Organization of the Caudal Rhombencephalic Alar Plate of the Ribbed Newt &lt;i&gt;Pleurodeles waltl: &lt;/i&gt;Evidence for the Presence of Dorsal Column and Lateral Cervical Nuclei

Muñoz, Alberto; Muñoz, Margarita; González, Antonio Uriarte; Donkelaar, Hans J. ten

doi:10.1159/000006536

Cited by 7 publications

(5 citation statements)

References 93 publications

(132 reference statements)

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“…Likewise, the spinal projections of the dorsal column nucleus confirm previous studies by A. Muñ oz et al (1995A. Muñ oz et al ( , 1998.…”

Section: Discussionsupporting

confidence: 89%

“…The nomenclature is largely the same as that used in our previous studies on the basal ganglia, catecholaminergic and cholinergic systems and ascending spinal pathways in amphibians (Gonzá lez and Smeets, 1991Smeets, , 1994aSmeets, ,b, 1995A. Muñ oz et al, 1995A. Muñ oz et al, , 1998Gonzá lez et al, 1996;Marín et al, 1997aMarín et al, -e, 1998a).…”

Section: Methodsmentioning

confidence: 99%

“…the dextran amines (Glover et al, 1986;Veenman et al, 1992;Fritzsch, 1993). These tracers, which are transported anterogradely as well as retrogradely, can be delivered to restricted sites of the central nervous system and are very sensitive in tract-tracing studies in amphibians both in vivo (A. Muñ oz et al, 1995(A. Muñ oz et al, , 1997(A. Muñ oz et al, , 1998Marín et al, 1997a,b;) and in vitro (A. Muñ oz et al, 1996;Luksch et al, 1996;Marín et al, 1997f).…”

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confidence: 99%

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Descending supraspinal pathways in amphibians. I. A dextran amine tracing study of their cells of origin

Sánchez-Camacho

Marı́n

Donkelaar

et al. 2001

J of Comparative Neurology

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The present study is the first of a series on descending supraspinal pathways in amphibians in which hodologic and developmental aspects are studied. Representative species of anurans (the green frog, Rana perezi, and the clawed toad, Xenopus laevis), urodeles (the Iberian ribbed newt, Pleurodeles waltl), and gymnophionans (the Mexican caecilian, Dermophis mexicanus) have been used. By means of retrograde tracing with dextran amines, previous data in anurans were largely confirmed and extended, but the studies in P. waltl and D. mexicanus present the first detailed data on descending pathways to the spinal cord in urodeles and gymnophionans. In all three orders, extensive brainstem-spinal pathways were present with only minor representation of spinal projections originating in forebrain regions. In the rhombencephalon, spinal projections arise from the reticular formation, several parts of the octavolateral area, the locus coeruleus, the laterodorsal tegmental nucleus, the raphe nucleus, sensory nuclei (trigeminal sensory nuclei and the dorsal column nucleus), and the nucleus of the solitary tract. In all species studied, the cerebellar nucleus and scattered cerebellar cells innervate the spinal cord, predominantly contralaterally. Mesencephalic projections include modest tectospinal projections, torospinal projections, and extensive tegmentospinal projections. The tegmentospinal projections include projections from the nucleus of Edinger-Westphal, the red nucleus, and from anterodorsal, anteroventral, and posteroventral tegmental nuclei. In the forebrain, diencephalospinal projections originate in the ventral thalamus, posterior tubercle, the pretectal region, and the interstitial nucleus of the fasciculus longitudinalis medialis. The most rostrally located cells of origin of descending spinal pathways were found in the suprachiasmatic nucleus, the preoptic area and a subpallial region in the caudal telencephalic hemisphere, probably belonging to the amygdaloid complex. Our data are discussed in an evolutionary perspective.

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“…Likewise, the spinal projections of the dorsal column nucleus confirm previous studies by A. Muñ oz et al (1995A. Muñ oz et al ( , 1998.…”

Section: Discussionsupporting

confidence: 89%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Descending supraspinal pathways in amphibians. I. A dextran amine tracing study of their cells of origin

Sánchez-Camacho

Marı́n

Donkelaar

et al. 2001

J of Comparative Neurology

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“…Ascending connections of the teleost LFN are reminiscent of those arising from the dorsal column nuclei, lateral cuneate nucleus, nucleus X, and lateral cervical nucleus in mammals (Hand and Winkle, 1977;Li and Mizuno, 1997), the dorsal column and lateral cuneate nuclei in birds (Wild, 1989), and the dorsal column and lateral cervical nuclei in amphibians (Muñoz et al, 1995(Muñoz et al, , 1998.…”

Section: Somatosensory Toral Nucleus In Teleostsmentioning

confidence: 99%

Somatosensory nucleus in the torus semicircularis of cyprinid teleosts

Yamamoto

Kato

Okada

et al. 2010

J of Comparative Neurology

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Cytoarchitecture and fiber connections of the ventrolateral region of torus semicircularis were studied in goldfish and carp. Cytoarchitectural analyses indicate that two toral nuclei, ventrolateral (TSvl) and external (TSe) nuclei, are present in this toral region. The TSvl mainly receives lateral line inputs from the medial nucleus of the rhombencephalic octavolateral area, while the TSe mainly receives somatosensory fibers from the spinal cord, sensory trigeminal nuclei, and lateral funicular nucleus. The TSe also receives sparse fibers from the retina and the octavolateral area medial nucleus and sends descending fibers to the lateral funicular nucleus. Both toral nuclei receive projections from the ventromedial thalamic nucleus and the central part of dorsal telencephalic area, although the latter descending fibers terminate mainly in the TSvl. Both toral nuclei project to the rostrolateral region of lateral preglomerular nucleus, restricted to the somata layer of the dorsal zone of the region. Ventrolateral and external toral fibers, however, tended to reach lateral and medial zones of the somata layer, respectively. The present study suggests that there are three functional compartments within the cyprinid torus semicircularis (central nucleus: auditory, TSvl: lateral line, and TSe: somatosensory) and that sensory pathways arising from these toral compartments maintain largely separate ascending systems into the forebrain. The present study also extends knowledge of the organization and connections of the lateral valvular nucleus and nucleus praeeminentialis that project to the cerebellar granular layer and cerebellar crest, respectively.

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“…Regarding efferent connections, in addition to the toral projections discussed already, the present study suggests that the LFN projects to a number of structures including the cerebellum, mesencephalon, diencephalon, and possibly the telencephalon, most of which agree with the previous report in the northern searobin (Finger, 2000). Ascending connections of the teleost LFN are reminiscent of those arising from the dorsal column nuclei, lateral cuneate nucleus, nucleus X, and lateral cervical nucleus in mammals (Hand and Winkle, 1977; Li and Mizuno, 1997), the dorsal column and lateral cuneate nuclei in birds (Wild, 1989), and the dorsal column and lateral cervical nuclei in amphibians (Muñoz et al, 1995, 1998). In what follows, we limit our discussion on connections of particular note.…”

Section: Discussionmentioning

confidence: 99%