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Related Experiment Videos

Development of the human mesencephalic trigeminal nucleus: a morphometric study.

S Hamano1, N Goto, T Nara

  • 1Division of Neurology, Saitama Children's Medical Centre, Japan.

Developmental Medicine and Child Neurology
|July 1, 1990
PubMed
Summary

The human mesencephalic trigeminal nucleus grows in length and neuronal area during development. Neuronal shape and number remain stable from gestation through adulthood.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Human Anatomy

Background:

  • The mesencephalic trigeminal nucleus (MTN) is a unique structure in the central nervous system.
  • Understanding its developmental trajectory is crucial for comprehending neural development.

Purpose of the Study:

  • To quantitatively and qualitatively assess the anatomical development of the human mesencephalic trigeminal nucleus.
  • To analyze changes in MTN morphology from fetal to adult stages.

Main Methods:

  • Utilized serial brain sections from fetuses (16-27 weeks gestation), neonates (30-40 weeks gestation), an infant, and an adult.
  • Employed computer-assisted image analysis for morphometric assessments.

Main Results:

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  • Orocaudal columnar length and neuronal areas of the MTN progressively increased with gestational age.
  • Neuronal diversity in area emerged after 32 weeks gestation.
  • Neuronal number and shape exhibited minimal alterations across prenatal and postnatal life.

    • Conclusions:

    • The human mesencephalic trigeminal nucleus undergoes significant growth in size and complexity during development.
    • Key developmental milestones, such as neuronal area diversification, occur in late gestation.
    • The fundamental structure of MTN neurons is established early and remains consistent throughout life.