Related Experiment Videos
Different developmental rates of selected brain structures in humans
1Laboratory of Developmental Neuropathology, Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland.
Acta Neurobiologiae Experimentalis
|January 1, 1996
Summary
Human central nervous system (CNS) structures mature at different rates. Morphometric analysis revealed varying neuronal density and size changes, highlighting distinct developmental timelines across brain regions.
Area of Science:
- Neuroscience
- Developmental Biology
- Human Anatomy
Background:
- The human central nervous system (CNS) exhibits differential maturation rates across its various structures.
- Observed differences in maturation are apparent between the brain stem and telencephalon, as well as in fetal and postnatal archi- and neocortex.
Purpose of the Study:
- To quantitatively describe the morphological and morphometric differences in the maturation of specific human CNS structures.
- To investigate developmental trajectories from midgestation to the 18th postnatal month.
Main Methods:
- Morphological and morphometric analysis was conducted on the dorsal vagal nucleus, Ammon's horn, and neocortex.
- Measurements included neuronal numerical density, cell perikarya size, nuclear cross-sectional area, and nucleus-to-perikaryon area ratio.
Main Results:
- A development-dependent decrease in neuronal density was observed across the studied CNS regions.
- Neuronal differentiation was evidenced by progressive changes in cell size.
- The rate of maturation varied significantly among the dorsal vagal nucleus, Ammon's horn, and neocortex.
Conclusions:
- The findings demonstrate distinct developmental rates for different human CNS structures.
- Neuronal maturation involves changes in cell density and size, occurring at differential paces throughout the brain.