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Absence of skull bones

DA: 669




Developmental anomaly information

Definition: In humans, the adult skull is normally made up of 22 bones. Except for the mandible, all of the bones of the skull are joined together by sutures, rigid articulations permitting very little movement. Eight bones form the neurocranium (braincase)—including the frontal, parietals, occipital bone, sphenoid, temporals and ethmoid—a protective vault surrounding the brain. Fourteen bones form the splanchnocranium, the bones supporting the face. Encased within the temporal bones are the six ear ossicles of the middle ears, though these are not part of the skull. The hyoid bone, supporting the tongue, is usually not considered as part of the skull either, as it does not articulate with any other bones. The skull is a protector of the brain. Agenesis of the cranial bones, a rare condition which defined as the absence of neurocranium (braincase).


Synonyms:

  • Agenesis cranial bones


Developmental anomaly parent: (empty)

Topology: Human body > Head and neck > Head > Cranium

System: Human body > musculoskeletal system. > Bones

Developmental anomaly category: Agenesis

Case records MDB454
Links
Observed in MDB cases
Observed in combinaisons (MDB)
Observed in malformative diseases (MDB)
Associated genes in profile
Associated genes in malformative diseases
Associated chromosomal diseases
Associated signaling pathways
Associated developmental anomalies

Here is the list of developmental anomalies associated with this developmental anomaly, based on the cases' information :



Last modified: 2009-01-07 15:22:24 by farideh

Created: 2008-09-04 22:06:16 by farideh



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