Visual responses of morphologically identified tectal neurons in the crucian carp

Niida, Akiyoshi; Oka, Hiroki; Iwata, Katsumi

doi:10.1016/0006-8993(80)91040-9

Cited by 23 publications

(11 citation statements)

References 14 publications

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“…Because there are retinal fibers in the SFGS (Ito et al, 1980a), the basal dendrites have been considered to make contacts with retinal axon terminals (Meek, 1981;Vanegas and Ito, 1983;Wullimann, 1994). In support of this interpretation, it has been reported that optic nerve stimulation elicits responses in these neurons, including those with short latencies (about 2 msec; Niida et al, 1980). A thin dendrite arose from the tip of the basal dendritic trunk and reached a layer deeper to the middle cellular layer of the SGC, where the dendrite ramified into finer branches.…”

Section: Toral Recipient Tectal Cells In the Tectum: The Pyramidal Cellsmentioning

confidence: 78%

“…The circuit, therefore, can be regarded as strongly related to visual functions, under the influence of descending telencephalic projections. In fact, electrophysiological studies indicate that the TL and pyramidal cells in the tectum are visual structures (Niida et al, 1980;Northmore et al, 1983;Northmore, 1984). Telencephalic control of the circuit may be an interesting subject for physiological study.…”

Section: Discussionmentioning

confidence: 98%

“…Toral terminals make excitatory synaptic contacts with the apical dendrites of the toral recipient tectal cells (Vanegas et al, 1979;Ito et al, 1980a). Visual (presumed retinal) inputs to the basal dendrites are also excitatory (Niida et al, 1980;Ito et al, 1980a). Telencephalic projections remain to be physiologically examined and characterized.…”

Section: Toral Recipient Tectal Cells In the Tectum: The Pyramidal Cellsmentioning

confidence: 98%

“…The origin of descending tectal projections is Dc, a visual telencephalic part receiving inputs directly or indirectly from the nucleus prethalamicus (Ito and Kishida, 1977;Ito et al, 1980bIto et al, , 1982Yamane et al, 1996;Imura et al, 2003;present study). Responses of pyramidal cells evoked by optic nerve stimulations included presumed polysynaptic inputs with long latencies (10 -30 msec; Niida et al, 1980), which may be explained by descending visual projections from the telencephalon. The nature of some inputs discussed above has been characterized physiologically as well as electron microscopically.…”

Section: Toral Recipient Tectal Cells In the Tectum: The Pyramidal Cellsmentioning

confidence: 99%

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Fiber connections of the torus longitudinalis and optic tectum in holocentrid teleosts

Xue

Yamamoto

Yang

et al. 2003

J of Comparative Neurology

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Fiber connections of the torus longitudinalis (TL) and target(s) of toral recipient tectal neurons (pyramidal cells) in the optic tectum were examined by tract-tracing methods in holocentrids. Injections into the stratum marginale (SM) labeled neurons in the stratum opticum and stratum fibrosum et griseum superficiale (SFGS). They had superficial spiny dendrites, with a fan-shaped branching pattern in SM and a thick basal dendrite that gave rise to bushy horizontal branches at the boundary between the SFGS and the stratum griseum centrale (SGC), where an axon and a thin dendrite arose. The axon terminated in a middle cellular layer of the SGC, and the thin dendrite ramified slightly deeper to this cellular layer. The SM injections also labeled cells in the ipsilateral TL. Injections into either the lateral or the medial part of TL labeled terminals in the ipsilateral SM and neurons in the bilateral nucleus paracommissuralis (NPC) and nucleus subvalvularis and ipsilateral nucleus subeminentialis. Only medial TL injections labeled cells in the ipsilateral SGC. These neurons had a basal dendrite that branched in the middle cellular layer of SGC, suggesting that they receive inputs from the pyramidal cells and project back to the TL to form a closed circuit. Only lateral TL injections labeled terminals in the corpus cerebelli. A visual telencephalic portion projects to the NPC and sublayers of SGC, where dendrites of the pyramidal cells and SGC neurons ramify. The present results therefore suggest that the TL and SM are components of an intricate circuitry that exerts telencephalic descending visual influence on the optic tectum and corpus cerebelli.

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Section: Toral Recipient Tectal Cells In the Tectum: The Pyramidal Cellsmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 98%

Section: Toral Recipient Tectal Cells In the Tectum: The Pyramidal Cellsmentioning

confidence: 98%

Section: Toral Recipient Tectal Cells In the Tectum: The Pyramidal Cellsmentioning

confidence: 99%

See 2 more Smart Citations

Fiber connections of the torus longitudinalis and optic tectum in holocentrid teleosts

Xue

Yamamoto

Yang

et al. 2003

J of Comparative Neurology

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“…comm. 1978;Niida et al, 1980;Sajovic and Levinthal, 1982). There was general agreement by a majority of these authors that (1) receptive fields were often relatively very large, 30--160° across, and (2) although regular concentric fields did occur (Figure 9.12), irregular asymmetrical or multicentre fields with complex spatial properties were frequently encountered ( Figure 9.13(a) to (c)).…”

Section: The Electrically Evoked Tectal Responsementioning

confidence: 84%

The physiology of the teleostean optic tectum

Guthrie¹

1990

The Visual System of Fish

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Optic tectum of the eastern garter snake, Thamnophis sirtalis. II. Morphology of efferent cells

Dacey¹,

Ulinski²

1986

J of Comparative Neurology

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Tectal efferent neurons were retrogradely filled from extracellular injections of horseradish peroxidase (HRP) into pathways efferent from the tectum. Tectorotundal neurons have cylindrical dendritic trees, 80-100 microns in diameter, that extend vertically across the central and superficial tectal layers. Apical and basal dendrites are laden with complex appendages. The axon gives rise to an intratectal, collateral arbor that extends horizontally into the stratum griseum centrale beyond the cell's dendritic tree. The parent axon exits the tectum laterally in the tectothalamic tract. Tectogeniculate neurons also have narrow, radially oriented, and highly branched apical dendrites, but their basal dendrites are infrequently branched and lack appendages. An intratectal axon collateral forms a small, spherical arbor overlapping the apical dendrites in sublayer c of the stratum fibrosum et griseum superficiale. The parent axon ascends vertically and just below the stratum opticum turns rostrad to follow the optic fibers to the diencephalon. Tectoisthmi neurons have small somata and thin, radial dendrites that arborize below the pial surface in the stratum zonale. An intratectal axon collateral forms a spatially restricted arbor ventral to the soma in register with the dendritic tree. Tectoisthmobulbar neurons have dendrites that arborize extensively in sublayer a of the stratum fibrosum et griseum superficiale. The axon exits the tectum without collateralizing and joins a small-caliber component of the ventral tectobulbar tract. Ipsilateral tectobulbar neurons have stellate dendritic fields, 150-250 microns in diameter, that are restricted to the deep layers of the tectum. Sparsely branched dendrites are appendage-free but bear many short, fine spicules. The axon initially ascends from the soma and recurves into the stratum album centrale without collateralizing before joining a medium-caliber component of the ventral tectobulbar tract. Crossed tectobulbar neurons have large, stellate dendritic trees with diameters ranging from 200 to 500 microns. Like ipsilateral tectobulbar neurons, their dendrites are appendage-free but bear spicules. Their thick-caliber axons exit the tectum without collateralizing and course deep in the stratum album centrale to reach the dorsal tectobulbar tract.

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Visual responses of morphologically identified tectal neurons in the crucian carp

Cited by 23 publications

References 14 publications

Fiber connections of the torus longitudinalis and optic tectum in holocentrid teleosts

Fiber connections of the torus longitudinalis and optic tectum in holocentrid teleosts

The physiology of the teleostean optic tectum

Optic tectum of the eastern garter snake, Thamnophis sirtalis. II. Morphology of efferent cells

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