A crustacean lobula plate: Morphology, connections, and retinotopic organization

2017 ◽  
Vol 526 (1) ◽  
pp. 109-119 ◽  
Author(s):  
Mercedes Bengochea ◽  
Martín Berón de Astrada ◽  
Daniel Tomsic ◽  
Julieta Sztarker
Keyword(s):  
Lobula Plate ◽  
Retinotopic Organization ◽  
Plate Morphology

TOWARDS A SYSTEMATIC CHARACTERIZATION OF CASCADIA UPPER PLATE MORPHOLOGY, STRUCTURE, AND QUATERNARY DEFORMATION HISTORY: AN INTEGRATED ONSHORE-OFFSHORE APPROACH

2017 ◽  
Author(s):  
Janet T. Watt ◽  
◽  
Daniel S. Brothers ◽  
Scott E.K. Bennett ◽  
Jared W. Kluesner ◽  
...  
Keyword(s):  
Deformation History ◽  
Quaternary Deformation ◽  
Plate Morphology

The lobula plate is exclusive to insects

2021 ◽  
Vol 61 ◽  
pp. 101031
Author(s):  
Nicholas J. Strausfeld
Keyword(s):  
Lobula Plate

Echinoderm skeletal crystallography and paleobiological applications

1997 ◽  
Vol 3 ◽  
pp. 191-204 ◽  
Author(s):  
B. E. Bodenbender
Keyword(s):  
Skeletal Structure ◽  
Growth Stages ◽  
Full Potential ◽  
Initial Growth ◽  
Developmental Sequence ◽  
Coarse Scale ◽  
Common Pattern ◽  
Plate Morphology ◽  
Oriented Parallel ◽  
High Level

The crystallographic orientations of echinoderm skeletal elements can supplement standard morphological comparisons in the exploration of echinoderm evolution. At a coarse scale, many echinoderms share a crystallographic pattern in whichcaxes radiate away from the axis of pentaradial symmetry. Within this common pattern, however,caxes of different taxa can differ dramatically in their degree of variability, angles of inclination, and relationships to the external morphology of skeletal elements. Crystallographic data reflect a variety of taxon-specific influences and therefore reveal different information in different taxa. In echinoids, orientations ofcaxes in coronal plates correlate well with high-level taxonomic groupings, whilecaxes of apical plates record modes of larval development. In blastoids,caxes of radial plates have a structural interpretation, with thecaxis oriented parallel to the orientation of the surface of the radial plate during its initial growth stages. In crinoids,caxes do not correlate with taxonomic group, plate morphology, or developmental sequence, but instead correlate with relative positions of skeletal elements on the calyx. Although their full potential has yet to be explored, the varied crystallographic patterns in echinoderms have been used to clarify skeletal structure, characterize developmental anomalies, and infer homologies of skeletal plates both within specimens and between groups. A axes are less constrained in their orientations thancaxes and offer less promise of revealing novel paleobiological information.

scholarly journals Retinotopic organization of primary visual cortex in glaucoma: Comparing fMRI measurements of cortical function with visual field loss

2007 ◽  
Vol 26 (1) ◽  
pp. 38-56 ◽  
Author(s):  
Robert O. Duncan ◽  
Pamela A. Sample ◽  
Robert N. Weinreb ◽  
Christopher Bowd ◽  
Linda M. Zangwill
Keyword(s):  
Visual Cortex ◽  
Visual Field ◽  
Primary Visual Cortex ◽  
Visual Field Loss ◽  
Cortical Function ◽  
Retinotopic Organization

Vestured pits and scalariform perforation plate morphology modify the relationships between angiosperm vessel diameter, climate and maximum plant height

2018 ◽  
Vol 221 (4) ◽  
pp. 1802-1813 ◽  
Author(s):  
Juliana S. Medeiros ◽  
Frederic Lens ◽  
Hafiz Maherali ◽  
Steven Jansen
Keyword(s):  
Plant Height ◽  
Vessel Diameter ◽  
Perforation Plate ◽  
Plate Morphology ◽  
Vestured Pits

Changes in growth-plate morphology associated with rejection of rat-limb allografts.

1992 ◽  
Vol 74 (9) ◽  
pp. 1375-1384 ◽  
Author(s):  
M Mohtai ◽  
T Hotokebuchi ◽  
K Arai ◽  
Y Sugioka
Keyword(s):  
Growth Plate ◽  
Plate Morphology

Membrane Conductance Changes Associated with the Response of Motion Sensitive Insect Visual Neurons

1990 ◽  
Vol 45 (11-12) ◽  
pp. 1222-1224 ◽  
Author(s):  
Cole Gilbert
Keyword(s):  
Direct Evidence ◽  
Membrane Conductance ◽  
Inhibitory Input ◽  
Intracellular Recordings ◽  
Transmembrane Conductance ◽  
Visual Neurons ◽  
Impedance Measurements ◽  
Lobula Plate ◽  
Conductance Changes

Abstract Intracellular recordings and impedance measurements from directionally-selective visual interneurons of the lobula plate of flies show that during motion, transmembrane conductance increases during both depolarizing responses to preferred directions and hyperpolarizing re­sponses to anti-preferred directions. This provides direct evidence that these interneurons are postsynaptic to two separate populations of excitatory and inhibitory input elements.

A reassessment of the lower visual field map in striate-recipient lateral suprasylvian cortex

1993 ◽  
Vol 10 (1) ◽  
pp. 131-158 ◽  
Author(s):  
Helen Sherk ◽  
Kathleen A. Mulligan
Keyword(s):  
Visual Field ◽  
Clear Understanding ◽  
Lower Visual Field ◽  
Lower Field ◽  
Global Features ◽  
Dual Representation ◽  
Field Representation ◽  
Retinotopic Organization ◽  
Lateral Suprasylvian Cortex ◽  
Suprasylvian Cortex

AbstractLateral suprasylvian visual cortex in the cat has been studied extensively, but its retinotopic organization remains controversial. Although some investigators have divided this region into many distinct areas, others have argued for a simpler organization. A clear understanding of the region’s retinotopic organization is important in order to define distinct areas that are likely to subserve unique visual functions. We therefore reexamined the map of the lower visual field in the striate-recipient region of lateral suprasylvian cortex, a region we refer to as the lateral suprasylvian area, LS.A dual mapping approach was used. First, receptive fields were plotted at numerous locations along closely spaced electrode penetrations; second, different anterograde tracers were injected at retinotopically identified sites in area 17, yielding patches of label in LS. To visualize the resulting data, suprasylvian cortex was flattened with the aid of a computer.Global features of the map reported in many earlier studies were confirmed. Central visual field was represented posteriorly, and elevations generally shifted downward as one moved anteriorly. Often (though not always) there was a progression from peripheral locations towards the vertical meridian as the electrode moved down the medial suprasylvian bank.The map had some remarkable characteristics not previously reported in any map in the cat. The vertical meridian’s representation was split into two pieces, separated by a gap, and both pieces were partially internalized within the map. Horizontal meridian occupied the gap. The area centralis usually had a dual representation along the posterior boundary of the lower field representation, and other fragments of visual field were duplicated as well. Finally, magnification appeared to change abruptly and unexpectedly, so that compressed regions of representation adjoined expanded regions. Despite its complexity, we found the map to be more orderly than previously thought. There was no clearcut retinotopic basis on which to subdivide LS’s lower field representation into distinct areas.

Optomotor-blindH31?aDrosophila mutant of the lobula plate giant neurons

1978 ◽  
Vol 124 (4) ◽  
pp. 287-296 ◽  
Author(s):  
M. Heisenberg ◽  
R. Wonneberger ◽  
R. Wolf
Keyword(s):  
Lobula Plate
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