A developmental study of the mouse neostriatum

Area of Science:

• Neuroscience
• Developmental Biology

Background:

• The development of the neostriatum, a crucial brain region, is complex.
• Understanding its cellular and structural maturation is vital for neuroscience research.

Purpose of the Study:

• To comprehensively document the developmental timeline of the mouse neostriatum.
• To identify the emergence and maturation of key cellular components, including neurons and glial cells.

Main Methods:

• Utilized semithin sections, Golgi staining, and electron microscopy for detailed morphological analysis.
• Examined developmental stages from 11 days postconception to 180 days postnatum.

Main Results:

• Neostriatum visible by 12 days gestation; neuroblasts, glioblasts, and microglia identified by 13 days.
• Astrocyte processes seen at 15 days gestation; astrocytes mature by birth; oligodendrocytes appear 5 days postnatally.
• Neurons show differentiation by 5 days postnatally; dendritic spine density increases significantly between 5 and 90 days postnatally.

Conclusions:

• The mouse neostriatum undergoes extensive cellular differentiation and structural maturation during prenatal and postnatal development.
• Postnatal development, particularly dendritic spine formation, continues for an extended period, contributing to mature brain function.