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Three Developmental Domains01:29

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Human development is typically examined across three main domains: physical, cognitive, and socio-emotional. These domains represent the significant areas of change and continuity throughout the lifespan, from infancy to late adulthood.
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The development of the human heart, a crucial organ, commences from the mesoderm on the 18th or 19th day after fertilization. This process initiates in the cardiogenic area, a group of mesodermal cells at the embryo's head end, which evolves into elongated strands known as cardiogenic cords. These cords undergo a transformation to form hollow-centered endocardial tubes.
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The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
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Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the...
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Children master language quickly and with relative ease, supported by both biological predisposition and reinforcement. B. F. Skinner (1957) proposed that language is learned through reinforcement, while Noam Chomsky (1965) argued that language acquisition mechanisms are biologically determined.
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Neurodevelopmental Reflex Testing in Neonatal Rat Pups
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The developing brain by trimester.

Paul Govaert1, Fabio Triulzi2, Jeroen Dudink3

  • 1Department of Neonatology, Erasmus University Medical Center, Rotterdam, The Netherlands; Department of Neonatology, ZNA Middelheim, Antwerp, Belgium; Department of Rehabilitation and Physical Therapy, Gent University Hospital, Gent, Belgium.

Handbook of Clinical Neurology
|August 2, 2020
PubMed
Summary
This summary is machine-generated.

Transient fetal brain structures are crucial for developing brain regions and networks. Key developmental milestones include early thalamocortical connections and myelination by 24 weeks postmenstrual age.

Keywords:
BrainCerebellumDevelopmentFetusMatrix

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Human Anatomy

Background:

  • Transient anatomical entities are vital for fetal brain maturation and network formation.
  • Major brain subdivisions are visible by 7 weeks postmenstrual age (PMA).
  • The developing brain exhibits complex structural and functional changes throughout gestation.

Purpose of the Study:

  • To detail the transient anatomical structures and developmental milestones in the human fetal brain.
  • To describe the progression of brain development from early gestation to near-term.

Main Methods:

  • Descriptive analysis of fetal brain development based on postmenstrual age.
  • Identification of key anatomical structures and their developmental timelines.

Main Results:

  • By 7 weeks PMA, major brain subdivisions, cortical plate, and early thalamocortical connections are present.
  • By 24 weeks PMA, white matter tracts are developing, myelination is observed in spinal cord regions, and transient layers form in the neopallium.
  • Between 24 and 32 weeks PMA, primary sulci develop, and myelination extends to specific brainstem tracts.

Conclusions:

  • Transient structures significantly contribute to fetal brain organization and functional network establishment.
  • The human fetal brain undergoes rapid and complex development, with distinct milestones occurring at specific gestational ages.