Laminar and columnar patterns of geniculocortical projections in the cat: Relationship to cytochrome oxidase

Boyd, Jeffrey E.; Matsubara, Joanne A.

doi:10.1002/(sici)1096-9861(19960219)365:4<659::aid-cne11>3.3.co;2-2

Cited by 24 publications

(54 citation statements)

References 25 publications

(29 reference statements)

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“…In the present study, we have confirmed the previous observations of Rosenquist (1980, 1983) that the Cparv conveys W-cell information and projects widely to both the striate and the extrastriate cortical areas and the observations of Boyd and Matsubara (1996) and others that projection terminals from the Cparv show a laminar pattern different from that of laminae A, which convey X-and Y-cell information in areas 17 and 18 (Fig. 10).…”

Section: Discussionsupporting

confidence: 92%

“…These results largely confirm previous findings from anterograde axon injection (LeVay and Gilbert, 1976;Ferster and LeVay 1978;Freund et al, 1985;Humphrey et al, 1985a,b;Boyd and Matsubara, 1996) and retrograde (Leventhal, 1979) studies. Boyd and Matsubara (1996) concluded that, although projections from laminae A occupy the full vertical extent of layer IV, the Cparv projects to layers I, III, and Va in area 17 without overlapping the projection layers from laminae A.…”

Section: Areas 17 and 18supporting

confidence: 92%

“…Our results from cases with injections into laminae A generally agree with results from previous studies (LeVay and Gilbert, 1976;Ferster and LeVay, 1978;Leventhal, 1979;Freund et al, 1985;Humphrey et al, 1985a;Boyd and Matsubara, 1996) that labeled terminals are seen heavily in the entire extent of layer IV, extending to the deep one-third of layer III, and in the full portion of layer VI, forming two dense bands (case Dashed lines indicate the border between layer I and layer II. The injection site is illustrated at the upper left, and a perimetry chart is shown at the lower left.…”

Section: Labelingsupporting

confidence: 91%

“…In area 18, the projection pattern of laminar distribution of labeling from laminae A is almost identical to that in area 17, the only exception being that the lower limit of labeling in layer IV is located more superficially than that in area 17. The discrepancy between their findings and ours may be attributed to the different assignment of the borders of both layers III/IV and layers IV/V, as discussed by Boyd and Matsubara (1996). They described that a dense band of cytochrome oxidase (CO) staining and A laminae labeling matched with layer IV, as determined by cytoarchitecture.…”

Section: Areas 17 and 18contrasting

confidence: 59%

“…Concerning the laminar projections from laminae A, Boyd and Matsubara (1996), using the same technique as ours, have recently reported that terminations of cortical projections from laminae A have an identical laminar location in areas 17 and 18, in that terminals from laminae A occupy the full vertical extent of layer IV in both areas. The present results show that laminae A project to the full extent of layer IV, involving the lower part of layer III and layer VI in area 17.…”

Section: Areas 17 and 18supporting

confidence: 52%

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Cortical projections of the parvocellular laminae C of the dorsal lateral geniculate nucleus in the cat: An anterograde wheat germ agglutinin conjugated to horseradish peroxidase study

Kawano

1998

J. Comp. Neurol.

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The areal and laminar distributions of the projection from the parvocellular part of laminae C of the dorsal lateral geniculate nucleus (Cparv) were studied in visual cortical areas of the cat with the anterograde tracing method by using wheat germ agglutinin conjugated to horseradish peroxidase. A particular objective of this study was to examine the central visual pathways of the W-cell system, the precise organization of which is still unknown. Because the Cparv in the cat is said to receive W-cell information exclusively from the retina and the superior colliculus, the results obtained would provide an anatomical substrate for the W-cell system organization in mammals. The results show that the cortical targets of the Cparv are areas 17, 18, 19, 20a, and 21a and the posteromedial lateral suprasylvian (PMLS) and ventral lateral suprasylvian(VLS) areas. In area 17, the projection fibers terminate in the superficial half of layer I; the lower two-thirds of layer III, extending to the superficial part of layer IV; and the deep part of layer IV, involving layer Va. These terminations form triple bands in area 17. The projection terminals in layer I are continuous, whereas those in layers III, IV, and Va distribute periodically, exhibiting a patchy appearance. In areas 18 and 19, the projection fibers terminate in the superficial half of layer I and in the full portions of layers III and IV, forming double bands. In these areas, the terminals in layer I are continuous, whereas those in layers III and IV distribute periodically, exhibiting a patchy appearance. In area 20a, area 21a, PMLS, and VLS, projection fibers terminate in the superficial part of layer I, in part of layer III, and in the full portion of layer IV, although they are far fewer in number than those seen in areas 17, 18, and 19. The present results demonstrate that the Cparv fibers terminate in a localized fashion in both the striate and the extrastriate cortical areas and that these W-cell projections are quite unique in their areal and laminar organization compared with the X- and Y-cell systems.

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Section: Discussionsupporting

confidence: 92%

Section: Areas 17 and 18supporting

confidence: 92%

Section: Labelingsupporting

confidence: 91%

Section: Areas 17 and 18contrasting

confidence: 59%

Section: Areas 17 and 18supporting

confidence: 52%

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Cortical projections of the parvocellular laminae C of the dorsal lateral geniculate nucleus in the cat: An anterograde wheat germ agglutinin conjugated to horseradish peroxidase study

Kawano

1998

J. Comp. Neurol.

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Relationships between cytochrome oxidase (CO) blobs in primate primary visual cortex (V1) and the distribution of neurons projecting to the middle temporal area (MT)

Boyd

Casagrande

1999

J. Comp. Neurol.

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The cytochrome oxidase (CO) blobs and interblobs in layer 3B of primate visual cortex have different sets of corticocortical connections. Cortical layers below layer 3B also project corticocortically, but the relationship of efferent projections from the deeper layers to the overlying blob/interblob architecture is less clear. We studied the tangential organization of neurons projecting from primary visual cortex (V1) to the middle temporal visual area (MT) and their relationship to the CO blobs. MT‐projecting neurons in two primate species, bush babies and owl monkeys, were retrogradely labeled, then charted in tangential sections, and compared to the positions of the overlying CO blobs. In both primate species, MT‐projecting neurons in layer 3C were unevenly distributed in the tangential plane, with dense patches of labeled cells that were aligned with the CO blobs. A novel two‐dimensional spatial correlation method was used to show the colocalization of MT‐projecting cells with the overlying blobs. Chi‐square analyses performed with the cortical surface equally divided into compartments of blob, interblob, and blob/interblob borders showed that blob columns tended to have about 1.5 times more MT‐projecting cells (P < 0.0001) than interblob columns. Similar analyses were applied to published data on V1 cells projecting to area MT in macaque monkey (Shipp and Zeki [1989] Euro J Neurosci 1:310–332). Again, the results showed a significant correlation between the cell distribution and CO blobs. Taken together, these results suggest that layer 3C is not uniform but is made up of a mosaic of cells that project to area MT and cells that project to some other location. These findings also indicate that the mosaic organization of layer 3C is related in some unique way to the overlying CO architecture. J. Comp. Neurol. 409:573–591, 1999. © 1999 Wiley‐Liss, Inc.

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Does the visual system of the flying fox resemble that of primates? The distribution of calcium-binding proteins in the primary visual pathway ofPteropus poliocephalus

2000

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It has been proposed that flying foxes and echolocating bats evolved independently from early mammalian ancestors in such a way that flying foxes form one of the suborders most closely related to primates. A major piece of evidence offered in support of a flying fox-primate link is the highly developed visual system of flying foxes, which is theorized to be primate-like in several different ways. Because the calcium-binding proteins parvalbumin (PV) and calbindin (CB) show distinct and consistent distributions in the primate visual system, the distribution of these same proteins was examined in the flying fox (Pteropus poliocephalus) visual system. Standard immunocytochemical techniques reveal that PV labeling within the lateral geniculate nucleus (LGN) of the flying fox is sparse, with clearly labeled cells located only within layer 1, adjacent to the optic tract. CB labeling in the LGN is profuse, with cells labeled in all layers throughout the nucleus. Double labeling reveals that all PVϩ cells also contain CB, and that these cells are among the largest in the LGN. In primary visual cortex (V1) PV and CB label different classes of nonpyramidal neurons. PVϩ cells are found in all cortical layers, although labeled cells are found only rarely in layer I. CBϩ cells are found primarily in layers II and III. The density of PVϩ neuropil correlates with the density of cytochrome oxidase staining; however, no COϩ or PVϩ or CBϩ patches or blobs are found in V1. These results show that the distribution of calcium-binding proteins in the flying fox LGN is unlike that found in primates, in which antibodies for PV and CB label specific separate populations of relay cells that exist in different layers. Indeed, the pattern of calcium-binding protein distribution in the flying fox LGN is different from that reported in any other terrestrial mammal. Within V1 no PVϩ patches, CO blobs, or patchy distribution of CBϩ neuropil that might reveal interblobs characteristic of primate V1 are found; however, PV and CB are found in separate populations of non-pyramidal neurons. The types of V1 cells labeled with antibodies to PV and CB in all mammals examined including the flying fox suggest that the similarities in the cellular distribution of these proteins in cortex reflect the fact that this feature is common to all mammals.

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Laminar and columnar patterns of geniculocortical projections in the cat: Relationship to cytochrome oxidase

Cited by 24 publications

References 25 publications

Cortical projections of the parvocellular laminae C of the dorsal lateral geniculate nucleus in the cat: An anterograde wheat germ agglutinin conjugated to horseradish peroxidase study

Cortical projections of the parvocellular laminae C of the dorsal lateral geniculate nucleus in the cat: An anterograde wheat germ agglutinin conjugated to horseradish peroxidase study

Relationships between cytochrome oxidase (CO) blobs in primate primary visual cortex (V1) and the distribution of neurons projecting to the middle temporal area (MT)

Does the visual system of the flying fox resemble that of primates? The distribution of calcium-binding proteins in the primary visual pathway ofPteropus poliocephalus

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