The termination of retinal axons in the pretectal region of mammals

Scalia, Frank

doi:10.1002/cne.901450208

Cited by 263 publications

(97 citation statements)

References 25 publications

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“…In mammals DMO has been given many names over the years as Scalia [1972] has recently shown so elegantly. Other authors have re ferred to this aggregate as the 'large-celled nucleus of the optic tract' [Nauta and van Straaten, 1947], 'posterior part of pretectal nucleus' and 'medial nucleus of the optic tract' [H ayhow et al, 1962] etc.…”

Section: Dorsomedial Optic Nucleus (Dmo)mentioning

confidence: 99%

“…It should be added that although DMO appears as only one aggre gate in poikilothermic forms, the possibility exists that the mammalian posterior pretectal nucleus [G iolli and G u th rie, 1969;Scalia, 1972] may also have evolved from the same aggregate that gave rise to the oli vary pretectal nucleus. The proximity and similarity in connections are the strongest evidence for such a hypothesis.…”

Section: Dorsomedial Optic Nucleus (Dmo)mentioning

confidence: 99%

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A Proposal for a Common Nomenclature for some Optic Nuclei in Vertebrates and the Evidence for a Common Origin of Two such Cell Groups

Ebbesson¹

1972

Brain Behav Evol

119

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Comparative studies on the connections of the optic nuclei in a great variety of vertebrates have revealed striking common features. The findings prompted the proposal for a simpler nomenclature which is useful in ordering our present concepts concerning cell groups related to the optic system. The suggested equivalents are summarized below.The dorsomedial optic nucleus (DMO) has previously been called the pretectal area in elasmobranchs, the 'dorsolateral thalamic nucleus' or the 'nucleus pretectalis dorsomedialis' in teleosts, the 'pretectal area' in amphibians, the 'nucleus posterodorsalis' in reptiles, and 'pretectal area' or 'olivary pretectal nucleus' in mammals.The label dorsolateral optic nucleus (DLO) is suggested instead of the 'lateral geniculate nucleus' in elasmobranchs, the visual part of 'dorsal thalamus' in amphibians, 'dorsal lateral geniculate nucleus' in reptiles, ‘nucleus dorsolateralis anterior' in birds, and the 'dorsal nucleus of the lateral geniculate body' in mammals.The ventrolateral optic nucleus (VLO) was formerly not identified in elasmobranchs and was called the 'ventral nucleus of the lateral geniculate body' in reptiles, birds, and mammals.The ventromedial optic nucleus (VMO) is the most ventromedial recipient of retinal fibers (which are usually large) and has earlier been called a variety of names including the 'accessory optic nucleus' in teleosts, the 'ectomammilIary nucleus' in amphibians, reptiles, and birds, and the 'medial terminal nucleus in mammals.The central optic nucleus (CO) characteristically receives no direct retinal fibers but a strong tectal contribution, and it projects to the telencephalon. The nucleus is thought to be incorporated in the DLO in amphibians and elasmobranchs, hence, the label DLOC (dorsolateral optic complex) in these classes. The CO has previously been called the 'nucleus prethalamicus' or 'nucleus rotundus' in teleosts, 'nucleus rotundus' in birds and reptiles, and the 'lateral posterior nucleus' or 'pulvinar' in mammals.Evidence is presented that the DLO and the CO may have evolved from the same aggregate and that the telencephalic regions that are recipients of fibers from DLO-CO may also have evolved from one aggregate. The variation in the parcellation of this system encountered in various vertebrates would then reflect adaptations to selective pressures. Some of the combinations of arrangements that have evolved are described. The significance of variations should become clear with behavioral and electrophysiological analysis.

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Section: Dorsomedial Optic Nucleus (Dmo)mentioning

confidence: 99%

Section: Dorsomedial Optic Nucleus (Dmo)mentioning

confidence: 99%

A Proposal for a Common Nomenclature for some Optic Nuclei in Vertebrates and the Evidence for a Common Origin of Two such Cell Groups

Ebbesson¹

1972

Brain Behav Evol

119

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“…They were described as receiving visual input coming exclusively from the contralateral eye, as in some other mammalian species [rats and rabbits -Scalia, 1972;rats -Scalia and Arango, 1979;mice -Pak et al, 1987]. Later, Linden and Rocha-Miranda [1981] redefined the NOT in Didelphis marsupialis aurita, proposing the existence of a 'sub-brachial' portion characterized by bilat eral retinal inputs and ipsilateral striate cortical afferents.…”

Section: Introductionmentioning

confidence: 99%

The Nucleus of the Optic Tract (NOT) and the Dorsal Terminal Nucleus (DTN) of Opossums <i>(Didelphis marsupialis aurita)</i>

Vargas¹,

Volchan²,

Nasi³

et al. 1996

Brain Behav Evol

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Wheat germ agglutinin conjugated to horseradish peroxidase (WGA-HRP) was injected unilaterally into the pretectocollicular region of opossums (Didelphis marsupialis aurita), primarily to investigate the existence of a commissural subcortical pathway but also to reveal afferents and efferents of the nucleus of the optic tract (NOT) and dorsal terminal nucleus (DTN) in this species. Labelled cells and terminals were observed in the contralateral NOT-DTN. Furthermore, HRP was injected bilaterally in the region of the inferior olive (IO) to verify if the distribution of labelled cells in the NOT-DTN overlapped the region of commissural labelled cells. The two subpopulations of retrogradely labelled cells coincided, being distributed within the retinal terminal field attributed to the NOT-DTN, as revealed by contralateral eye injections of HRP. The commissural cells were located slightly more ventral than the olivary cells in the optic tract. The pretectocollicular WGA-HRP injections also labelled cells and terminals bilaterally in the lateral terminal nucleus (LTN), interstitial nucleus of the superior fasciculus, posterior fibers (INSFp), ventral lateral geniculate nucleus (vLGN), and superior colliculus (SC) and ipsilaterally in the medial terminal nucleus (MTN). In addition, further caudally, labelled cells and terminals were observed bilaterally in the nuclei prepositus hypoglossi (PH) and in the medial (MVN) and lateral (LVN) vestibular nuclei. Labelled terminals were found in the ipsilateral nucleus reticularis tegmenti pontis (NRTP) and in the IO with ipsilateral predominance. This study allowed an anatomical delimitation of the NOT-DTN in this opossum species, as defined by the olivary and commissural subpopulations, as well as a hodological evaluation of this region. The existence of some common anatomical aspects with other mammalian species is discussed.

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“…1996]. In mammals, the correspondent of LMpc and GT in turtles must occur within the posterior pretectal nucleus, since this appears to be the major remaining retinorecipient nucleus in mammals [Scalia, 1972;Kanaseki and Sprague, 1974;Scalia and Arango, 1979: Weber. I985|.…”

Section: Comparisons To Previous Findings In Mammalsmentioning

confidence: 99%

Use of the Sensitive Anterograde Tracer Cholera Toxin Fragment B Reveals New Details of the Central Retinal Projections in Turtles; pp. 322–337

1996

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Previous anterograde degeneration and autoradiographic studies have yielded inconsistent results on the extent and target areas of the central retinal projections in turtles. We used the highly sensitive anterograde and retrograde tracer, cholera toxin B fragment (CTB), to re-examine the central retinal projections in Pseudemys scripta elegans. In contrast to the results of the previous anterograde degeneration studies and autoradiographic studies, immunohistochemical detection of CTB-labeled central retinal axons and terminals revealed these projections with great morphological detail and clarity. In addition, the CTB labeling revealed much more extensive projections than previously realized to all known major retinorecipient areas, particularly in the dorsal and ventral lateral geniculate nuclei, the pretectal region, the nucleus of the basal optic root and the optic tectum. Although the contralateral projections were always much more extensive, ipsilateral projections were clearly present (and in some cases abundant) in all previously known retinorecipient areas. In addition, prominent contralateral (and lesser ipsilateral) retinal projections to several novel target, including the basal hypothalamus, the perirotundal nuclei, the suprapeduncular nucleus and the region between the pretectal nuclei and the tegmentum, were observed. Our results suggest that the use of CTB as a tracer to examine central retinal projections in diverse other species will show that central retinal projections are much more widespread and extensive than previously realized.

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The termination of retinal axons in the pretectal region of mammals

Cited by 263 publications

References 25 publications

A Proposal for a Common Nomenclature for some Optic Nuclei in Vertebrates and the Evidence for a Common Origin of Two such Cell Groups

A Proposal for a Common Nomenclature for some Optic Nuclei in Vertebrates and the Evidence for a Common Origin of Two such Cell Groups

The Nucleus of the Optic Tract (NOT) and the Dorsal Terminal Nucleus (DTN) of Opossums <i>(Didelphis marsupialis aurita)</i>

Use of the Sensitive Anterograde Tracer Cholera Toxin Fragment B Reveals New Details of the Central Retinal Projections in Turtles; pp. 322–337

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