Neuron Manipulation
Neuron Manipulation - Related Videos
12:47
Inducing Plasticity of Astrocytic Receptors by Manipulation of Neuronal Firing Rates
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Cited by 8 •
2014
Here we describe an adaptation of protocols used to induce homeostatic plasticity in neurons for the study of plasticity of astrocytic G protein-coupled receptors. Recently used to examine changes in astrocytic group I mGluRs in juvenile mice, the method can be applied to measure scaling of various astrocytic GPCRs, in tissue from adult mice in situ and in vivo, and to gain a better appreciation of the sensitivity of astrocytic receptors to changes in neuronal activity.
03:01
Drosophila Optogenetics: A Method to Manipulate Neuronal Circuits
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2023
Optogenetics enables the use of light to manipulate neurons that are genetically engineered to express specific opsins–light-sensitive proteins whose light activation triggers a change in the state of the neuron. Here we describe an optogenetic approach in Drosophila using the opsin Channelrhodopsin2. The example protocol features an optogenetics assay set to study the neuronal circuitry behind the fly's escape behavior.
10:45
Using Laser Tweezers For Manipulating Isolated Neurons In Vitro
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Cited by 2 •
2008
This video describes the manipulation of cultured neurons using laser tweezers in vitro.
10:02
Mechanical Manipulation of Neurons to Control Axonal Development
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Cited by 10 •
2011
Application and direct measurements of forces on neurons in the 2-1000 microdyne range are achieved with high precision using calibrated glass needles. This methodology can be used to control and measure several aspects of axonal development, including axonal initiation, axonal tension, velocity of axonal elongation, and force vectors.
09:07
Genetic Manipulation of Cerebellar Granule Neurons In Vitro and In Vivo to Study Neuronal Morphology and Migration
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Cited by 8 •
2014
Neuronal morphogenesis and migration are crucial events underlying proper brain development. Here, we describe methods to genetically manipulate cultured cerebellar granule neurons and the developing cerebellum for the assessment of morphology and migratory characteristics of neurons.
FAQs
Electrical stimulation changes a neuron's membrane potential, the voltage difference that influences whether the cell becomes active. This provides a direct way to perturb neuronal activity and examine resulting effects on circuits or behavior. By comparing responses with and without stimulation, researchers can test whether altered activity contributes to processes such as sensory processing, movement, or learning.
Optogenetics activates light-sensitive proteins, whereas chemogenetics engages engineered receptors. Both approaches provide ways to influence neuronal signaling, but they rely on different forms of control: light for optogenetics and receptor-targeting compounds for chemogenetics. Comparing these strategies helps researchers select a manipulation suited to the experimental question while distinguishing effects caused by changing neural activity from observational correlations.
Modifying gene expression changes the molecular state of neurons, allowing investigators to examine how cellular instructions influence neuronal function. This complements methods that directly alter membrane potential or signaling because it addresses molecular mechanisms rather than activity alone. Such experiments can connect changes inside neurons with altered circuit function, behavior, or processes relevant to neurological disease.
The central advantage is experimental intervention: researchers deliberately alter neuronal activity, signaling, connectivity, or molecular state and then examine the resulting outcome. If a controlled manipulation changes a behavior or neural function, the result provides evidence for a causal relationship rather than a simple correlation. This logic supports studies of learning, movement, sensory processing, and disease mechanisms.
A study begins by identifying the neural function or behavior of interest, then selecting a manipulation that targets the relevant level of biology. Electrical stimulation can change membrane potential, optogenetics can activate light-sensitive proteins, chemogenetics can engage engineered receptors, and gene-expression methods can alter molecular state. Researchers then compare outcomes to determine the effect of the intervention.
These methods are useful when researchers need to test whether particular neuronal activity or signaling contributes to a defined function. Manipulating relevant neurons while examining sensory processing, learning, or movement can reveal circuit contributions that observation alone cannot establish. The same experimental logic extends to neurological disease, where altered activity or molecular state may help identify mechanisms and intervention targets.
Results can identify relationships between neuronal circuits, molecular states, and disease-related functions. That information supports development of targeted therapies and circuit-based interventions by indicating which neural processes may be suitable for control or correction. Although the experiments primarily investigate mechanisms, their causal findings provide a scientific basis for designing approaches aimed at specific nervous-system dysfunctions.
Researchers can evaluate how an intervention affects neural function, signaling, connectivity, molecular state, or behavior, depending on the selected approach. Interpreting these outcomes requires relating the observed change to the specific level that was perturbed. For example, altered membrane potential addresses activity directly, while modified gene expression addresses molecular state, helping separate cellular, circuit, and behavioral consequences.