Giant Fiber System
Giant Fiber System - Related Videos
12:53
Electrophysiological Recordings from the Giant Fiber Pathway of D. melanogaster
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Cited by 17 •
2011
The Giant Fiber System is a simple neuronal circuit of adult Drosophila melanogaster containing the largest neurons in the fly. We describe the protocol for monitoring synaptic transmission through this pathway by recording post synaptic potentials in dorsal longitudinal (DLM) and tergotrochanteral (TTM) muscles following direct stimulation of the Giant Fiber interneurons.
09:39
Paired Nanoinjection and Electrophysiology Assay to Screen for Bioactivity of Compounds using the Drosophila melanogaster Giant Fiber System
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Cited by 6 •
2012
A rapid in vivo assay to test for neuromodulatory compounds using the Giant Fiber System (GFS) of Drosophila melanogaster is described. Nanoinjections in the head of the animal along with electrophysiological recordings of the GFS can reveal bioactivity of compounds on neurons or muscles.
11:12
Whole Mount Preparation of the Adult Drosophila Ventral Nerve Cord for Giant Fiber Dye Injection
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Cited by 21 •
2011
An in vivo dissection of the adult Drosophila ventral nerve cord (VNC) is demonstrated. This particular dissection method causes little damage to the VNC allowing the subsequent labeling of the giant fiber neurons with fluorescent dye for high resolution imaging.
02:35
Single-Cell Culture of Bacteria Within Giant Vesicles
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2025
Source: Morita, M., et al. Bacterial Cell Culture at the Single-cell Level Inside Giant Vesicles. J. Vis. Exp. (2019).This video demonstrates a method for culturing and observing individual bacterial cells encapsulated inside giant vesicles anchored to a supported lipid bilayer. The system enables stable, long-term imaging of single-cell growth dynamics in a confined, physiologically relevant microenvironment.
05:43
Preparation of Giant Vesicles Encapsulating Microspheres by Centrifugation of a Water-in-oil Emulsion
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Cited by 13 •
2017
Giant vesicles containing highly packed micrometer-sized components are useful cell models. The water-in-oil emulsion centrifugation method is a simple, powerful tool for the preparation of giant vesicles with encapsulated materials.
FAQs
Response speed depends on how efficiently signals cross synapses and how readily participating neurons generate electrical activity. Synaptic transmission determines the delay between connected cells, while neuronal excitability influences whether incoming signals produce a strong, timely response. Studying both factors helps explain variation in escape timing and links cellular physiology to the speed of coordinated behavior.
Because individual neurons can be recognized across experiments, researchers can relate specific cellular connections to defined behavioral outputs. This organization supports analysis of neural connectivity and synaptic physiology without treating the circuit as an indistinguishable network. The result is a tractable system for connecting microscopic mechanisms with motor control and whole-animal behavior.
The circuit provides a relatively direct way to examine how sensory information is transformed into motor action. Researchers can consider activity at the level of synapses and neurons, then relate it to leg and wing movements during escape. This multilevel connection makes the system valuable for testing how nervous systems generate fast, coordinated behaviors.
Two central variables are synaptic transmission and neuronal excitability. Changes in either can alter how quickly signals pass through the circuit or whether downstream neurons respond effectively. Examining these factors allows researchers to interpret differences in response timing and to distinguish effects arising from communication between neurons from those arising within the neurons themselves.
Studies can focus on the circuit’s identifiable neurons and their synaptic connections, examining how signals move from sensory pathways through interneurons to motor neurons. These analyses reveal the organization and functional behavior of the network. By relating the cellular findings to escape responses, investigators assess how particular connections contribute to motor control.
In Drosophila, the circuit contains relatively simple, identifiable neurons that can be related to leg and wing movements. This combination makes it practical to examine connectivity, synaptic physiology, and behavior within one experimental system. Findings from the model help researchers study how cellular properties support coordinated actions and how neural circuits adapt.
The system provides a framework for asking how neural circuits change with experience or across evolutionary contexts. Researchers can compare circuit properties, synaptic function, and behavioral outcomes to investigate behavioral plasticity and circuit adaptation. Its defined organization helps connect changes at the cellular level with differences in whole-animal escape behavior.