Asymmetry of the Developing Brain, Structural Anomalies, and Genetic Variants in the Pathogenesis of Unilateral Spastic Cerebral Palsy (uCP), a Common Neurological Symptom in Intellectual Disability, is Discussed in the form of a Narrative Overview
Bibliographic record
Abstract
Asymmetrical form and structural features of the brain can occur both as physiological hemispheric differences and as pathological left-right disparities. This review starts with findings on physiological brain development. It focuses primarily on non-physiological asymmetries between the left and right brain hemispheres and their impact on brain function, particularly motor functions. These are discussed in the context of cerebral palsy, specifically unilateral cerebral palsy, with a particular emphasis on genetic aspects. Pathogenic variants in specific genes can have diverse effects on structural brain development and, consequently, brain function. Several groups of genes must be distinguished based on their impact on the developing brain. These include variants in genes related to the coagulation system, angiogenesis, mitochondrial functions, and oxidative phosphorylation, which contribute to encephaloclastic lesions in the developing brain (e.g., periventricular or subcortical leukomalacia). These are distinct from gene variants that lead to disruptions in neuronal induction, proliferation, migration, aggregation, differentiation, and synaptic connectivity. Neurological symptoms, such as the development of spastic hemiparesis/cerebral palsy, can arise from genetically caused structural-functional disorders at both macroscopic (e.g., hemimegalencephaly) and microscopic levels (e.g., synaptic scaffolding). Additionally, disruptions in the structure and function of perineuronal networks must also be considered in this context. The ultimate goal of this review is to describe and discuss the pathways involved in the pathogenesis of unilateral cerebral palsy in a differentiated manner, with a particular focus on molecular genetic aspects.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".