Retinal projections in the hagfish, Eptatretus burgeri

Kusunoki, Toyokazu; Amemiya, Fumiaki

doi:10.1016/0006-8993(83)91021-1

Cited by 36 publications

(19 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Except for the telencephalic projections, all retinal recipient areas were bilateral, but projections were heavier contralaterally in most target areas. The results coincide basically with those in Acipenser gülden-städti [Repérant et al, 1982], Polypterus palmas, Lepisosteus osseus [Braford and Northcutt, 1983], Lepisosteus platyrhincus [Collin and Northcutt, 1995], Amia calva [Butler and Northcutt, 1992], and Platyrhinoidis triseriata [Northcutt and Wathey, 1980], Lamperta fluviatilis [Vesselkin et al, 1980], Eptatretus burgeri [Kusunoki and Amemiya, 1983], Eptatretus stouti [Wicht and Northcutt, 1990], European Salamandridae [Salamandra salamandra, Triturus cristatus and Triturus alpestris ;Fritzsch, 1980], Ichthyophis kohtaoensis [Himstedt and Manteuffel, 1985], and Bufo marinus [Wye-Dvorak et al, 1992] in that a part of the optic nerve does not decussate at the chiasm, and reaches the ipsilateral target areas. However, Braford and Northcutt [1983] reported that projections to the accessory optic nucleus in Polypterus palmas and Lepisosteus osseus, and to the ventrolateral thalamic nucleus and superficial pretectal nucleus in Lepisosteus osseus are only contralateral.…”

Section: Discussionsupporting

confidence: 65%

“…We also compare the present data with those obtained in four species of chondrichthyans [Nagaprion brevirostris, Graeber and Ebbesson, 1972;Ginglymostoma cirratum, Luiten, 1981a, b; Rhinobatos productus, Ebbesson and Meyer, 1980; Platyrhinoidis triseriata, Northcutt and Wathey, 1980] as well as several teleost species [e.g. Vanegas and Northcutt and Wullimann, 1988;Butler and Saidel, 1991;Ito et al, 1992], lampreys [Vesselkin et al, 1980[Vesselkin et al, , 1984, hagfishes [Kusunoki and Amemiya, 1983;Wicht and Northcutt, 1990], lungfishes [Northcutt, 1977], and amphibians [Fritzsch, 1980;Fritzsch and Himstedt, 1981;Himstedt and Manteuffel, 1985;Uchiyama, 1989;Wye-Dvorak et al, 1992].…”

Section: Discussionmentioning

confidence: 85%

See 1 more Smart Citation

Retinal Projections and Retinal Ganglion Cell Distribution Patterns in a Sturgeon <i>(Acipenser transmontanus),</i> a Non-Teleost Actinopterygian Fish

Ito

Yoshimoto²,

Albert³

et al. 1999

Brain Behav Evol

View full text Add to dashboard Cite

Retinal projections in a sturgeon were studied by injecting biocytin or HRP into the optic nerve. The target areas are the preoptic area, thalamus, area pretectalis, nucleus of posterior commissure, optic tectum, and nuclei of the accessory optic tract. Furthermore, a few labeled fibers and terminals were found in a ventrolateral area of the caudal telencephalon. All retinal projections are bilateral, although contralateral projections were more heavily labeled. Retrogradely labeled neurons were found in the ventral thalamus bilaterally. Retinal projections in sturgeons are similar to those of other non-teleost actinopterygians and chondrichthyans (sharks), in terms of the targets and extent of bilateral projections. Distribution patterns of ganglion cells in the retina were examined in Nissl-stained retinal whole mount preparations. The highest density areas were found in the temporal and nasal retinas, and a dense band of ganglion cells was observed along the horizontal axis between the nasal and temporal areas of highest density. The density of ganglion cells in the dorsal retina is the lowest. The total number of ganglion cells was estimated to be about 5 × 10⁴ in a retina. The existence of a low density area in the dorsal retina suggests reduced visual acuity in the ventral visual field.

show abstract

Section: Discussionsupporting

confidence: 65%

Section: Discussionmentioning

confidence: 85%

Retinal Projections and Retinal Ganglion Cell Distribution Patterns in a Sturgeon <i>(Acipenser transmontanus),</i> a Non-Teleost Actinopterygian Fish

Ito

Yoshimoto²,

Albert³

et al. 1999

Brain Behav Evol

View full text Add to dashboard Cite

show abstract

“…The retina contains only two main nuclear layers, with no obvious bipolar or amacrine cells, and the photoreceptors connect directly to the output neurons (ganglion cells) 36,[41][42][43] . In hagfish, these ganglion cells project predominantly to the hypothalamus 44,45 , just as their likely homologues, the melanopsin-containing retinal ganglion cells, do in mammals 46 . Hagfish photoreceptors have a simple structure 36,39,42,43 (FIG.…”

Section: The Hagfish Eyementioning

confidence: 99%

Evolution of the vertebrate eye: opsins, photoreceptors, retina and eye cup

2007

View full text Add to dashboard Cite

Charles Darwin appreciated the conceptual difficulty in accepting that an organ as wonderful as the vertebrate eye could have evolved through natural selection. He reasoned that if appropriate gradations could be found that were useful to the animal and were inherited, then the apparent difficulty would be overcome. Here, we review a wide range of findings that capture glimpses of the gradations that appear to have occurred during eye evolution, and provide a scenario for the unseen steps that have led to the emergence of the vertebrate eye.

show abstract

“…Labeled retrograde cells in the mesencephalic tegmentum have been identified with different names in different species [Wilczynski and Northcutt, 1977;Northcutt and Butler, 1980;Grover and Sharma, 1981;Luiten, 1981;Smeets, 1982;Fiebig et al, 1983;Kusunoki and Amemiya, 1983;Vanegas and Ito, 1983;Niida and Ohono, 1984;Hofmann et al, 1990;Schlussman et al, 1990;Yamamoto et al, 1999;Pérez-Pérez et al, 2003;Xue et al, 2006].…”

Section: Mesencephalic Projectionsmentioning

confidence: 99%

Afferent Connections of the Optic Tectum in Lampreys: An Experimental Study

Arriba

Pombal²

2006

Brain Behav Evol

View full text Add to dashboard Cite

Tectal afferents were studied in adult lampreys of three species (Ichthyomyzon unicuspis, Lampetra fluviatilis, and Petromyzon marinus) following unilateral BDA injections into the optic tectum (OT). In the secondary prosencephalon, neurons projecting to the OT were observed in the pallium, the subhipoccampal lobe, the striatum, the preoptic area and the hypothalamus. Following tectal injections, backfilled diencephalic cells were found bilaterally in: prethalamic eminence, ventral geniculate nucleus, periventricular prethalamic nucleus, periventricular pretectal nucleus, precommissural nucleus, magnocellular and parvocellular nuclei of the posterior commissure and pretectal nucleus; and ipsilaterally in: nucleus of Bellonci, periventricular thalamic nucleus, nucleus of the tuberculum posterior, and the subpretectal tegmentum, as well as in the pineal organ. At midbrain levels, retrogradely labeled cells were seen in the ipsilateral torus semicircularis, the contralateral OT, and bilaterally in the mesencephalic reticular formation and inside the limits of the retinopetal nuclei. In the hindbrain, tectal projecting cells were also bilaterally labeled in the dorsal and lateral isthmic nuclei, the octavolateral area, the sensory nucleus of the descending trigeminal tract, the dorsal column nucleus and the reticular formation. The rostral spinal cord also exhibited a few labeled cells. These results demonstrate a complex pattern of connections in the lamprey OT, most of which have been reported in other vertebrates. Hence, the lamprey OT receives a large number of nonvisual afferents from all major brain areas, and so is involved in information processing from different somatic sensory modalities.

show abstract

Retinal projections in the hagfish, Eptatretus burgeri

Cited by 36 publications

References 12 publications

Retinal Projections and Retinal Ganglion Cell Distribution Patterns in a Sturgeon <i>(Acipenser transmontanus),</i> a Non-Teleost Actinopterygian Fish

Retinal Projections and Retinal Ganglion Cell Distribution Patterns in a Sturgeon <i>(Acipenser transmontanus),</i> a Non-Teleost Actinopterygian Fish

Evolution of the vertebrate eye: opsins, photoreceptors, retina and eye cup

Afferent Connections of the Optic Tectum in Lampreys: An Experimental Study

Contact Info

Product

Resources

About