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[Prenatal ontogenesis of the human brain cortex temporal area]
Rossiiskii Fiziologicheskii Zhurnal Imeni I.M. Sechenova
|October 5, 2007
Summary
The study details the prenatal development of human temporal cortex layers. Key findings show the evolving structure and cell density changes during fetal development, highlighting the subplate
Area of Science:
- Neuroscience
- Developmental Biology
- Human Embryology
Context:
- Investigates the prenatal development of the human temporal cortex.
- Examines the formation and differentiation of cortical layers during fetal development.
- Focuses on the period from 16-18 weeks to 27-33 weeks of gestation.
Purpose:
- To elucidate the spatiotemporal organization of the developing human temporal cortex.
- To characterize the sequential differentiation of cortical plate layers (eII-eVI).
- To identify developmental changes in the relative thickness of 'efferent' and 'associative' cortical layers.
Summary:
- Identified three distinct zones (marginal zone, cortex plate, subplate) in the fetal cortex at 16-18 weeks.
- Observed the division of the cortex plate into layers eII-eVI by 20-26 weeks, with efferent layers initially wider than associative layers.
- Documented the elimination of subplate neurons by 27-33 weeks, coinciding with associative layers comprising over 50% of cortex thickness.
Impact:
- Provides a detailed timeline of human temporal cortex layer formation during prenatal development.
- Establishes a cellular basis for understanding typical and atypical cortical development.
- Offers insights into the developmental trajectory of cortical structures crucial for higher cognitive functions.
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