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Development of the human lateral cuneate nucleus: a morphometric evaluation
Xiaoxin Ma1, Noboru Goto, Jun Goto
1Department of Anatomy, Showa University School of Medicine, 5-8, Hatanodai 1, Shinagawa-Ku, Tokyo, 142-8555, Japan.
Brain Research. Developmental Brain Research
|May 31, 2002
Summary
The human lateral cuneate nucleus shows a key developmental shift around 30 weeks gestation, marked by significant changes in neuron size and neural connections essential for upper body movement.
Area of Science:
- Neuroscience
- Developmental Biology
- Human Anatomy
Background:
- The lateral cuneate nucleus is crucial for motor control, relaying sensory information to the cerebellum.
- Understanding its developmental trajectory is key to comprehending motor system maturation.
Purpose of the Study:
- To investigate the morphometric development of the human lateral cuneate nucleus from fetal stages to adulthood.
- To identify critical developmental milestones in the lateral cuneate nucleus.
Main Methods:
- Analysis of serial brain sections from fetuses, neonates, an infant, and an adult.
- Microscopic examination and image analysis to measure nuclear volume, neuron count, cell body area, and perimeter.
- Quantitative morphometric evaluation.
Main Results:
- A significant developmental turning point in the lateral cuneate nucleus was observed around 30 weeks of gestation (WG).
- Post-30 WG, there was a gradual increase in average neuron area and perimeter.
- The neuropil index showed a sharp increase at 30 WG, followed by a decrease.
Conclusions:
- The human lateral cuneate nucleus undergoes substantial morphometric changes during late gestation and early infancy.
- Developmental milestones around 30 WG are critical for establishing neuronal connections necessary for upper body motor function.