Control of locomotion in marine mollusc Clione limacina IV. Role of type 12 interneurons

1985 ◽  
Vol 58 (2) ◽  
Author(s):  
Yu.I. Arshavsky ◽  
I.N. Beloozerova ◽  
G.N. Orlovsky ◽  
Yu.V. Panchin ◽  
G.A. Pavlova
Keyword(s):  
Marine Mollusc ◽  
Clione Limacina

Control of locomotion in the marine mollusc Clione limacina

1996 ◽  
Vol 109 (2) ◽  
Author(s):  
Y.V. Panchin ◽  
Y.I. Arshavsky ◽  
T.G. Deliagina ◽  
G.N. Orlovsky ◽  
L.B. Popova ◽  
...  
Keyword(s):  
Marine Mollusc ◽  
Clione Limacina

Gamma-aminobutyric acid induces feeding behaviour in the marine mollusc, Clione limacina

Neuroreport ◽  
1991 ◽  
Vol 2 (4) ◽  
pp. 169-172 ◽  
Author(s):  
Yuri L. Arshavsky ◽  
Georgi N. Gamkrelidze ◽  
Grigori N. Orlovsky ◽  
Yuri V. Panchin ◽  
Lioudmila B. Popova
Keyword(s):  
Feeding Behaviour ◽  
Aminobutyric Acid ◽  
Gamma Aminobutyric Acid ◽  
Marine Mollusc ◽  
Clione Limacina

Control of locomotion in marine mollusc Clione limacina I. Efferent activity during actual and fictitious swimming

1985 ◽  
Vol 58 (2) ◽  
Author(s):  
Yu.I. Arshavsky ◽  
I.N. Beloozerova ◽  
G.N. Orlovsky ◽  
Yu.V. Panchin ◽  
G.A. Pavlova
Keyword(s):  
Efferent Activity ◽  
Marine Mollusc ◽  
Clione Limacina

Dual Sensory-Motor Function for a Molluskan Statocyst Network

2004 ◽  
Vol 91 (1) ◽  
pp. 336-345 ◽  
Author(s):  
R. Levi ◽  
P. Varona ◽  
Y. I. Arshavsky ◽  
M. I. Rabinovich ◽  
A. I. Selverston
Keyword(s):  
Search Behavior ◽  
Motor Program ◽  
Hunting Behavior ◽  
Marine Mollusk ◽  
Receptor Cells ◽  
Motor Nerves ◽  
Clione Limacina ◽  
Biologically Based Model

In mollusks, statocyst receptor cells (SRCs) interact with each other forming a neural network; their activity is determined by both the animal's orientation in the gravitational field and multimodal inputs. These two facts suggest that the function of the statocysts is not limited to sensing the animal's orientation. We studied the role of the statocysts in the organization of search motion during hunting behavior in the marine mollusk, Clione limacina. When hunting, Clione swims along a complex trajectory including numerous twists and turns confined within a definite space. Search-like behavior could be evoked pharmacologically by physostigmine; application of physostigmine to the isolated CNS produced “fictive search behavior” monitored by recordings from wing and tail nerves. Both in behavioral and in vitro experiments, we found that the statocysts are necessary for search behavior. The motor program typical of searching could not be produced after removing the statocysts. Simultaneous recordings from single SRCs and motor nerves showed that there was a correlation between the SRCs activity and search episodes. This correlation occurred even though the preparation was fixed and, therefore the sensory stimulus was constant. The excitation of individual SRCs could in some cases precede the beginning of search episodes. A biologically based model showed that, theoretically, the hunting search motor program could be generated by the statocyst receptor network due to its intrinsic dynamics. The results presented support for the idea that the statocysts are actively involved in the production of the motor program underlying search movements during hunting behavior.

Control of locomotion in marine mollusk Clione limacina. VIII. Cerebropedal neurons

1995 ◽  
Vol 73 (5) ◽  
pp. 1912-1923 ◽  
Author(s):  
Y. V. Panchin ◽  
L. B. Popova ◽  
T. G. Deliagina ◽  
G. N. Orlovsky ◽  
Y. I. Arshavsky
Keyword(s):  
Motor Neurons ◽  
The Other ◽  
Locomotor Rhythm ◽  
Marine Mollusk ◽  
Sensory Inputs ◽  
Cerebral Ganglia ◽  
Excitatory Action ◽  
Immunohistochemical Methods ◽  
Clione Limacina

1. The pteropod mollusk Clione limacina swims by rhythmical oscillations of two wings, and its spatial orientation during locomotion is determined by tail movements. The majority of neurons responsible for generation of the wing and tail movements are located in the pedal ganglia. On the other hand, the majority of sensory inputs that affect wing and tail movements project to the cerebral ganglia. The goal of the present study was to identify and characterize cerebropedal neurons involved in the control of the swimming central generator or motor neurons of wing and tail muscles. Cerebropedal neurons affecting locomotion-controlling mechanisms are located in the rostromedial (CPA neurons), caudomedial (CPB neurons), and central (CPC neurons) zones of the cerebral ganglia. According to their morphology and effects on pedal mechanisms, 10 groups of the cerebropedal neurons can be distinguished. 2. CPA1 neurons project through the ipsilateral cerebropedal connective to both pedal ganglia. Activation of a CPA1 by current injection resulted in speeding up of the locomotor rhythm and intensification of the firing of the locomotor motor neurons. 3. CPA2 neurons send numerous thin fibers into the ipsi- and contralateral pedal and pleural ganglia through the cerebropedal and cerebropleural connectives. They strongly inhibit the wing muscle motor neurons and, to a lesser extent, slow down the locomotor rhythm. 4. CPB1 neurons project through the contralateral cerebropedal connective to both pedal ganglia. They activate the locomotor generator. 5. CPB2 neurons also project, through the contralateral cerebropedal connective, to both pedal ganglia. They affect wing muscle motor neurons. 6. CPB3 neurons have diverse morphology: they project to the pedal ganglia either through the ipsilateral cerebropedal connective, or through the contralateral one, or through both of them. They affect putative motor neurons of the tail muscles. 7. CPC1, CPC2, and CPC3 neurons project through the ipsilateral cerebropedal connective to both pedal ganglia. They activate the locomotor generator. 8. CPC4 and CPC5 neurons project through the contralateral cerebropedal connective to the contralateral pedal ganglia. They activate the locomotor generator. 9. Serotonergic neurons were mapped in the CNS of Clione by immunohistochemical methods. Location and size of cells in two groups of serotonin-immunoreactive neurons in the cerebral ganglia appeared to be similar to those of CPA1 and CPB1 neurons. This finding suggests a possible mechanism for serotonin's ability to exert a strong excitatory action on the locomotor generator of Clione. 10. The role of different groups of cerebropedal neurons is discussed in relation to different forms of Clione's behavior in which locomotor activity is involved.

scholarly journals INTERNEURONES MEDIATING THE ESCAPE REACTION OF THE MARINE MOLLUSC CLIONE LIMACINA

1992 ◽  
Vol 164 (1) ◽  
pp. 307-314
Author(s):  
YU. I. ARSHAVSKY ◽  
T. G. DELIAGINA ◽  
G. N. ORLOVSKY ◽  
YU. V. PANCHIN ◽  
L. B. POPOVA
Keyword(s):  
Marine Mollusc ◽  
Escape Reaction ◽  
Clione Limacina

Control of locomotion in marine mollusc Clione limacina II. Rhythmic neurons of pedal ganglia

1985 ◽  
Vol 58 (2) ◽  
Author(s):  
Yu.I. Arshavsky ◽  
I.N. Beloozerova ◽  
G.N. Orlovsky ◽  
Yu.V. Panchin ◽  
G.A. Pavlova
Keyword(s):  
Marine Mollusc ◽  
Clione Limacina
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