Topologic and connectional analysis of the dorsal thalamus of Triturus alpestris (Amphibia, Urodela, Salamandridae)

Wicht, Helmut; Himstedt, Werner

doi:10.1002/cne.902670408

Cited by 63 publications

(47 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, such a projection was not revealed by injection of HRP and HRP-wheat germ agglutinin (WGA) (L. fluviatilis; Polenova and Vesselkin, 1993). Projections from the nucleus dorsalis thalami to the striatum have been shown in amphibians (Wilczynski and Northcutt, 1983;Wicht and Himstedt, 1988;Dubé et al, 1990;Gonzá-lez et al, 1994c;Marín et al, 1997a) and reptiles (Parent, 1976;Lohman and van Woerden-Verkley, 1978;Gonzá lez et al, 1990). The thalamic intralaminar nucleus in mammals sends a prominent projection to the striatum, whereas a minor input is provided by the lateral posterior/pulvinar complex (see Butler, 1994).…”

Section: Striatal Afferents From the Dorsal Thalamusmentioning

confidence: 95%

Afferents of the lamprey striatum with special reference to the dopaminergic system: A combined tracing and immunohistochemical study

1997

View full text Add to dashboard Cite

The origin of afferents to the striatum in lamprey (Lampetra fluviatilis) was studied by using fluorescein-coupled dextran-amines (FDA). Injection of FDA into the striatum retrogradely labeled several cell populations in the forebrain and the rostral rhombencephalon. No retrograde labeled cells were seen in the mesencephalon. A dopamine-specific antiserum was used to determined the distribution of dopaminergic perikarya and fibers. Many dopamine-immunoreactive (DA-ir) fibers were present throughout the brain, but the highest density of labeled fibers was in the mediobasal prosencephalon, especially in the striatum, the lateral hypothalamic area, and the neurohypophysis. Most DA-ir cells were located in the mediobasal diencephalon (preoptic region, nucleus commissurae postopticae, hypothalamus, and nucleus tuberculi posterioris). In the mesencephalon, only a few immunopositive cells were observed in the tectum opticum. In the rhombencephalon, DA-ir cells were observed in the isthmic region, dorsally to the descending trigeminal tract, and caudally to the posterior rhombencephalic reticular nucleus. The rostralmost spinal cord received many descending DA-ir fibers from the brainstem. Along the spinal cord, DA-ir neurons were also found, some of which projected to the medioventral surface, forming a prominent plexus. On the basis of double-labeling experiments, it is shown that the dopaminergic input to the striatum originates from the nucleus tuberculi posterioris. Thus, the striatum receives inputs from different structures, including a strong dopaminergic innervation from the diencephalon. Much of the dopaminergic system in Lampetra fluviatilis is basically similar to that seen in some teleosts, but it presents differences with other anamniote (elasmobranch) as well as amniote groups.

show abstract

Section: Striatal Afferents From the Dorsal Thalamusmentioning

confidence: 95%

Afferents of the lamprey striatum with special reference to the dopaminergic system: A combined tracing and immunohistochemical study

1997

View full text Add to dashboard Cite

show abstract

“…Fur thermore, while in most vertebrates almost the entire dorsal thalamus projects heavily to the telencephalon [e.g. see Neary and Northcutt, 1983;Wicht and Himstedt, 1988;Fiebig and Bleckmann, 1989;Wicht and Northcutt, 1989], in teleosts only some parts of the dorsal thalamus seem to project to the telencephalon (see above), and even these connections are difficult to label with even the most sensitive current tech niques.…”

Section: Comparisons To Ollier Vertebratesmentioning

confidence: 99%

The Diencephalon of the Channel Catfish, Ictalurus punctatus

Striedter

1990

Brain Behav Evol

112

View full text Add to dashboard Cite

In a companion paper, the nuclear organization of the diencephalon of the channel catfish, Ictalurus punctatus, was described and compared to that of other teleosts. The present paper describes the connections of the diencephalon with the retina, optic tectum, corpus of the cerebellum and telencephalon. The principal tracer employed is the indocarbocyanine dye DiI which diffuses along neuronal membranes in fixed tissues. Almost all of the nuclei that were recognized as distinct in the companion study are found to also exhibit distinct sets of connections. Most of these connections have not been described previously in catfishes or other teleosts. When combined with connectional data from the existing literature, the results of the present study allow one to recognize a great number of distinct pathways through the diencephalon of channel catfish, including several visual, auditory, gustatory, electrosensory and mechanosensory pathways to the telencephalon. Almost all of the species differences in diencephalic organization noted in the companion study can be accounted for by changes in one of the major sensory pathways. In contrast, the multimodal and integrative areas of the diencephalon appear to be relatively conservative. A comparison between the diencephalon of teleosts and that of other vertebrates suggests that the dorsal thalamus, the ventral thalamus and the posterior tuberculum are homologous, at least in part, to the dorsal thalamus, the zona incerta and the subthalamic nucleus of mammals, respectively. All three areas project to the telencephalon in both mammals and teleosts. In most vertebrates, however, the dorsal thalamus provides the dominant input to the telencephalon, whereas in teleosts the main telencephalic input derives instead from the posterior tuberculum.

show abstract

“…Knowledge of striatal afferents in urodeles is derived from the work of Kokoros and Northcutt on Ambystoma tigrinum [13], in which the origin of degenerated fibers in the thalamus and mesen cephalic tegmentum after large telencephalic lesions was attributed to the corpus striatum. Recently, Wicht and Himstedt [14] have shown that the thalamostriatal projection originates specifically from the posterodorsal thalamus in Triturus alpestris. In the present study, afferent connections to the corpus striatum have been investigated by retrograde horseradish per oxidase (HRP) transport in a representative urodele, the newt Triturus cristatus.…”

Section: Introductionmentioning

confidence: 99%

Striatal Afferents in the Newt Triturus cristatus

1990

View full text Add to dashboard Cite

In order to investigate the neuronal populations projecting to the corpus striatum in the brain of a urodele, Triturus cristatus, horseradish peroxidase (HRP) retrograde labeling was used in parallel with anterograde degeneration, glyoxylic acid histofluorescence and behavioral testing. Striatal injections of HRP revealed that the main striatal afferent systems originate within the diencephalon, specifically in the dorsal thalamus and paraventricular organ of the hypothalamus. Several small groups of neurons in other diencephalic areas also participate in striatal innervation: proeminentia ventralis, amygdala, contralateral corpus striatum, preoptic area, posterior tuberal nucleus, locus coeruleus and raphe nuclei. Degeneration experiments after mechanical lesion of the paraventricular organ established the existence of a hypothalamostriatal projection. Degenerating axonal profiles were also found in many of the structures already identified as projecting to the striatum, suggesting that the paraventricular organ might influence the striatum not only directly but also indirectly through these other afferent systems. In the paraventricular organ, glyoxylic acid fluorescence histochemistry showed numerous monoamine neurons that corresponded in distribution and morphology to the retrogradely HRP-labeled neurons. Paraventricular-organ-lesioned males displayed a severe impairment of courtship behavior in the form of decreased tail beating and head stepping by the females. This suggests that the regulation of stereotyped hypermotricity might involve the monoamine component of the hypothalamostriatal projection.

show abstract

Topologic and connectional analysis of the dorsal thalamus of Triturus alpestris (Amphibia, Urodela, Salamandridae)

Cited by 63 publications

References 37 publications

Afferents of the lamprey striatum with special reference to the dopaminergic system: A combined tracing and immunohistochemical study

Afferents of the lamprey striatum with special reference to the dopaminergic system: A combined tracing and immunohistochemical study

The Diencephalon of the Channel Catfish, <i>Ictalurus punctatus</i>

Striatal Afferents in the Newt <i>Triturus cristatus</i>

Contact Info

Product

Resources

About