PubMed_ArguminSci  

PubMed:31680879 JSONTXT 6 Projects

Annnotations TAB TSV DIC JSON TextAE

Id Subject Object Predicate Lexical cue
T1 81-238 DRI_Approach denotes pathways from the compound eye of an insect relay to four neuropils, successively the lamina, medulla, lobula, and lobula plate in the underlying optic lobe.
T2 239-448 DRI_Approach denotes Among these neuropils, the medulla, lobula, and lobula plate are interconnected by the complex second optic chiasm, through which the anteroposterior axis undergoes an inversion between the medulla and lobula.
T3 449-573 DRI_Background denotes Given their complex structure, the projection patterns through the second optic chiasm have so far lacked critical analysis.
T4 574-880 DRI_Background denotes By densely reconstructing axon trajectories using a volumetric scanning electron microscopy (SEM) technique, we reveal the three-dimensional structure of the second optic chiasm of Drosophila melanogaster, which comprises interleaving bundles and sheets of axons insulated from each other by glial sheaths.
T5 881-975 DRI_Approach denotes These axon bundles invert their horizontal sequence in passing between the medulla and lobula.
T6 976-1122 DRI_Approach denotes Axons connecting the medulla and lobula plate are also bundled together with them but do not decussate the sequence of their horizontal positions.
T7 1123-1244 DRI_Approach denotes They interleave with sheets of projection neuron axons between the lobula and lobula plate, which also lack decussations.
T8 1245-1459 DRI_Outcome denotes We estimate that approximately 19,500 cells per hemisphere, about two thirds of the optic lobe neurons, contribute to the second chiasm, most being Tm cells, with an estimated additional 2,780 T4 and T5 cells each.
T9 1460-1549 DRI_Background denotes The chiasm mostly comprises axons and cell body fibers, but also a few synaptic elements.
T10 1550-1725 DRI_Approach denotes Based on our anatomical findings, we propose that a chiasmal structure between the neuropils is potentially advantageous for processing complex visual information in parallel.
T11 1726-2023 DRI_Outcome denotes The EM reconstruction shows not only the structure of the chiasm in the adult brain, the previously unreported main topic of our study, but also suggest that the projection patterns of the neurons comprising the chiasm may be determined by the proliferation centers from which the neurons develop.
T12 2024-2120 DRI_Outcome denotes Such a complex wiring pattern could, we suggest, only have arisen in several evolutionary steps.