Active electrogenesis of command neurons of defense behavior of the snail during conditioning

1992 ◽  
Vol 22 (5) ◽  
pp. 380-385
Author(s):  
N. V. Babkina ◽  
L. E. Tsitolovskii
Keyword(s):  
Command Neurons ◽  
Defense Behavior

Divergent Connectivity of Homologous Command Neurons Mediates Segment-Specific Touch Responses in Drosophila

2018 ◽  
Author(s):  
Suguru Takagi ◽  
Benjamin Thomas Cocanougher ◽  
Sawako Niki ◽  
Dohjin Miyamoto ◽  
Hiroshi Kohsaka ◽  
...  
Keyword(s):  
Command Neurons

scholarly journals Corticostriatal control of defense behavior in mice induced by auditory looming cues

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Zhong Li ◽  
Jin-Xing Wei ◽  
Guang-Wei Zhang ◽  
Junxiang J. Huang ◽  
Brian Zingg ◽  
...  
Keyword(s):  
Essential Role ◽  
Neural Circuits ◽  
Temporal Dynamics ◽  
Defense Behavior ◽  
Innate Defense ◽  
Sensory Inputs ◽  
Corticostriatal Projections ◽  
Behavioral Transition ◽  
Auditory Looming

AbstractAnimals exhibit innate defense behaviors in response to approaching threats cued by the dynamics of sensory inputs of various modalities. The underlying neural circuits have been mostly studied in the visual system, but remain unclear for other modalities. Here, by utilizing sounds with increasing (vs. decreasing) loudness to mimic looming (vs. receding) objects, we find that looming sounds elicit stereotypical sequential defensive reactions: freezing followed by flight. Both behaviors require the activity of auditory cortex, in particular the sustained type of responses, but are differentially mediated by corticostriatal projections primarily innervating D2 neurons in the tail of the striatum and corticocollicular projections to the superior colliculus, respectively. The behavioral transition from freezing to flight can be attributed to the differential temporal dynamics of the striatal and collicular neurons in their responses to looming sound stimuli. Our results reveal an essential role of the striatum in the innate defense control.

Segmental differences in pathways between crayfish giant axons and fast flexor motoneurons

1985 ◽  
Vol 53 (1) ◽  
pp. 252-265 ◽  
Author(s):  
L. A. Miller ◽  
G. Hagiwara ◽  
J. J. Wine
Keyword(s):  
High Probability ◽  
Behavior Pattern ◽  
Excitatory Input ◽  
Conclusive Evidence ◽  
Spatial Patterning ◽  
Command Neurons ◽  
Additional Input ◽  
Premotor Neurons ◽  
Escape Trajectories ◽  
Escape Responses

We have used electrophysiological techniques to document segmental differences in the pathways between the giant, escape command axons, lateral giants (LG) and medial giants (MG), and the nongiant, fast flexor (FF) motoneurons. We found no difference in the input from LG and MG axons to FF motoneurons in the posterior (4th and 5th) ganglia. Since flexor motor output in these segments would be inconsistent with the LG-evoked behavior pattern, this finding was puzzling. Electromyographic (EMG) recordings during escape responses by intact unrestrained animals confirm that the FF muscles innervated by the posterior ganglia are not excited during LG-mediated tailflips, but are excited during MG-mediated tailflips. In the 2nd and 3rd ganglia, the command axons fire the FF motoneurons with high probability, in part via electrical excitatory postsynaptic potentials (EPSPs) from premotor neurons, the segmental giants (SG). In the 4th and 5th ganglia, the equivalent pathway is much less effective. Single, directly elicited impulses in SGs in ganglia 2 and 3 fire their respective FF motoneurons with high probability, while those in ganglia 4 and 5 rarely fire FF motoneurons. The command axons fire the SGs reliably in all segments. The amplitude of the SG-evoked EPSP in FF motoneurons is significantly smaller in posterior vs. anterior ganglia. For technical reasons, we are unable to present conclusive evidence on ganglionic variations in FF-motoneuron thresholds. The FF motoneurons receive additional excitatory input from intersegmental interneurons recruited by the command neurons. Motoneurons in ganglia 4 and 5 are excited by large interneurons that do not synapse on motoneurons in ganglia 2 and 3, but this additional input is not sufficient to compensate for the weaker effect of SG input. Unlike the all-or-none segmental differences demonstrated previously for the LG-to-motor giant pathway (24), the SG-to-FF pathway changes gradually, retains significant though subthreshold strength in posterior ganglia, and is common to both LGs and MGs. These features provide opportunities for variation in the spatial patterning of flexion and in the resulting escape trajectories.

scholarly journals Sensory-Motor Transformation by Individual Command Neurons

2007 ◽  
Vol 27 (5) ◽  
pp. 1024-1032 ◽  
Author(s):  
P. V. Zelenin ◽  
G. N. Orlovsky ◽  
T. G. Deliagina
Keyword(s):  
Command Neurons ◽  
Sensory Motor

Implementasi Kebijakan Pendidikan (Budaya) Bela Negara: Studi Kasus SD Katolik Karya Toboali, Kepulauan Bangka Belitung

Inovasi ◽  
2021 ◽  
Vol 18 (2) ◽  
pp. 149-167
Author(s):  
Fatkhuri Fatkhuri
Keyword(s):  
Elementary School ◽  
School Culture ◽  
Defense Policy ◽  
The State ◽  
Main Character ◽  
Defense Behavior ◽  
Modeling Approach ◽  
State Defense ◽  
Assessment Results ◽  
Descriptive Qualitative

This study aims to grasp the policy of state defense which embedded through the form of school culture which plays an important role to shape the character of state defense in Katolik Karya, Toboali Elementary School, Bangka Belitung. This also seeks to capture how state defense culture is effectivelly implemented to support the students’ character. This study uses descriptive qualitative, in which data and information are obtained through interviews, questionnaires, and documents involving principals, teachers, education staff, and students. This study found that the school already has developed policy to instill a state defense culture which is introduced by the Tunas Karya Foundation. The state defense policy is developed through a set of values which are arranged in the ten main character as a genuine of cultural product to form of student character. Schools conduct a state defense policy through habituation with a nurturing and modeling approach by teachers. This study also shows that the habituation of the ten main character values in making state defense behavior is quite effective. Based on the assessment results, the data shows that the majority of students have regularly employed the habituation of the state defense with average marks at 82 point.

Escape Swim Network Interneurons Have Diverse Roles in Behavioral Switching and Putative Arousal in Pleurobranchaea

2000 ◽  
Vol 83 (3) ◽  
pp. 1346-1355 ◽  
Author(s):  
Jian Jing ◽  
Rhanor Gillette
Keyword(s):  
Escape Response ◽  
Motor Output ◽  
Pedal Ganglion ◽  
Command Neurons ◽  
Food Avoidance ◽  
Sea Slug ◽  
Behavioral Switching ◽  
Arousal System ◽  
Direct Suppression ◽  
Stimulation Of

Escape swimming in the predatory sea slug Pleurobranchaea is a dominant behavior that overrides feeding, a behavioral switch caused by swim-induced inhibition of feeding command neurons. We have now found distinct roles for the different swim interneurons in acute suppression of feeding during the swim and in a longer-term stimulation of excitability in the feeding network. The identified pattern-generating swim neurons A1, A3, A10, and their follower interneuron A-ci1, suppress feeding motor output partly by excitation of the I1 feeding interneurons, which monosynaptically inhibit both the feeding command neurons, PCP, PSE, and other major interneurons, the I2s. This mechanism exerts broad inhibition of the feeding network suitable to an escape response; broader than feeding suppression in learned and satiation-induced food avoidance and acting through a different presynaptic pathway. Four intrinsic neuromodulatory neurons of the swim network, the serotonergic As1–4, add little to direct suppression of feeding. Rather, they monosynaptically excite the serotonergic metacerebral giant (MCG) neurons of the feeding network, themselves intrinsic neuromodulators of feeding, as well as a cluster of adjacent serotonergic feeding neurons, with both fast and slow EPSPs. They also provide mild neuromodulatory excitation of the PCP/PSE feeding command neurons, and I1 and I2 feeding interneurons, which is masked by inhibition during the swim. As1–4 also excite the serotonergic pedal ganglion G neurons for creeping locomotion. These observations further delineate the nature of the putative serotonergic arousal system of gastropods and suggest a central coordinating role to As1–4.

Higher order neurons in buccal ganglia of Pleurobranchaea elicit vomiting motor activity

1983 ◽  
Vol 50 (3) ◽  
pp. 658-670 ◽  
Author(s):  
A. D. McClellan
Keyword(s):  
High Frequency ◽  
Motor Pattern ◽  
Higher Order ◽  
Root Activity ◽  
Command Neurons ◽  
Sensory Inputs ◽  
Buccal Ganglia ◽  
Output Pattern ◽  
Stimulation Of

The buccal mass of the gastropod Pleurobranchaea is used during a regurgitation response that consists of a writhing phase interrupted by brief periodic bouts of a vomiting phase (17, 20). During transitions from writhing to vomiting, specific changes occur in the motor pattern (19, 20). Evidence is presented suggesting that at least some of the initiation or "command" neurons for vomiting reside in the buccal ganglia. The present paper examines the role of two candidate vomiting-initiation cells, the ventral white cells (VWC) and midganglionic cells (MC), in the buccal ganglia of isolated nervous systems. Stimulation of single VWCs activates a vomiting motor pattern, consisting in part of alternating buccal root activity. Furthermore, the VWCs fire in high-frequency bursts during episodes (i.e., bouts) of this same vomiting pattern. Mutual reexcitation between the VWCs and motor pattern generator (MPG) appears to produce the accelerated buildup and maintenance of vomiting rhythms. Brief stimulation of single MCs "triggers" bouts of a vomiting motor pattern, but the membrane potential of this cell is only modulated during this same pattern, at least in the isolated nervous system. It is proposed that in intact animals the MCs are activated by sensory inputs and briefly excite the VWC-MPG network, thereby turning on the mutual reexcitatory mechanism mentioned above and switching the output pattern. A general implication for gastropod research is that higher order neurons that activate buccal root activity cannot automatically be given the function of "feeding command neuron," as some cells clearly control other responses, such as vomiting.

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