Cartesian representation of stimulus direction: Parallel processing by two sets of giant interneurons in the cockroach

Kolton, L.; Camhi, Jeffrey M.

doi:10.1007/bf01021589

Cited by 18 publications

(8 citation statements)

References 46 publications

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“…Adult cockroaches possess hundreds of wind-sensory hairs on their paired abdominal cerci which detect the direction of hair movements [6,[19][20][21]. The sensory neurons of these hairs input to giant interneurons (GIs) in the terminal ganglion, each with its own directional selectivity to wind [22]. A relatively small number of GIs convey this information to the thoracic ganglia which produce the body turns [22].…”

Section: Resultsmentioning

confidence: 99%

“…The sensory neurons of these hairs input to giant interneurons (GIs) in the terminal ganglion, each with its own directional selectivity to wind [22]. A relatively small number of GIs convey this information to the thoracic ganglia which produce the body turns [22]. The angular resolution of the sensory system must have a limit; however, this will simply add to the width of the peaks in the ET distribution.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Cockroaches keep predators guessing by using preferred escape trajectories

Domenici¹,

Booth

Blagburn

et al. 2009

Comparative Biochemistry and Physiology Part A: Molecular &

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Cockroaches keep predators guessing by using preferred escape trajectories

Domenici¹,

Booth

Blagburn

et al. 2009

Comparative Biochemistry and Physiology Part A: Molecular &

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“…These two columns contribute significantly to the front and back wind receptive field of GI 1 (Fig. 2 B) (Kolton and Camhi, 1995).…”

Section: Physiology Of Identified Synapses Between Sensory Neurons Anmentioning

confidence: 96%

“…The cercal circuit consists of a relatively small number of presynaptic and postsynaptic neurons that can be identified unequivocally (Daley et al, 1981;Camhi, 1984;Hamon et al, 1994). The pattern of synaptic connectivity and the functional properties of this circuit are well defined (Daley and Camhi, 1988;Camhi, 1989;Hamon et al, 1994;Kolton and Camhi, 1995;Levi and Camhi, 2000;. Furthermore, it is possible to ablate a single neuron using intracellular injections of pronase or a fluorescent dye (Comer, 1985;Comer et al, 1988;Libersat, 1989;Libersat and Mizrahi, 1996).…”

mentioning

confidence: 99%

Synaptic Reorganization Induced by Selective Photoablation of an Identified Neuron

Mizrahi

Libersat

2001

J. Neurosci.

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The maintenance of synaptic strength and specificity in the CNS may depend on interactions among postsynaptic dendrites. We examined the effect of removing a neuron on synaptic organization. A single identified postsynaptic neuron in the adult cercal system of the cockroach was removed with photoablation. After a 30 d recovery period, the synaptic connectivity and morphology of the intact presynaptic and postsynaptic neurons were analyzed. The synaptic connectivity was reorganized in a manner that was consistent with functional plasticity. To associate anatomical changes with this reorganization, we analyzed the morphology of the presynaptic and postsynaptic neurons by quantitative morphometry. Both presynaptic and intact postsynaptic neurons maintained a stable morphology after removal of a neighboring postsynaptic neuron. Using the Hausdorff Match method (HM) (Mizrahi et al. 2000), we found that the spatial organization of the intact dendritic and axonal trees after ablation of a postsynaptic neuron remained stable. Thus, interactions with neighboring neurons were not necessary for maintaining dendritic morphology in the adult nervous system. However, adult central synapses were capable of adjusting to maintain normal function.

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“…Escape circuits in species such as crayfish (Edwards et al 1999), teleost fish (Eaton and Hackett 1984;Korn and Faber 1996), cockroaches (Ritzmann and Eaton 1998), rats (Depoortere et al 1990;Mitchell et al 1988), and cats (Mori et al 1989) have been identified and elucidated to various degrees. In many invertebrates, the rapid escape responses are mediated by large interneurons with high impulse conduction velocities, such as the medial and lateral giant fibers in the crayfish (Wiersma 1947), the Mauthner neurons in teleost fish (Sillar 2009), and the giant interneurons in the cockroach (Kolton and Camhi 1995). In the leech, the large axon of the S-cell was once thought to mediate a shortening escape response, however this intersegmental interneuron is neither sufficient nor necessary for this behavior (Sahley et al 1994).…”

Section: Introductionmentioning

confidence: 99%

Local-Distributed Integration by a Novel Neuron Ensures Rapid Initiation of Animal Locomotion

Mullins¹,

Hackett

Friesen³

2011

Journal of Neurophysiology

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Animals are adapted to respond quickly to threats in their environment. In many invertebrate and some vertebrate species, the evolutionary pressures have resulted in rapidly conducting giant axons, which allow short response times. Although neural circuits mediating escape behavior are identified in several species, little attention has been paid to this behavior in the medicinal leech, a model organism whose neuronal circuits are well known. We present data that suggest an alternative to giant axons for the rapid initiation of locomotion. A novel individual neuron, cell E21, appears to be one mediator of this short-latency action in the leech. In isolated nerve cord and semi-intact preparations, cell E21 excitation initiates and extends swimming and reduces the cycle period. The soma of this cell is located caudally, but its axon extends nearly the entire length of the nerve cord. We found that cell E21 fires impulses following local sensory inputs anywhere along the body and makes excitatory synapses onto the gating cells that drive swimming behavior. These distributed input-output sites minimize the distance information travels to initiate swimming behavior, thus minimizing the latency between sensory input and motor output. We propose that this single cell E21 functions to rapidly initiate or modulate locomotion through its distributed synaptic connections.

show abstract

Cartesian representation of stimulus direction: Parallel processing by two sets of giant interneurons in the cockroach

Cited by 18 publications

References 46 publications

Cockroaches keep predators guessing by using preferred escape trajectories

Cockroaches keep predators guessing by using preferred escape trajectories

Synaptic Reorganization Induced by Selective Photoablation of an Identified Neuron

Local-Distributed Integration by a Novel Neuron Ensures Rapid Initiation of Animal Locomotion

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