Characterization of a novel central pattern generator located in the VIIth abdominal ganglion of Locusta

1992 ◽  
Vol 38 (12) ◽  
pp. 1011-1022 ◽  
Author(s):  
Giovanni Facciponte ◽  
Angela B. Lange
Keyword(s):  
Central Pattern Generator ◽  
Pattern Generator ◽  
Abdominal Ganglion

A Newly Identified Buccal Interneuron Initiates and Modulates Feeding Motor Programs in Aplysia

2003 ◽  
Vol 90 (4) ◽  
pp. 2190-2204 ◽  
Author(s):  
N. C. Dembrow ◽  
J. Jing ◽  
A. Proekt ◽  
A. Romero ◽  
F. S. Vilim ◽  
...  
Keyword(s):  
Central Pattern Generator ◽  
Pattern Generator ◽  
Considerable Progress ◽  
Buccal Ganglion ◽  
Motor Programs ◽  
Cerebral Ganglia ◽  
Full Complement ◽  
Electrophysiological Characterization

Despite considerable progress in characterizing the feeding central pattern generator (CPG) in Aplysia, the full complement of neurons that generate feeding motor programs has not yet been identified. The distribution of neuropeptide-containing neurons in the buccal and cerebral ganglia can be used as a tool to identify additional elements of the feeding circuitry by providing distinctions between otherwise morphologically indistinct neurons. For example, our recent study revealed a unique and potentially interesting unpaired PRQFVamide (PRQFVa)-containing neuron in the buccal ganglion. In this study, we describe the morphological and electrophysiological characterization of this novel neuron, which we designate as B50. We found that activation of B50 is capable of producing organized rhythmic output of the feeding CPG. The motor programs elicited by B50 exhibit some similarities as well as differences to motor programs elicited by the command-like cerebral-to-buccal interneuron CBI-2. In addition to activating the feeding CPG, B50 may act as a program modulator.

scholarly journals Lesions of abdominal connectives reveal a conserved organization of the calling song central pattern generator (CPG) network in different cricket species

2021 ◽  
Author(s):  
Chu-Cheng Lin ◽  
Berthold Hedwig
Keyword(s):  
Central Pattern Generator ◽  
Sound Production ◽  
Motor Pattern ◽  
Phrase Structure ◽  
Pattern Generator ◽  
Abdominal Ganglion ◽  
Calling Song ◽  
Metathoracic Ganglion ◽  
Singing Activity ◽  
Species Specific

AbstractAlthough crickets move their front wings for sound production, the abdominal ganglia house the network of the singing central pattern generator. We compared the effects of specific lesions to the connectives of the abdominal ganglion chain on calling song activity in four different species of crickets, generating very different pulse patterns in their calling songs. In all species, singing activity was abolished after the connectives between the metathoracic ganglion complex and the first abdominal ganglion A3 were severed. The song structure was lost and males generated only single sound pulses when connectives between A3 and A4 were cut. Severing connectives between A4 and A5 had no effect in the trilling species, it led to an extension of chirps in a chirping species and to a loss of the phrase structure in two Teleogryllus species. Cutting the connectives between A5 and A6 caused no or minor changes in singing activity. In spite of the species-specific pulse patterns of calling songs, our data indicate a conserved organisation of the calling song motor pattern generating network. The generation of pulses is controlled by ganglia A3 and A4 while A4 and A5 provide the timing information for the chirp and/or phrase structure of the song.

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