The first optic ganglion of the bee

1985 ◽  
Vol 240 (1) ◽  
Author(s):  
WilliA. Ribi
Keyword(s):  
First Optic Ganglion ◽  
Optic Ganglion

Generation and early differentiation of glial cells in the first optic ganglion of Drosophila melanogaster

Development ◽  
1992 ◽  
Vol 115 (4) ◽  
pp. 903-911 ◽  
Author(s):  
M.L. Winberg ◽  
S.E. Perez ◽  
H. Steller
Keyword(s):  
Drosophila Melanogaster ◽  
Glial Cells ◽  
Enhancer Trap ◽  
P Element ◽  
Cell Divisions ◽  
Genetic Mosaic ◽  
First Optic Ganglion ◽  
Optic Ganglion ◽  
Glial Lineage ◽  
Enhancer Trap Lines

We have examined the generation and development of glial cells in the first optic ganglion, the lamina, of Drosophila melanogaster. Previous work has shown that the growth of retinal axons into the developing optic lobes induces the terminal cell divisions that generate the lamina monopolar neurons. We investigated whether photoreceptor ingrowth also influences the development of lamina glial cells, using P element enhancer trap lines, genetic mosaics and birthdating analysis. Enhancer trap lines that mark the differentiating lamina glial cells were found to require retinal innervation for expression. In mutants with only a few photoreceptors, only the few glial cells near ingrowing axons expressed the marker. Genetic mosaic analysis indicates that the lamina neurons and glial cells are readily separable, suggesting that these are derived from distinct lineages. Additionally, BrdU pulse-chase experiments showed that the cell divisions that produce lamina glia, unlike those producing lamina neurons, are not spatially or temporally correlated with the retinal axon ingrowth. Finally, in mutants lacking photoreceptors, cell divisions in the glial lineage appeared normal. We conclude that the lamina glial cells derive from a lineage that is distinct from that of the L-neurons, that glia are generated independently of photoreceptor input, and that completion of the terminal glial differentiation program depends, directly or indirectly, on an inductive signal from photoreceptor axons.

Neural organisation in the first optic ganglion of the nocturnal bee Megalopta genalis

2004 ◽  
Vol 318 (2) ◽  
pp. 429-437 ◽  
Author(s):  
Birgit Greiner ◽  
Willi A. Ribi ◽  
William T. Wcislo ◽  
Eric J. Warrant
Keyword(s):  
Megalopta Genalis ◽  
First Optic Ganglion ◽  
Optic Ganglion

scholarly journals Spectral and Polarization Sensitivity of the Dipteran Visual System

1972 ◽  
Vol 59 (5) ◽  
pp. 534-558 ◽  
Author(s):  
Gilbert D. McCann ◽  
David W. Arnett
Keyword(s):  
Spectral Sensitivity ◽  
Motion Detection ◽  
Polarization Plane ◽  
Color Discrimination ◽  
Polarization Sensitivity ◽  
Retinular Cell ◽  
First Optic Ganglion ◽  
Optic Ganglion ◽  
The Difference ◽  
Retinular Cells

Spectral and polarization sensitivity measurements were made at several levels (retina, first and third optic ganglion, cervical connective, behavior) of the dipteran visual nervous system. At all levels, it was possible to reveal contributions from the retinular cell subsystem cells 1 to 6 or the retinular cell subsystem cells 7 and 8 or both. Only retinular cells 1 to 6 were directly studied, and all possessed the same spectral sensitivity characterized by two approximately equal sensitivity peaks at 350 and 480 nm. All units of both the sustaining and on-off variety in the first optic ganglion exhibited the same spectral sensitivity as that of retinular cells 1 to 6. It was possible to demonstrate for motion detection and optomotor responses two different spectral sensitivities depending upon the spatial wavelength of the stimulus. For long spatial wavelengths, the spectral sensitivity agreed with retinular cells 1 to 6; however, the spectral sensitivity at short spatial wavelengths was characterized by a single peak at 465 nm reflecting contributions from the (7, 8) subsystem. Although the two subsystems exhibited different spectral sensitivities, the difference was small and no indication of color discrimination mechanisms was observed. Although all retinular cells 1 to 6 exhibited a preferred polarization plane, sustaining and on-off units did not. Likewise, motion detection and optomotor responses were insensitive to the polarization plane for long spatial wavelength stimuli; however, sensitivity to select polarization planes was observed for short spatial wavelengths.

Some spatial properties in the first optic ganglion of the fly

1976 ◽  
Vol 105 (1) ◽  
pp. 65-82 ◽  
Author(s):  
K. Mimura
Keyword(s):  
Spatial Properties ◽  
First Optic Ganglion ◽  
Optic Ganglion

The Organization of the Lamina ganglionaris of the Bee

1975 ◽  
Vol 30 (11-12) ◽  
pp. 851-852 ◽  
Author(s):  
Willi A. Ribi
Keyword(s):  
Optic Tract ◽  
Second Order ◽  
Lamina Ganglionaris ◽  
Synaptic Region ◽  
First Optic Ganglion ◽  
Axon Bundle ◽  
Bee Vision ◽  
Optic Ganglion

Abstract Bee, Vision, First Optic Ganglion The lamina ganglionaris of the bee contains the first synaptic region in the optic tract. The nine retinula cells of one visual unit (ommatidium) either end in the lamina as short visual fibres or end as long visual fibres in the second optic ganglion (medulla). Each axon bundle of nine fibres from one ommatidium is associated with four different second order neurons (L-fibres) to form a single lamina cartridge. Processes of additional fibres invade single groups of cartridges.

Photoreceptor projection from a four‐tiered retina to four distinct regions of the first optic ganglion in a jumping spider

2019 ◽  
Vol 527 (8) ◽  
pp. 1348-1361 ◽  
Author(s):  
Takashi Nagata ◽  
Kentaro Arikawa ◽  
Michiyo Kinoshita
Keyword(s):  
Jumping Spider ◽  
First Optic Ganglion ◽  
Optic Ganglion
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