Differing afferent connections of spiking and nonspiking wind-sensitive local interneurons in the terminal abdominal ganglion of the cricket Gryllus bimaculatus

Baba, Yoshichika; Hirota, Kiyonori; Yamaguchi, Tsuneo; Shimozawa, Tateo

doi:10.1007/bf00197749

Cited by 24 publications

(13 citation statements)

References 24 publications

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“…As inhibitory information must be relayed by at least one local interneuron as mentioned above, excitatory inputs to the GIs must also be polysynaptically relayed. The polysynaptical excitatory neural pathways in the cricket cercal system have also been suggested in the previous study dealing with local interneurons (Baba et al, 1995).…”

Section: Polysynaptic Inhibitory and Excitatory Neural Pathwaysmentioning

confidence: 59%

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Organization of Receptive Fields of Cricket Giant Interneurons Revealed by Cercal Ablations

Matsuura

Kanou

1998

Zoological Science

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ABSTRACT-In order to determine the contribution of each cercus and its receptors in organizing the receptive field of four air-motion sensitive giant interneurons (GIs 8-1, 9-1, 9-2 and 9-3 ) of the cricket Gryllus bimaculatus, effects of removing the ipsilateral or contralateral cercus (referred to the side of the axons) on specific parameters of the wind-evoked responses of these neurons were investigated. All 4 GIs received only excitatory inputs from a group of filiform hairs on the ipsilateral cercus. In addition to the ipsilateral excitatory inputs, GIs 8-1 and 9-1 received weak excitatory and strong inhibitory inputs from a group of filiform hairs on the contralateral cercus. GI 9-2 received only inhibitory inputs from filiform hairs on the contralateral cercus. GI 9-3 received excitatory inputs from filiform hairs on the contralateral cercus and no inhibitory input was confirmed. In addition to such simple excitatory and inhibitory connections, the rebound motion of cercal filiform hairs had some role in organizing the receptive fields of GIs 9-2 and 9-3. Furthermore, the possibility of using a rebound depolarization of the membrane potential for mediating the long latency response in GIs 8-1 and 9-2 will be discussed.

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Section: Polysynaptic Inhibitory and Excitatory Neural Pathwaysmentioning

confidence: 59%

“…Since directional characteristics of inhibition are different from GI to GI, different types and/or numbers of local interneurons in the cricket cercal system (Kobashi and Yamaguchi, 1984;Baba et al, 1995) must be recruited for mediating inhibitory information.…”

Section: Polysynaptic Inhibitory and Excitatory Neural Pathwaysmentioning

confidence: 99%

Organization of Receptive Fields of Cricket Giant Interneurons Revealed by Cercal Ablations

Matsuura

Kanou

1998

Zoological Science

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“…The effects of neuron morphology can be sufficient to introduce significant errors in measurement of conductance [Rall et al, 1992;Hartline and Castelfranco, 2003] and synaptic [Williams and Mitchell, 2008] properties. The importance of neuron morphology is further demonstrated by the consistent across-animal neuron morphologies present in some systems [Robertson and Pearson, 1983;Bacon and Murphey, 1984;Miller and Jacobs, 1984;Murphey et al, 1984;Baba et al, 1995].…”

Section: Introductionmentioning

confidence: 96%

Pyloric Neuron Morphology in the Stomatogastric Ganglion of the Lobster, <i>Panulirus interruptus</i>

Thuma¹,

White²,

Hobbs³

et al. 2009

Brain Behav Evol

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The pyloric network of decapod crustaceans has been intensively studied electrophysiologically in the infraorders Astacidea, Brachyura, and Palinura. The morphology of some or all pyloric neurons has been well described in Astacidea and Brachyura, but less so in Palinura. Given the large evolutionary distance between these three groups, and the large amount of electrophysiology that has been performed in palinuroid species, it is important to fill this gap. We describe here the gross morphology of all six pyloric neuron types in a palinuroid, P. interruptus. All pyloric neurons had complicated, extended dendritic trees that filled the majority of the neuropil, with most small diameter processes present in a shell near the surface of the ganglion. Certain neuron types showed modest preferences for somata location in the ganglion, but these differences were too weak to use as identifying characteristics. Quantitative measurements of secondary branch number, maximum branch order, total process length, and neuron somata diameter were also, in general, insufficient to distinguish among the neurons, although AB and LP neuron somata diameters differed from those of the other types. One neuron type (VD) had a distinctive neurite branching pattern consisting of a small initial branch followed shortly by a bifurcation of the main neurite. The processes arising from these two branches occupied largely non-overlapping neuropil. Electrophysiological recordings showed that each major branch had its own spike initiation zone and that, although the zones fired correlated spikes, they generated spikes independently. VD neurons in the other infraorders have similar morphologies, suggesting that having two arbors is important for the function of this neuron. These data are similar to those previously obtained in Brachyura and Astacidea. It thus appears that, despite their long evolutionary separation, neuron morphology in these three infraorders has not greatly diverged.

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“…The method has been extensively used to demonstrate the directionality of the cercal system, beginning with the use of directional oscillatory sound stimuli (Tokareva and Rozhkova, 1973;Edwards and Palka, 1974;Palka and Olberg, 1977), and later being refined to stimuli consisting of single puffs of air (Westin et al, 1977;Tobias and Murphey, 1979;Westin, 1979;Aldworth et al, 2008;Miller and Jacobs, 1984;Jacobs and Miller, 1985;Jacobs et al, 1986;Miller et al, 1991;Theunissen and Miller, 1991;Bodnar et al, 1991;Baba et al, 1991;Baba et al, 1995;Kolton and Camhi, 1995) (Z.A., A. G. Dimitrov, G. Cummins, T. Gedeon and J.P.M., manuscript submitted). In one set of experiments, it was shown that two bilateral pairs of interneurons (10-2a and 10-3a) formed a functional unit capable of detecting air particle displacement at moderate velocities from all 360° of space in the horizontal plane Theunissen and Miller, 1991).…”

Section: Neural Coding In the Cricket Cercal Systemmentioning

confidence: 99%

Computational mechanisms of mechanosensory processing in the cricket

Jacobs

Miller

Aldworth

2008

Journal of Experimental Biology

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SUMMARY Crickets and many other orthopteran insects face the challenge of gathering sensory information from the environment from a set of multi-modal sensory organs and transforming these stimuli into patterns of neural activity that can encode behaviorally relevant stimuli. The cercal mechanosensory system transduces low frequency air movements near the animal's body and is involved in many behaviors including escape from predators, orientation with respect to gravity, flight steering, aggression and mating behaviors. Three populations of neurons are sensitive to both the direction and dynamics of air currents:an array of mechanoreceptor-coupled sensory neurons, identified local interneurons and identified projection interneurons. The sensory neurons form a functional map of air current direction within the central nervous system that represents the direction of air currents as three-dimensional spatio-temporal activity patterns. These dynamic activity patterns provide excitatory input to interneurons whose sensitivity and spiking output depend on the location of the neuronal arbors within the sensory map and the biophysical and electronic properties of the cell structure. Sets of bilaterally symmetric interneurons can encode the direction of an air current stimulus by their ensemble activity patterns, functioning much like a Cartesian coordinate system. These interneurons are capable of responding to specific dynamic stimuli with precise temporal patterns of action potentials that may encode these stimuli using temporal encoding schemes. Thus, a relatively simple mechanosensory system employs a variety of complex computational mechanisms to provide the animal with relevant information about its environment.

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Differing afferent connections of spiking and nonspiking wind-sensitive local interneurons in the terminal abdominal ganglion of the cricket Gryllus bimaculatus

Cited by 24 publications

References 24 publications

Organization of Receptive Fields of Cricket Giant Interneurons Revealed by Cercal Ablations

Organization of Receptive Fields of Cricket Giant Interneurons Revealed by Cercal Ablations

Pyloric Neuron Morphology in the Stomatogastric Ganglion of the Lobster, <i>Panulirus interruptus</i>

Computational mechanisms of mechanosensory processing in the cricket

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