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Development of the human cerebellum observed with high-field-strength MR imaging
T Stricker1, E Martin, C Boesch
1Division of Magnetic Resonance, University Children's Hospital, Zurich.
Insights
This study defines five developmental stages of the human cerebellum using magnetic resonance imaging. These stages help determine normal cerebellar myelination patterns in pediatric subjects.
Area of Science:
- Neuroimaging
- Pediatric Neurology
- Developmental Biology
Background:
- Cerebellar development is crucial for motor function.
- Understanding normal myelination patterns aids in identifying developmental abnormalities.
Purpose of the Study:
- To establish normal developmental patterns of the human cerebellum using magnetic resonance (MR) imaging.
- To define five distinct developmental stages based on myelination.
- To provide age ranges for these stages for clinical application.
Main Methods:
- Retrospective analysis of 160 pediatric subjects (32-410 weeks post-conception).
- Utilized axial T2-weighted spin-echo MR images for optimal gray and white matter contrast.
- Defined five developmental stages based on observed myelination patterns.
Main Results:
- Five distinct developmental stages of cerebellar myelination were identified.
- Myelination of medial lemnisci and parasagittal cerebellum observed at term.
- Middle cerebellar peduncles and basilar pons myelinated before the corpus medullare of the cerebellum.
- Normal age ranges for each stage were statistically determined.
Conclusions:
- MR imaging provides a method to assess normal cerebellar development.
- The observed myelination sequence correlates with pathological findings but shows a 6-month lag.
- Established age ranges are valuable for routine MR image interpretation in pediatrics.
Abstract:
A retrospective study of 160 pediatric subjects, aged 32-410 weeks after conception, was conducted to determine the normal developmental patterns of the human cerebellum by means of magnetic resonance (MR) imaging. On the basis of axial T2-weighted spin-echo images (repetition time, 3,000 msec; echo time, 120 msec), which provided the best contrast between gray matter and white matter, five distinct developmental stages were defined. At term, the medial lemnisci as well as the parasagittal cerebellum were myelinated. The appearance of myelin in the middle cerebellar peduncles and the basilar pons preceded that in the corpus medullare of the cerebellum. The normal age ranges for the different stages were defined with statistical analysis. These ranges are applicable to the daily routine of image interpretation. The sequence of myelination in the cerebellum observed at MR imaging correlates with the known patterns observed in pathologic studies but lags behind by an average of 6 months.