Neonatal Lewis Rats
Neonatal Lewis Rats - Related Videos
07:05
Isolation and Cryopreservation of Neonatal Rat Cardiomyocytes
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Cited by 49 •
2015
The isolation of neonatal rat cardiomyocytes is a time consuming and unpredictable procedure. This study describes methods for cryopreservation and thawing of neonatal rat cardiomyocytes that allows for more efficient use of cells. The thawed NRCMs can be used for various experiments without the need for performing isolations each time.
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.
02:33
Lewis Acids and Bases
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2020
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond. A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
02:36
Lewis Symbols and the Octet Rule
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2020
Chemical bonds are complex interactions between two or more atoms or ions, which reduce the potential energy of the molecule. Gilbert N. Lewis developed a model called the Lewis model that simplified the depiction of chemical bond formation and provided straightforward explanations for the chemical bonds seen in most common compounds. Lewis Model The Lewis model depicts chemical bond formation by the sharing or transfer of valence electrons, which helps to attain a stable electron...
08:03
Recording EEG in Freely Moving Neonatal Rats Using a Novel Method
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Cited by 3 •
2017
Here, we introduce a novel technique designed to record electroencephalography (EEG) in freely moving neonatal epileptic pups and describe its procedures, features, and applications. This method allows one to record EEG for more than 1 week.
FAQs
Postnatal development reflects linked changes across neural, endocrine, immune, and metabolic systems rather than isolated organ growth. These systems influence one another as the animal adapts to life after birth, so measurements taken at different ages can reveal changing relationships among regulatory processes. This integrated perspective helps researchers interpret developmental trajectories instead of treating each physiological finding as independent.
An inbred genetic background helps reduce biological variability between animals used in a study. With fewer genetic differences contributing to measured outcomes, researchers can more clearly examine effects associated with age, rearing conditions, or experimental exposure. This does not eliminate all variation, because developmental stage and environment still matter, but it can strengthen comparisons within carefully controlled experiments.
Age, rearing conditions, and experimental exposures can all affect the observed maturation of neonatal physiology. Age-specific design is particularly important because neural, endocrine, immune, and metabolic functions are changing after birth. Controlling these factors allows investigators to distinguish normal developmental shifts from responses associated with a treatment or early-life condition, improving interpretation of later outcomes.
Researchers use age-specific measurements to compare physiological status across defined points in the early postnatal period. Controlled rearing provides a consistent context, while selected assessments can track maturation across neural, endocrine, immune, or metabolic functions. Comparing these measurements over time helps identify developmental patterns and examine whether an early-life exposure changes the expected trajectory.
A study generally defines the relevant postnatal ages, establishes controlled rearing conditions, selects measurements suited to the developmental question, and applies any planned experimental exposure. Investigators then compare age-related findings across the designated groups. Age-appropriate design and careful welfare practices are essential because both handling conditions and developmental stage can influence the reliability and ethical acceptability of the results.
This model supports investigations of developmental biology, maternal and neonatal health, immune responses, neurobiology, and disease mechanisms. Its value lies in examining how physiology changes after birth and how early-life conditions may influence later outcomes. The model can therefore connect neonatal observations with broader questions about maturation, vulnerability, and the biological consequences of early developmental environments.
Researchers can compare age-specific physiological measurements from animals exposed to defined early-life conditions with measurements from appropriately controlled groups. Examining neural, endocrine, immune, or metabolic outcomes may show whether development follows an expected pattern or diverges after exposure. Such comparisons can help clarify mechanisms linking neonatal environments with later biological outcomes, while welfare safeguards guide study design.
Studies using neonatal Lewis rats can examine how conditions surrounding the early postnatal period relate to developing physiology and later health-related outcomes. Measurements across maturation may provide context for immune, metabolic, neural, or endocrine changes associated with maternal and neonatal health questions. Findings are most informative when researchers maintain controlled conditions and interpret results within the model's developmental stage.