Competition and the dynamics of axon arbor growth in the cricket

The Journal of Comparative Neurology
R K Murphey

Abstract

The growth of an identified axonal arborization in the cricket cercal sensory system was studied under conditions that vary the number of neighboring axonal arborizations. The cell studied is one of a small number of neurons that arborize bilaterally and is called the X-neuron. Normally the axonal arborization of X is distributed roughly symmetrically about the midline. Seven days after the birth of this neuron, as soon after its birth as it can be stained, the axonal arbor is more than half the normal size and it exhibits the normal degree of bilaterality. During the remaining 50 days of postembryonic development, the arbor grows to its adult size, maintaining the bilateral distribution. The relationship between the growth of this axonal arbor and the presence or absence of its neighbors was studied by the removal of one of the sensory appendages. The removal of a cercus removes those neighbors near one half of the X-neuron's arbor and causes a dramatic shift in the bilateral distribution of X's axonal processes; after treatment nearly all of the varicosities were found in the deafferented region (Figs. 2, 6). Thus, neuron X responds to the loss of some to its neighbors by removing synaptic material from the area with normal n...Continue Reading

References

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Citations

Aug 1, 1994·Journal of Computational Neuroscience·A A HillR K Murphey
Mar 18, 2008·Arthropod Structure & Development·Julia Lüdke, Reinhard Lakes-Harlan
Sep 1, 1991·Journal of Clinical and Experimental Neuropsychology·M ShererR L Adams
Jan 14, 2000·Electrophoresis·R W HammondJ M Rothberg
Jul 30, 2014·Perceptual and Motor Skills·Ryan CausbySusan Hillier
Jan 1, 1990·Journal of Neurobiology·R K Murphey, A Chiba
Jul 1, 1989·Journal of Neurobiology·G A Lnenicka, R K Murphey

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