Trait
Micrographia
Abnormally small-sized handwriting is formally defined as an impairment of fine motor skills, which mainly manifests as a progressive or stable reduction in amplitude during a writing task.
Summary
- Body system
- Abnormality of the nervous system
Reference genomeGRCh38hg38
Positions on gene and variant pages follow this choice, in this browser.
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Get my Genome Test21 genes linked to Micrographia
Changes in these genes cause rare conditions in which Micrographia is seen. Most people with this trait have none of those conditions, and a gene on this list says nothing about anyone's own genome.
| Gene | How often it is seen | Conditions |
|---|---|---|
| MAPTmicrotubule associated protein tau | Always | In 3 conditions |
| RAB32RAB32, member RAS oncogene family | Always | In 1 condition |
| VPS13Avacuolar protein sorting 13 homolog A | Sometimes (5–29%) | In 1 condition |
| ADH1Calcohol dehydrogenase 1C (class I), gamma polypeptide | Not recorded | In 1 condition |
| ATXN2ataxin 2 | Not recorded | In 1 condition |
| ATXN3ataxin 3 | Not recorded | In 1 condition |
| ATXN8OSATXN8 opposite strand lncRNA | Not recorded | In 1 condition |
| FTLferritin light chain | Not recorded | In 1 condition |
| GBA1glucosylceramidase beta 1 | Not recorded | In 1 condition |
| JAM2junctional adhesion molecule 2 | Not recorded | In 1 condition |
| MT-TTmitochondrially encoded tRNA-Thr (ACN) | Not recorded | In 1 condition |
| MYORGmyogenesis regulating glycosidase | Not recorded | In 1 condition |
| NAA60N-alpha-acetyltransferase 60, NatF catalytic subunit | Not recorded | In 1 condition |
| NR4A2nuclear receptor subfamily 4 group A member 2 | Not recorded | In 1 condition |
| PDGFBplatelet derived growth factor subunit B | Not recorded | In 1 condition |
| PDGFRBplatelet derived growth factor receptor beta | Not recorded | In 1 condition |
| SLC20A2solute carrier family 20 member 2 | Not recorded | In 1 condition |
| SNCAsynuclein alpha | Not recorded | In 1 condition |
| SNCAIPsynuclein alpha interacting protein | Not recorded | In 1 condition |
| TBPTATA-box binding protein | Not recorded | In 1 condition |
| XPR1xenotropic and polytropic retrovirus receptor 1 | Not recorded | In 1 condition |
How often is among people with one of the gene's conditions, the most often across them, as the Human Phenotype Ontology records it. These pages describe traits and the research behind them; they are not a diagnosis, and a doctor or genetic counsellor is the person to ask about symptoms.
Broader traits
Where this comes from
- The Human Phenotype Ontology, release 2026-09-01: the trait, its names, its definition and the genes linked to it. Find out more at hpo.jax.org.
- Data release 2026.10.16-c6eea6bf.
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