Anesthetized Animal Injection
Anesthetized Animal Injection - Related Videos
07:54
Applying Stereotactic Injection Technique to Study Genetic Effects on Animal Behaviors
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Cited by 15 •
2015
Stereotactic injection of lentiviruses expressing cDNAs or shRNAs can modulate gene expression in specific brain areas of mice. Here, we present a protocol to combine stereotactic injections with behavioral tasks, such as the Open Field Test (OFT) and the Forced Swim Test (FST).
09:42
Injections of AAV Vectors for Optogenetics in Anesthetized and Awake Behaving Non-Human Primate Brain
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Cited by 4 •
2021
As currently implemented, optogenetics in non-human primates requires injection of viral vectors into the brain. An optimal injection method should be reliable and, for many applications, capable of targeting individual sites of arbitrary depth that are readily and unambiguously identified in postmortem histology. An injection method with these properties is presented.
08:27
Establishment of a Valuable Mimic of Alzheimer's Disease in Rat Animal Model by Intracerebroventricular Injection of Composited Amyloid Beta Protein
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Cited by 15 •
2018
This is a protocol to mimic Alzheimer's Disease in rats by evaluation of spatial memory impairment, neuronal pathological changes, neuronal amyloid beta protein (Aβ) burden, and neurofibrillary tangles aggregation, induced by the injection of Aβ25-35 combined with aluminum trichloride and recombinant human transforming growth factor-β1.
08:49
Assessing Changes in Volatile General Anesthetic Sensitivity of Mice after Local or Systemic Pharmacological Intervention
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Cited by 23 •
2013
Loss of the righting reflex has long served as a standard behavioral surrogate for unconsciousness, also called hypnosis, in laboratory animals. Alterations in volatile anesthetic sensitivity caused by pharmacological interventions can be detected with a carefully controlled high-throughput assessment system, which may be adapted for delivery of any inhaled therapeutic.
05:45
Recording Large-scale Neuronal Ensembles with Silicon Probes in the Anesthetized Rat
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Cited by 24 •
2011
Extracellular recordings of neuronal activity using silicon probes in the anesthetized rat will be described. This technique allows information to be obtained across multiple brain areas from more than 100 neurons simultaneously. It provides information with single cell resolution about neuronal ensembles dynamics in multiple local circuits.
FAQs
Injection volume, delivery rate, and route jointly shape how much tissue is exposed and how widely the delivered substance distributes. Consequently, changing one parameter can alter the effective neural region reached, even when the same drug, tracer, or vector is used. Researchers standardize these variables when comparing animals so that differences in physiology or behavior are more interpretable.
Stereotaxic coordinates convert a desired brain target into a guided needle placement. A syringe or cannula can then deliver material to that defined region rather than relying on imprecise placement. This targeting is especially important when the experiment aims to manipulate or label a particular neural circuit, because location directly affects which tissue receives exposure.
Anesthesia limits consciousness and movement while the injection is performed, supporting a controlled intervention. The anesthetic regimen and dose therefore require deliberate selection and monitoring. Consistent management helps protect animal welfare and reduces procedural variation, which is important when later measurements depend on comparable interventions across subjects.
A typical workflow begins with administering and monitoring the anesthetic regimen, followed by preparing a sterile syringe or cannula. When a defined brain region is required, the delivery system is positioned using stereotaxic coordinates, and the selected substance is injected with a specified volume and rate. Monitoring continues through the procedure, followed by recovery observations.
Sterility, delivery hardware, and dosing parameters are central practical controls. The syringe or cannula provides the route for introducing drugs, tracers, viral vectors, or other substances, while the planned volume and rate determine exposure and distribution. Maintaining consistent equipment and settings helps distinguish biological effects from variation introduced by the injection itself.
Researchers select this approach for localized neural manipulation or labeling, disease modeling, therapeutic delivery, and measurement of downstream physiology or behavior. The injected material determines the experimental purpose: tracers can support neural-circuit labeling, whereas drugs or viral vectors can enable targeted interventions. The same procedural framework therefore serves several neuroscience research goals.
Interpretation depends on separating the intended neural effect from procedural influences. Researchers should relate physiological or behavioral findings to the targeted region, injected substance, volume, rate, route, and anesthesia management. Recovery monitoring also matters because recovery procedures contribute to reproducibility and animal welfare. Recording these conditions strengthens conclusions about how the intervention produced the measured outcome.