Corticoseptal projections in the snakes Natrix sipedon and Thamnophis sirtalis

Ulinski, Philip S.

doi:10.1002/cne.901640308

Cited by 37 publications

(7 citation statements)

References 14 publications

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“…First, the Timm-positive innervation of the reptilian septum seems to be much more important than the mammalian one (Haug, 1973). This fact is correlated with differences between the corticoseptal (hippocamposeptal) connections of reptiles (Ulinski, 1975;Martinez-Garcia and Olucha, 1988;Olucha et al, 1988;Vermeulen Van der Zee, 1989, 1993) and mammals (see Swanson and Cowan, 1979) and is further discussed in the next paper in this series. The second difference deals with the mammalian medial septal nucleus.…”

Section: Comparative Aspects Of the Organization Of The Septal Complexmentioning

confidence: 80%

The septal complex of the telencephalon of the lizard Podarcis hispanica. I. chemoarchitectonical organization

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Hoogland

Zee

et al. 1995

J of Comparative Neurology

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In this paper we study the septal complex architecture in the lizard Podarcis hispanica (Lacertidae). Histochemical and immunohistochemical techniques were used to define the distribution of zinc (Timm stain), acetyl cholinesterase (AChase), gamma-aminobutyric acid (GABA), tyrosine hydroxylase (TH), dopamine (DA), serotonin (5-HT), and two neuropeptides: leu-enkephalin (L-ENK) and substance P (SP). These reactions delineate a coherent map of nine septal nuclei that are named with a topographical nomenclature: anterior, lateral, ventromedial, medial, dorsolateral, ventrolateral, and dorsal septal nuclei, nucleus septalis impar, and nucleus of the posterior pallial commissure. The anterior septal nucleus is characterized by intense reaction for zinc and the presence of fibers immunoreactive for GABA, 5-HT, and L-ENK, which form pericellular nests. The lateral septal nucelus shows intense reaction for zinc, a high density of GABA-immunoreactive cells, and L-ENK-immunoreactive fibers forming basketlike figures around unstained somata. The ventromedial septal nucleus shows intense AChase reactivity, a dense network of 5-HT-immunoreactive fibers, and virtually no labeling for the other histochemical stains. The medial septal nucleus is defined by heavy reactivity for zinc, dense DA/TH and L-ENK innervations, and the presence of L-ENK-immunoreactive cells. The dorsolateral septal nucleus shows intense AChase staining in the neuropile and a dense network of fibers immunoreactive for 5-HT and DA/TH, but it shows low staining for zinc. The ventrolateral septal nucleus shows L-ENK-immunoreactive cells and a dense L-ENK innervation, but low reactivity for zinc. The dorsal septal nucleus, intermingled with the fimbrial fibers, shows a dense population of GABA-immunoreactive cells and terminals, but it is unreactive for zinc. Two subdivisions can be established in this dorsal septal nucleus: the dorsal part, intensely reactive for AChase and innervated by 5-HT fibers, and the central part, which shows L-ENK-immunoreactive neurons and fibers without reactivity for either AChase or 5-HT. The nucleus septalis impar, traversed by the fibers of the anterior pallial commissure (mildly reactive for zinc), shows reaction for AChase but low (if present) reactivity for the remaining markers. The nucleus of the posterior pallial commissure shows a generally low reactivity for the histochemical reactions employed. The distribution of these markers is similar to that found in other squamate reptiles and allows for a direct comparison with the septal formation of mammals. Such a comparison reinforces the view that the limbic system has undergone a conservative evolution within vertebrates.

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Section: Comparative Aspects Of the Organization Of The Septal Complexmentioning

confidence: 80%

The septal complex of the telencephalon of the lizard Podarcis hispanica. I. chemoarchitectonical organization

Font

Hoogland

Zee

et al. 1995

J of Comparative Neurology

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“…The dorsal cortex is similar to the dorsal pallium in having reciprocal connections with the medial cortex and septal nuclei, and in receiving afferents from the diagonal band nucleus (Lohman and Mentink, 1972;Ulinski, 1975;Butler, 1976;van Woerden-Verkley, 1976, 1978;Halpern, 1980;Bruce, 1982;Bruce and Butler, 1984b;Desan, 1984). However, it differs significantly from the dorsal pallium with respect to olfactory relationships, commissural connections, thalamic afferents, functional organization, and both striate and extra telencephalic connections:…”

Section: Dorsal Cortexmentioning

confidence: 96%

“…It receives a limited, rostral input from the main olfactory bulb (Northcutt, 1970b;Rolon and Skeen, 1980;Reiner and Karten, 1985) and projects to the opposite medial cortex (Voneida and Ebbesson, 1969;Lohman and Mentink, 1972;Bruce andButler, 1984b). The medial cortex has reciprocal connections with the ipsilateral dorsal and lateral cortices, and with the septal area, including the diagonal band nucleus (Lohman and Mentink, 1972;Ulinski, 1975Ulinski, , 1976Butler, 1976;Lohman and van Woerden-Verkley, 1976;Halpern, 1980;Sligar and Voneida, 1981;Bruce and Butler, 1984b;Desan, 1984). It receives input from an isthmal raphe nucleus (Lohman and van Woerden-Verkley, 1978;Bruce and Butler, 1984b) and from at least one rostral dorsal thalamic group, the nucleus dorsolateral is anterior (DLA; Lohman and van WoerdenVerkley, 1978;Bruce and Butler, 1984b;Desan, 1984).…”

Section: Medial Cortexmentioning

confidence: 97%

The Pallium of Anuran Amphibians

Neary

1990

Comparative Structure and Evolution of Cerebral Cortex, Part I

127

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“…Efferent projections of the dorsal cortex have been found in various reptiles to the septum and hypothalamus [Northcutt, 1970;L ohman and M entink, 1972;U linski, 1975;H alpern, 1976;L ohman and V an W oerden-V erkley, 1976], the dorsal ventricular ridge [N orthcutt, 1970; H alpern, 1976; L ohman and V an W oerden-V erkley, 1976], the anterior group of thalamic nuclei [Northcutt, 1970;H alpern, 1976], and the dorsal lateral geniculate nucleus [Northcutt, 1970;H all and E bner, 1974;W are, 1974].…”

Section: Dorsal Cortexmentioning

confidence: 99%

Telencephalon of the Lizard Gekko gecko (Linnaeus): Some Connections of the Cortex and Dorsal Ventricular Ridge

Butler¹

1976

Brain Behav Evol

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Interhemispheric connections of the telencephalon in the lizard, Gekko, were studied with anterograde degeneration methods following lesions variously placed in the medial, dorsal, and lateral cortices and/or the dorsal ventricular ridge (DVR). After lesions involving dorsal cortex, the medial wall, and the DVR, the majority of degenerated fibers decussate in the hippocampal commissure and terminate in the septum, medial wall, dorsal cortex, and the lateral edge of the DVR contralaterally. Lesions confined to dorsal cortex result in a similar pattern of degeneration, while lesions confined to the lateral wall result in degeneration in the contralateral lateral cortex, DVR, and striatum, mainly via the anterior commissure. Some variation has been reported on the pattern of interhemispheric projections among reptiles studied to date; two possible interpretations of the data are that (1) dorsal cortex may be homologous as a field to parts of both neocortex and the hippocampal formation of mammals or (2) only the lateral part of dorsal cortex may be homologous to neocortex.

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Corticoseptal projections in the snakes Natrix sipedon and Thamnophis sirtalis

Cited by 37 publications

References 14 publications

The septal complex of the telencephalon of the lizard Podarcis hispanica. I. chemoarchitectonical organization

The septal complex of the telencephalon of the lizard Podarcis hispanica. I. chemoarchitectonical organization

The Pallium of Anuran Amphibians

Telencephalon of the Lizard <i>Gekko gecko </i>(Linnaeus): Some Connections of the Cortex and Dorsal Ventricular Ridge

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