Olfactory Magnetic Tether
Olfactory Magnetic Tether - Related Videos
09:27
A Magnetic Tether System to Investigate Visual and Olfactory Mediated Flight Control in Drosophila
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Cited by 32 •
2008
Here we describe how to tether a fly in an olfactory magnetic-tether (OMT) apparatus. We describe how to align the rare-earth magnets and odor ports, and how to set mass flow rates for both the stimulus delivery and vacuum suction to achieve optimal odor tracking.
07:42
A Simple Flight Mill for the Study of Tethered Flight in Insects
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Cited by 37 •
2015
Flight in insects is influenced by a number of factors and the propensity to disperse is an important variable in understanding insect ecology and biological control strategies. We describe the construction and use of a simple, relatively inexpensive, and flexible flight mill for measuring parameters of tethered flight in insects.
07:23
Using Insect Electroantennogram Sensors on Autonomous Robots for Olfactory Searches
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Cited by 49 •
2014
We describe a protocol for using insect antennae in the form of electroantennograms (EAGs) on autonomous robots. Our experimental design allows stable recordings within a day and resolves individual odor patches up to 10 Hz. The efficiency of EAG sensors for olfactory searches is demonstrated in driving a robot toward an odor source.
06:32
Quadruple Immunostaining of the Olfactory Bulb for Visualization of Olfactory Sensory Axon Molecular Identity Codes
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2017
Olfactory sensory neurons express a wide variety of axon-sorting molecules to establish proper neural circuitry. This protocol describes an immunohistochemical staining method to visualize combinatorial expressions of axon-sorting molecules at the axon termini of olfactory sensory neurons.
11:41
Magnetic Tweezers for the Measurement of Twist and Torque
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Cited by 16 •
2014
Magnetic tweezers, a powerful single-molecule manipulation technique, can be adapted for the direct measurements of the twist (using a configuration called freely-orbiting magnetic tweezers) and torque (using a configuration termed magnetic torque tweezers) in biological macromolecules. Guidelines for performing such measurements are given, including applications to the study of DNA and associated nucleo-protein filaments.
FAQs
The magnetic element provides the connection between the animal and the tether, while an external magnetic field determines where the subject can be positioned or how it can move. Adjusting that field creates a controlled physical context for odor presentation. This helps investigators examine behavioral responses without allowing unrestricted locomotion to dominate the measurement.
Unrestricted movement can introduce variation unrelated to sensory processing, making responses harder to compare. By restraining or positioning the subject, an olfactory magnetic tether narrows the measured outcome to actions such as orientation, attraction, avoidance, or behavioral-state changes. Researchers can therefore relate odor exposure more consistently to observable behavior under defined experimental conditions.
The assay can quantify several response categories, including odor-guided orientation, attraction, avoidance, and changes in behavioral state. These outcomes describe different ways an animal may react after odorants are presented. Measuring them within the same controlled arrangement supports analysis of how sensory information is associated with direction, preference, rejection, or broader shifts in behavior.
A typical arrangement includes a lightweight magnetic element attached to the subject, a tether, an external magnetic field, and odorants presented under defined conditions. The field establishes the subject’s location or movement constraints while the odor exposure is controlled. Keeping these elements coordinated improves consistency when behavioral responses are recorded and compared.
Researchers can present odorants under defined conditions while maintaining the subject’s position or movement with the magnetic field. They then compare measurable outcomes such as orientation, attraction, avoidance, or behavioral-state changes across odor exposures. Because the physical arrangement remains controlled, differences in observed actions can be more directly associated with the odor conditions being tested.
The technique links a defined odor exposure to a measurable action, providing a behavioral window into olfactory sensory processing. It can show how detected odors correspond with directional responses, attraction, avoidance, or altered behavioral state. In biology, this connection helps investigators study sensory-guided behavior with greater experimental consistency than observations based only on unrestricted movement.