Projection of the nucleus pretectalis to a retinorecipient tectal layer in the pigeon (Columba livia)

Gamlin, Paul D.; Reiner, Anton; Keyser, Kent T.; Brecha, Nicholas C.; Karten, Harvey J.

doi:10.1002/(sici)1096-9861(19960506)368:3<424::aid-cne8>3.0.co;2-7

Cited by 42 publications

(17 citation statements)

References 57 publications

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“…The PT of the avian pretectum possesses a neurondense core and a neuron-sparse marginal zone (Gamlin et al, 1996). The present study shows that these two parts of PT differ in their neurochemistry.…”

Section: Neurochemical Compartmentalization Of Ptmentioning

confidence: 50%

“…PT is an ovoidal pretectal cell group located dorsal to SpL and dorsolateral to the SpM (Gamlin et al, 1996). The Giemsa staining shows that PT includes a welldefined, compact mass of cells through about the central two-thirds of its diameter, and a neuron sparse zone at its margins (Fig.…”

Section: Cytoarchitecture Of Ptmentioning

confidence: 99%

“…It is composed of several nuclei, many of which play a role in the sensory-motor integration underlying optomotor functions, such as the optokinetic response and the pupillary light reflex (Hultborn et al, 1973;McKenna and Wallman, 1981;Benevento and Standage, 1983;Fite, 1985;Gamlin and Cohen, 1988a,b;Fan et al, 1995;Büttner-Ennever et al, 1996;Deng and Rogers, 1998). Many pretectal nuclei receive visual input, either directly from the retina or from the optic tectum (Hunt and Kunzle, 1976;Benevento and Standage, 1983;Gamlin et al, 1984;Hunt and Brecha, 1984;Gamlin and Cohen, 1988a), which provides the information needed to regulate the various reflexive visuomotor functions controlled by the pretectum (McKenna and Wallman, 1981;Gamlin et al, 1984;Gamlin and Cohen 1988a,b;Fan et al, 1995;Butler and Hodos, 1996;Bü ttner-Ennever et al, 1996;Gamlin et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…It receives tectal but not retinal input (Hunt and Kunzle, 1976;Hunt and Brecha, 1984;Gamlin and Cohen, 1988a;Gamlin et al, 1996), and is thought to be involved in the control of visually guided behaviors (Hultborn et al, 1973;Gamlin and Cohen, 1988b;Gamlin et al, 1996). In addition to its visual input from the tectum, the PT also receives input from basal ganglia circuitry via the posterior nucleus of the ansa lenticularis (Gamlin et al, 1996), further suggesting a visuomotor role for PT. The PT may exert its influence by modulating the traffic of visual input to its main target, the optic tectum (TeO).…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, PT has a prominent bilateral projection to layer 5b of the TeO, the major tectal retinorecipient layer, and PT neurons projecting to tectum appear to use GABA and NPY as neurotransmitters Gamlin et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

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Differential effects of aging on the distribution of calcium-binding proteins in a pretectal nucleus of the chicken brain

Santana

Reiner

Britto

et al. 2003

Journal of Chemical Neuroanatomy

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Section: Neurochemical Compartmentalization Of Ptmentioning

confidence: 50%

Section: Cytoarchitecture Of Ptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Differential effects of aging on the distribution of calcium-binding proteins in a pretectal nucleus of the chicken brain

Santana

Reiner

Britto

et al. 2003

Journal of Chemical Neuroanatomy

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Two distinct populations of tectal neurons have unique connections within the retinotectorotundal pathway of the pigeon (Columba livia)

1997

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The tectofugal pathway is a massive ascending polysynaptic pathway from the tectum to the thalamus and then to the telencephalon. In birds, the initial component of this pathway is known as the tectorotundal pathway; in mammals, it is known as the tectopulvinar pathway. The avian tectorotundal pathway is highly developed; thus, it provides a particularly appropriate model for exploring the fundamental properties of this system in all amniotes. To further define the connectivity of the tectorotundal projections of the tectofugal pathway, we injected cholera toxin B fragment into various rotundal divisions, the tectobulbar projection, and the ventral supraoptic decussation of the pigeon. We found intense bilateral retrograde labeling of neurons that stratified within layer 13 and, in certain cases, granular staining in layer 5b of the optic tectum. Based on these results, we propose that there are two distinct types of layer 13 neurons that project to the rotundus: 1) type I neurons, which are found in the outer sublamina of layer 13 (closer to layer 12) and which project to the anterior and centralis rotundal divisions, and 2) type II neurons, which are found in the inner sublamina of layer 13 (closer to layer 14) and which project to the posterior and triangularis rotundal divisions. Only the labeling of type I neurons produced the granular dendritic staining in layer 5b. An additional type of tectal neuron was also found that projected to the tectobulbar system. We then injected Phaseolus vulgaris-leucoagglutinin in the optic tract and found that the retinal axons terminating within tectal layer 5b formed narrow radial arbors (7-10 microm in diameter) that were confined to layer 5b. Based on these results, we propose that these axons are derived from a population of small retinal ganglion cells (4.5-6.0 microm in diameter) that terminate on the distal dendrites of type I neurons. This study strongly indicated the presence of a major bilateral oligosynaptic retinotectorotundal pathway arising from small retinal ganglion cells projecting to the rotundus with only a single intervening tectal neuron, the proposed type I neuron. We suggest that a similar organization of retinotectopulvinar connections exist in reptiles and in many mammals.

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Interconnections among nuclei of the subcortical visual shell: The intergeniculate leaflet is a major constituent of the hamster subcortical visual system

Morin

Blanchard

1998

J. Comp. Neurol.

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The intergeniculate leaflet (IGL), a major constituent of the circadian visual system, is one of 12 retinorecipient nuclei forming a "subcortical visual shell" overlying the diencephalic-mesencephalic border. The present investigation evaluated IGL connections with nuclei of the subcortical visual shell and determined the extent of interconnectivity between these nuclei. Male hamsters received stereotaxic, iontophoretic injections of the retrograde tracer, cholera toxin beta fragment, or the anterograde tracer, Phaseolus vulgaris-leucoagglutin, into nuclei of the pretectum (medial, commissural, posterior, olivary, anterior, nucleus of the optic tract, posterior limitans), into the superior colliculus, or into the visual thalamic nuclei (lateral posterior, dorsal lateral geniculate, intergeniculate leaflet, ventral lateral geniculate). Retrogradely labeled cell bodies identified nuclei with afferents projecting to the site of injection, whereas the presence of anterogradely labeled fibers with terminals revealed brain nuclei targeted by neurons at the site of injection. The IGL projects bilaterally to all nuclei of the visual shell except the lateral posterior and dorsal lateral geniculate nuclei. The IGL also has afferents from the same set of nuclei, except the nucleus of the optic tract. The extensive bilateral efferent projections distinguish IGL from the ventral lateral geniculate nucleus. The superior colliculus, commissural pretectal, olivary pretectal, and posterior pretectal nuclei also project bilaterally to the majority of subcortical visual nuclei. The IGL has a well-established role in circadian rhythm regulation, but there is as yet no known function for it in the larger context of the subcortical visual system, much of which is involved in oculomotor control.

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Projection of the nucleus pretectalis to a retinorecipient tectal layer in the pigeon (Columba livia)

Cited by 42 publications

References 57 publications

Differential effects of aging on the distribution of calcium-binding proteins in a pretectal nucleus of the chicken brain

Differential effects of aging on the distribution of calcium-binding proteins in a pretectal nucleus of the chicken brain

Two distinct populations of tectal neurons have unique connections within the retinotectorotundal pathway of the pigeon (Columba livia)

Interconnections among nuclei of the subcortical visual shell: The intergeniculate leaflet is a major constituent of the hamster subcortical visual system

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