types, not only those expressing gonadotropin-releasing hormone, migrate various distances into the forebrain. This results in numerous morphological and neurochemically distinct phenotypes of neurons, with a continuum spanning from olfactory receptor-like neurons in the olfactory epithelium to typical large ganglion cells that accompany the classical olfactory projections. These cell bodies may lose their peripheral connections with the olfactory epithelium, and their central projections or cell bodies may enter the forebrain at several locations. Since "olfactory" marker proteins can be expressed in bona fide nervus terminalis cells, so-called extrabulbar "olfactory" projections may be a collection of disguised nervus terminalis components. If we do not allow this pleiomorphic collection of nerves to be considered within a terminal nerve framework, then the only alternative is to invent a highly species- and stage-specific, and, ultimately, thoroughly confusing nomenclature for neurons and nerve fibers that associate with the olfactory nerve and forebrain.

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“…According to the descriptions/chartings given by the authors, it appears that six studies have dealt with specimens displaying our "r"-pattern (Terlou and Ekengren 1979;Billard and Peter 1982;Shiga et al 1985;Schäfer et al 1989;Amano et al 1991;Peter et al 1991). The other studies could not be compared due to the insufficiently precise information given (Goos and Murathanoglu 1977;Terlou et al 1978;Dubois et al 1979;Oka et al 1986;Bazer et al 1987;Vecino et al 1989;Corujo and Anadon 1990;Olivereau and Olivereau 1990;Östholm et al 1990;Holmqvist and Ekström 1991;Holmqvist and Carlberg 1992;Matz and Takahashi 1994;Matz 1995;Nevitt et al 1995;Parhar et al 1995;Kudo et al 1996).…”

Section: Previous Studiesmentioning

confidence: 92%

Intrasexual and intersexual dimorphisms of the red salmon prosencephalon

Jadhao

D’Aniello

Malz

et al. 2001

Cell and Tissue Research

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Intrasexual as well as intersexual dimorphisms were found in the prosencephalon and mesencephalon of adult Oncorhynchus nerka (red/sockeye salmon). These dimorphisms are concerned with the position of the preoptic nucleus, nucleus lateralis tuberis, habenula, third ventricle, tectal ventricles, preoptic recess, recessus lateralis, horizontal commissure, posterior commissure, and toral commissure. The intrasexual dimorphism was characterized by either a rostral ("r"-pattern) or a caudal ("c"-pattern) position of the preoptic region as well as varying locations of other structures within the prosencephalon. As compared to "c"-pattern fish, the preoptic nucleus and nucleus lateralis tuberis were located more rostral, and the habenula was positioned further caudal, in "r"-type animals. The intersexual dimorphism was also characterized by different positions of the structures listed above. With the exception of the preoptic nucleus, all of these were located further rostral in "r"-pattern females than in type "r" males. In "c"-pattern females, they were positioned further caudal than in type "c" males. The number of neurons in the parvocellular and in the magnocellular portion of the preoptic region differed in the two genders with respect to "r"- as well as "c"-pattern fish. Males had more neurons than females in both the magno- and the parvocellular subdivisions of the preoptic region. In "r"- and "c"-pattern fish, the average size of magnocellular preoptic neurons was larger in females than in males. The observed intersexual variations may reflect gender-specific differences in the control of the pituitary. Functional correlates of intrasexual dimorphism are obscure.

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A cobalt-lysine study of primary olfactory projections in king salmon fry (Oncorhynchus tshawytscha Walbaum)

Cited by 37 publications

References 11 publications

An experimental study of the connections of the telencephalon in the rainbow trout (Oncorhynchus mykiss). I: Olfactory bulb and ventral area

An experimental study of the connections of the telencephalon in the rainbow trout (Oncorhynchus mykiss). I: Olfactory bulb and ventral area

The terminal nerve and its relation with extrabulbar “olfactory” projections: Lessons from lampreys and lungfishes

Intrasexual and intersexual dimorphisms of the red salmon prosencephalon

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