Neuronal control of the forewings in two different behaviours: Stridulation and flight in the cricket, Teleogryllus commodus

Hennig, R. Matthias

doi:10.1007/bf00192655

Cited by 27 publications

(27 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interneurons participating in stridulatory motor pattern generation in crickets and grasshoppers reach phasic spike rates of Ն200 Hz (e.g., Hedwig 1992a,b;Hennig 1990). The most likely candidate neuron(s) mediating the inhibitory corollary discharge is therefore those contained within the so-far uncharacterized stridulatory motor network in the thoracic ganglia.…”

Section: Inputs To Auditory Afferents and On1 During Singingmentioning

confidence: 99%

A Corollary Discharge Mechanism Modulates Central Auditory Processing in Singing Crickets

Poulet

Hedwig

2003

Journal of Neurophysiology

View full text Add to dashboard Cite

Poulet, J.F.A. and B. Hedwig. A corollary discharge mechanism modulates central auditory processing in singing crickets. J Neurophysiol 89: 1528Neurophysiol 89: -1540Neurophysiol 89: , 2003 10.1152/jn.0846.2002. Crickets communicate using loud (100 dB SPL) sound signals that could adversely affect their own auditory system. To examine how they cope with this self-generated acoustic stimulation, intracellular recordings were made from auditory afferent neurons and an identified auditory interneuron-the Omega 1 neuron (ON1)-during pharmacologically elicited singing (stridulation). During sonorous stridulation, the auditory afferents and ON1 responded with bursts of spikes to the crickets' own song. When the crickets were stridulating silently, after one wing had been removed, only a few spikes were recorded in the afferents and ON1. Primary afferent depolarizations (PADs) occurred in the terminals of the auditory afferents, and inhibitory postsynaptic potentials (IPSPs) were apparent in ON1. The PADs and IPSPs were composed of many summed, small-amplitude potentials that occurred at a rate of about 230 Hz. The PADs and the IPSPs started during the closing wing movement and peaked in amplitude during the subsequent opening wing movement. As a consequence, during silent stridulation, ON1's response to acoustic stimuli was maximally inhibited during wing opening. Inhibition coincides with the time when ON1 would otherwise be most strongly excited by self-generated sounds in a sonorously stridulating cricket. The PADs and the IPSPs persisted in fictively stridulating crickets whose ventral nerve cord had been isolated from muscles and sense organs. This strongly suggests that the inhibition of the auditory pathway is the result of a corollary discharge from the stridulation motor network. The central inhibition was mimicked by hyperpolarizing current injection into ON1 while it was responding to a 100 dB SPL sound pulse. This suppressed its spiking response to the acoustic stimulus and maintained its response to subsequent, quieter stimuli. The corollary discharge therefore prevents auditory desensitization in stridulating crickets and allows the animals to respond to external acoustic signals during the production of calling song.

show abstract

Section: Inputs To Auditory Afferents and On1 During Singingmentioning

confidence: 99%

A Corollary Discharge Mechanism Modulates Central Auditory Processing in Singing Crickets

Poulet

Hedwig

2003

Journal of Neurophysiology

View full text Add to dashboard Cite

show abstract

“…6). Our interest in the possibility of per expression in thoracic neurons stems from the fact that song rhythms are generated in the metathoracic ganglion, and that motor output to muscles used for singing arises mainly from the mesothoracic ganglion (Hennig 1990;Hennig and Otto 1995/96). If, as preliminary results suggest (Lupien and Pollack 1998), ultradian and circadian rhythms share control features in crickets, then per expression in thoracic neurons is not unexpected.…”

Section: Per Immunoreactivity In the Thoracic Gangliamentioning

confidence: 99%

Antibodies against the PER protein of Drosophila label neurons in the optic lobe, central brain, and thoracic ganglia of the crickets Teleogryllus commodus and Teleogryllus oceanicus

Lupien

Marshall

Leser

et al. 2003

Cell and Tissue Research

View full text Add to dashboard Cite

We describe labeling of neurons in the central nervous system of two cricket species, Teleogryllus commodus and T. oceanicus, with both mono- and polyclonal antibodies against the PER protein. Western blots reveal that the monoclonal antibodies recognize a single protein with a molecular weight of approximately 94 kDa, i.e., similar to that of the PER protein of the moth, Anterea pernii. Neurons and their processes are labeled both in the optic lobes and in the central brain. Processes occur in the accessory medulla, the medulla, and proximal lamina, in the central complex, in the non-glomerular neuropil, and in the retrocerebral complex, suggesting that PER-containing neurons form a widely distributed network. Neurons and processes were also labeled in the meso- and metathoracic ganglia. Four to six PER-immunoreactive (ir) neurons with processes in the accessory medulla were double labeled by an antibody against pigment-dispersion factor (PDF), a peptide that is implicated in circadian rhythmicity in Drosophila. In the central brain, projections of fibers labeled by the anti-PER and anti-PDF antibodies were mainly distinct, with overlap only in a few restricted regions. In most neurons, including those projecting into the accessory medulla, PER labeling was restricted to the cytoplasm and there was no indication of circadian variation in the intensity of staining.

show abstract

“…Insect segmental ganglia possess several CPGs for generating the different motor patterns that underlie for example flight [4], [5], song production [6], [7], breathing movements [8], feeding movements [9], egg laying [10] and walking [11]. While most evidence suggests that each of these motor patterns are generated by separate and dedicated CPGs (e.g.…”

Section: Introductionmentioning

confidence: 99%

Flight and Walking in Locusts–Cholinergic Co-Activation, Temporal Coupling and Its Modulation by Biogenic Amines

2013

View full text Add to dashboard Cite

Walking and flying in locusts are exemplary rhythmical behaviors generated by central pattern generators (CPG) that are tuned in intact animals by phasic sensory inputs. Although these two behaviors are mutually exclusive and controlled by independent CPGs, leg movements during flight can be coupled to the flight rhythm. To investigate potential central coupling between the underlying CPGs, we used the muscarinic agonist pilocarpine and the amines octopamine and tyramine to initiate fictive flight and walking in deafferented locust preparations. Our data illustrate that fictive walking is readily evoked by comparatively lower concentrations of pilocarpine, whereas higher concentrations are required to elicit fictive flight. Interestingly, fictive flight did not suppress fictive walking so that the two patterns were produced simultaneously. Frequently, leg motor units were temporally coupled to the flight rhythm, so that each spike in a step cycle volley occurred synchronously with wing motor units firing at flight rhythm frequency. Similarly, tyramine also induced fictive walking and flight, but mostly without any coupling between the two rhythms. Octopamine in contrast readily evoked fictive flight but generally failed to elicit fictive walking. Despite this, numerous leg motor units were recruited, whereby each was temporarily coupled to the flight rhythm. Our results support the notion that the CPGs for walking and flight are largely independent, but that coupling can be entrained by aminergic modulation. We speculate that octopamine biases the whole motor machinery of a locust to flight whereas tyramine primarily promotes walking.

show abstract

Neuronal control of the forewings in two different behaviours: Stridulation and flight in the cricket, Teleogryllus commodus

Cited by 27 publications

References 40 publications

A Corollary Discharge Mechanism Modulates Central Auditory Processing in Singing Crickets

A Corollary Discharge Mechanism Modulates Central Auditory Processing in Singing Crickets

Antibodies against the PER protein of Drosophila label neurons in the optic lobe, central brain, and thoracic ganglia of the crickets Teleogryllus commodus and Teleogryllus oceanicus

Flight and Walking in Locusts–Cholinergic Co-Activation, Temporal Coupling and Its Modulation by Biogenic Amines

Contact Info

Product

Resources

About