1999
DOI: 10.1007/s004410051325
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Types, numbers and distribution of synapses on the dendritic tree of an identified visual interneuron in the brain of the locust

Abstract: The descending contralateral movement detector (DCMD), an identified descending interneuron in the brain of the locust Schistocerca gregaria has been investigated by using light and electron microscopy. We describe the fine structure, distribution and numbers of synapses that it receives from another identified brain neuron, the lobular giant movement detector (LGMD), and from unidentified neurons. The DCMD dendrites emerging from the integrative segment vary in form and number between individuals and sexes bu… Show more

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Cited by 24 publications
(24 citation statements)
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“…1B. Some of these axon terminals contact the DCMD neuron (Killmann et al 1999;. The two inhibitory dendritic fields (B and C in Fig.…”
Section: R E S U L T Smentioning
confidence: 94%
See 1 more Smart Citation
“…1B. Some of these axon terminals contact the DCMD neuron (Killmann et al 1999;. The two inhibitory dendritic fields (B and C in Fig.…”
Section: R E S U L T Smentioning
confidence: 94%
“…In the protocerebrum, the LGMD contacts the descending contralateral movement detector neuron (DCMD) neuron via a powerful synaptic connection (Killmann and Schürmann 1985;Killmann et al 1999;O'Shea and Rowell 1975;Rind 1984). The DCMD fires in a 1:1 fashion with the LGMD and projects to thoracic motor centers, synapsing onto neurons involved in the generation of jumps and flight steering maneuvers (Burrows 1996;Simmons 1980).…”
mentioning
confidence: 99%
“…Another possible explanation of sublinear summation could involve accurate transmission of information between the LGMD and DCMD. Faithful transferral of LGMD spikes to the DCMD at firing rates Յ400 spikes/s (Rind 1984) occurs via mixed electrical and chemical synapses (Killman et al 1999;O'Shea and Williams 1974), suggesting that sublinear summation is not mediated through this specific pathway. However, further experiments would determine if fidelity across this synapse is maintained at the high spike rates reported here and elsewhere (Money et al 2005).…”
Section: Sublinear Summation Of Multiple Looming Stimulimentioning
confidence: 99%
“…LGMD spikes are transferred to the DCMD in a 1:1 manner (O'Shea and Rowell 1975a;Rind 1984) via mixed electrical and chemical synapses (Killman et al 1999;O'Shea and Williams 1974). Subsequently, the DCMD connects to flight interneurons and motorneurons within the thoracic ganglia (Burrows and Rowell 1973;Robertson and Pearson 1983;Simmons 1980).…”
Section: Introductionmentioning
confidence: 99%
“…It projects onto a postsynaptic target neuron called the descending contralateral movement detector (DCMD) that can easily be recorded from the animal's nerve cord (O'Shea and Williams 1974). The connection between the LGMD and DCMD is mediated by a mixed chemical/electrical synapse (Killmann et al 1999) and is so strong that spikes in the LGMD and DCMD are in a 1:1 correspondence under visual stimulation (Gabbiani et al 2005;O'Shea and Williams 1974;Rind 1984). The LGMD can thus be conveniently identified electrophysiologically as the unique neuron in the optic lobe whose spikes precede by nearly 2 ms those of the DCMD.…”
mentioning
confidence: 99%