Ultrastructure of capitate projections in the optic neuropil of Diptera

1986 ◽  
Vol 246 (3) ◽  
pp. 481-486 ◽  
Author(s):  
WilliamS. Stark ◽  
StanleyD. Carlson
Keyword(s):  
Optic Neuropil

scholarly journals CRY-dependent plasticity of tetrad presynaptic sites in the visual system of Drosophila at the morning peak of activity and sleep

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Milena Damulewicz ◽  
Olga Woźnicka ◽  
Małgorzata Jasińska ◽  
Elżbieta Pyza
Keyword(s):  
Synaptic Vesicles ◽  
Dense Core ◽  
Synaptic Proteins ◽  
Scaffolding Protein ◽  
Wild Type ◽  
Night Sleep ◽  
Functional Changes ◽  
Time Points ◽  
Morning Peak ◽  
Optic Neuropil

Abstract Tetrad synapses are formed between the retina photoreceptor terminals and postsynaptic cells in the first optic neuropil (lamina) of Drosophila. They are remodelled in the course of the day and show distinct functional changes during activity and sleep. These changes result from fast degradation of the presynaptic scaffolding protein Bruchpilot (BRP) by Cryptochrome (CRY) in the morning and depend on BRP-170, one of two BRP isoforms. This process also affects the number of synaptic vesicles, both clear and dense-core, delivered to the presynaptic elements. In cry01 mutants lacking CRY and in brpΔ170, the number of synaptic vesicles is lower in the morning peak of activity than during night-sleep while in wild-type flies the number of synaptic vesicles is similar at these two time points. CRY may also set phase of the circadian rhythm in plasticity of synapses. The process of synapse remodelling stimulates the formation of clear synaptic vesicles in the morning. They carry histamine, a neurotransmitter in tetrad synapses and seem to be formed from glial capitate projections inside the photoreceptor terminals. In turn dense-core vesicles probably carry synaptic proteins building the tetrad presynaptic element.

Neural organization of the third optic neuropil, the lobula, in the highly visual semiterrestrial crab Neohelice granulata

2022 ◽  
Author(s):  
María Grazia Lepore ◽  
Daniel Tomsic ◽  
Julieta Sztarker
Keyword(s):  
Neohelice Granulata ◽  
The Third ◽  
Neural Organization ◽  
Optic Neuropil

Membrane specializations in the first optic neuropil of the housefly,Musca domestica L. I. Junctions between neurons

1980 ◽  
Vol 9 (4) ◽  
pp. 429-449 ◽  
Author(s):  
Che Chi ◽  
Stanley D. Carlson
Keyword(s):  
Musca Domestica ◽  
Optic Neuropil

Membrane specializations in the first optic neuropil of the housefly,Musca domestica L. II. Junctions between glial cells

1980 ◽  
Vol 9 (4) ◽  
pp. 451-469 ◽  
Author(s):  
Che Chi ◽  
Stanley D. Carlson
Keyword(s):  
Glial Cells ◽  
Musca Domestica ◽  
Optic Neuropil

scholarly journals The Clock Input to the First Optic Neuropil of Drosophila melanogaster Expressing Neuronal Circadian Plasticity

PLoS ONE ◽  
2011 ◽  
Vol 6 (6) ◽  
pp. e21258 ◽  
Author(s):  
Milena Damulewicz ◽  
Elzbieta Pyza
Keyword(s):  
Drosophila Melanogaster ◽  
Optic Neuropil

Neural organization of the second optic neuropil, the medulla, in the highly visual semiterrestrial crabNeohelice granulata

2014 ◽  
Vol 522 (14) ◽  
pp. 3177-3193 ◽  
Author(s):  
Julieta Sztarker ◽  
Daniel Tomsic
Keyword(s):  
Neural Organization ◽  
Optic Neuropil
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