Pup Anesthesia
Pup Anesthesia - Related Videos
09:47
Anesthesia and Intubation of Preadolescent Mouse Pups for Cardiothoracic Surgery
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2022
Cardiothoracic surgical models in mice >7 days old require intubation, but this is challenging for preadolescent (8-14-day-old) mouse pups and there is little information on anesthetic regimens for intubation. Here, we present dosage regimens of ketamine/xylazine/atropine in 10-day-old C57BL/6J mouse pups that allow endotracheal intubation, while minimizing animal mortality.
02:34
Long-Term Continuous Electroencephalography Monitoring in a Rodent Pup
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2025
The video demonstrates long-term continuous electroencephalography (EEG) monitoring in rodent pups using a wireless transmitter system. The transmitter contains two recording electrodes and one reference electrode extending to the brain's surface. Upon placing the pup in a recording chamber, EEG can be continuously monitored throughout the pup's development into adulthood.
03:26
Transplantation of Interneuron Precursor Cells into the Brain of a Mouse Pup
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2025
Source: Quattrocolo, G., et al. Homochronic Transplantation of Interneuron Precursors into Early Postnatal Mouse Brains. J. Vis. Exp. (2018)This video demonstrates the transplantation of interneuron precursor cells into the neonatal mouse brain using either a homotopic or heterotopic approach. The procedure involves securing an anesthetized recipient pup, identifying the target brain region, and injecting a suspension of precursor cells derived from a donor pup at the same developmental stage.
04:15
Stereotactic Microinjection of a Viral Vector for Gene Manipulation in a Mouse Pup Striatum
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2025
Source: Chen, S., et al., Stereotaxic Surgery for Genetic Manipulation in Striatal Cells of Neonatal Mouse Brains. J. Vis. Exp. (2018)This video demonstrates the stereotaxic injection of a viral vector encoding Cre recombinase and green fluorescence protein or GFP into the striatum of a genetically modified mouse pup to achieve gene manipulation by excising a loxP-flanked STOP cassette, activating red fluorescence protein or RFP as a reporter.
09:35
Neurodevelopmental Reflex Testing in Neonatal Rat Pups
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Cited by 77 •
2017
Behavioral testing is the gold standard for determining outcomes following brain injury, and can identify the presence of developmental disabilities in infants and children. Neurodevelopmental reflexes are an early indicator of these abnormalities. A host of easily accomplished developmental reflex tests in the neonatal rodent were developed and described here.
FAQs
Anesthetic agents reduce central nervous system activity by changing neuronal excitability and synaptic transmission. These effects limit the propagation of neural signals, contributing to reduced movement, pain perception, and responsiveness during a procedure. In neuroscience experiments, the same changes can directly influence measured neural activity, so anesthesia is both a procedural support and an experimental variable.
Young animals have developing nervous and respiratory systems, which can make their responses to anesthesia less predictable than those of mature animals. Consequently, researchers must monitor the animal carefully and adjust the dose as needed. These considerations help maintain the intended anesthetic state while reducing physiological stress and avoiding unnecessary effects on developing neural processes.
Because anesthesia suppresses neuronal activity and alters synaptic transmission, it can change the physiological signals that neuroscience studies measure. Its effects may therefore influence imaging, electrophysiological recordings, and interpretations of neural development. Researchers need to consider whether an observed result reflects the biological process under study, the anesthetic state, or an interaction between both.
Protocol selection should account for the animal's immature nervous and respiratory systems, the requirements of the procedure, and the potential effects of anesthesia on neural measurements. Researchers should also report the protocol carefully, including how anesthesia was maintained and adjusted. Clear reporting improves interpretation by showing how experimental conditions may have shaped physiological or neural outcomes.
A general workflow includes inducing the anesthetic state, maintaining it throughout the procedure, monitoring the animal, and adjusting the dose when necessary. This approach is relevant to surgery, tissue collection, imaging, and electrophysiological research. The specific protocol must support immobility and reduced stress while accounting for the developing physiology of young laboratory animals.
Researchers use pup anesthesia when a neuroscience procedure requires reduced pain, movement, or physiological stress in young laboratory animals. Supported applications include surgery, tissue collection, imaging, and electrophysiological studies. Its role varies with the procedure, but each application requires attention to how anesthetic suppression of neural activity could affect the data collected.
Anesthesia-related changes should be treated as part of the experimental context rather than ignored. Since anesthetic agents can influence neural activity, development, and physiological measurements, researchers should interpret findings alongside the selected protocol and its maintenance conditions. Careful comparison and reporting help distinguish procedure-related effects from the biological phenomena the study aims to investigate.