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pro vyhledávání: '"George Boyan"'
Autor:
George Boyan, Erica Ehrhardt
Publikováno v:
Development genes and evolution. 232(5-6)
Johnston´s organ has been shown to act as an antennal auditory organ across a spectrum of insect species. In the hemimetabolous desert locust Schistocerca gregaria, Johnston´s organ must be functional on hatching and so develops in the pedicellar s
Autor:
Erica Ehrhardt, George Boyan
Publikováno v:
Invertebrate Neuroscience
Sensory and motor systems in insects with hemimetabolous development must be ready to mediate adaptive behavior directly on hatching from the egg. For the desert locust S. gregaria, cholinergic transmission from antennal sensillae to olfactory or mec
Autor:
George Boyan, Erica Ehrhardt
Publikováno v:
Invertebrate neuroscience : IN. 20(2)
The antenna is a key sensory organ in insects. Factors which pattern its epithelium and the spacing of sensillae will play an important role in shaping its contribution to adaptive behavior. The antenna of the grasshopper S. gregaria has three major
Publikováno v:
Development Genes and Evolution. 228:149-162
The tritocerebral commissure giant (TCG) of the grasshopper Schistocerca gregaria is one of the best anatomically and physiologically described arthropod brain neurons. A member of the so-called Ventral Giant cluster of cells, it integrates sensory i
Publikováno v:
Development Genes and Evolution. 228:105-118
We have investigated the pattern of apoptosis in the antennal epithelium during embryonic development of the grasshopper Schistocerca gregaria. The molecular labels lachesin and annulin reveal that the antennal epithelium becomes subdivided into segm
Autor:
Erica Ehrhardt, George Boyan
Publikováno v:
Invertebrate neuroscience : IN. 19(1)
The antennal nervous system of the grasshopper Schistocerca gregaria features two parallel axon tracts each established early in embryogenesis by discrete pairs of pioneer neurons located at the antennal tip and whose growth cones contact so-called b
Autor:
Xi-guang Zhang, George Boyan, Yu Liu, Nicholas J. Butterfield, Tian Lan, Jin-bo Hou, Javier Ortega-Hernández, Jie Yang
Publikováno v:
Proceedings of the National Academy of Sciences. 113:2988-2993
Panarthropods are typified by disparate grades of neurological organization reflecting a complex evolutionary history. The fossil record offers a unique opportunity to reconstruct early character evolution of the nervous system via exceptional preser
Publikováno v:
Arthropod Structure & Development. 45:23-30
In the early embryonic grasshopper, two pairs of sibling cells near the apex of the antenna pioneer its dorsal and ventral nerve tracts to the brain. En route, the growth cones of these pioneers contact a so-called base pioneer associated with each t
Autor:
Erica Ehrhardt, George Boyan
Publikováno v:
Development Genes and Evolution. 225:377-382
The twin nerve tracts of the antenna of the grasshopper Schistocerca gregaria are established early in embryogenesis by sibling pairs of pioneers which delaminate from the epithelium into the lumen at the antennal tip. These cells can be uniquely ide
Publikováno v:
Development Genes and Evolution. 225:187-194
The antennae of the grasshopper Schistocerca gregaria possess a pair of nerve pathways which are established by so-called pioneer neurons early in embryonic development. Subsequently, sensory cell clusters mediating olfaction, flight, optomotor respo