PMID- 21125803 OWN - NLM STAT- MEDLINE DCOM- 20101223 LR - 20161026 IS - 0006-9248 (Print) IS - 0006-9248 (Linking) VI - 111 IP - 10 DP - 2010 TI - Atlanto-occipital fusion: an osteological study with clinical implications. PG - 562-5 AB - BACKGROUND: Atlanto-occipital fusion may be symptomatic or asymptomatic in nature. The anomaly may be incidentally detected at autopsies or during routine cadaveric dissections. The fusion of the atlas with occipital bone may result in the compression of vertebral artery and first cervical nerve. METHODS: A total of 55 dried occipital bones in the Department of Anatomy, Universiti Kebangsaan Malaysia (UKM) and Department of Anatomy, Universiti Malaya (UM) were included in the study. The presence of atlantooccipital fusion was closely observed and morphometric measurements were taken. RESULTS: Out of 55 dried occipital bones studied, we observed atlanto-occiptalization in two bones (3.63 %). A total of 53 occipital bones (96.37 %) did not exhibit any anomalous fusions. Out of the two anomalous atlanto-occiptal fusions, one was complete while the other had unilateral right-sided fusion of the atlas with the occipital bone. CONCLUSION: Atlanto-occipitalization may result in the compression of vertebral artery thereby influencing the blood flow to the brain. Atlanto-occipitalization may also result in compression of the first cervical nerve. The action of the postural muscles on the extensor surface may be affected as a result of this anomaly. The present article discusses the clinical implications of atlanto-occipitalization, which may be beneficial for neurosurgeons, neurologists and radiologists in day-to-day clinical practice (Fig. 3, Ref. 17). FAU - Kassim, N M AU - Kassim NM AD - Department of Anatomy, Universiti Malaya, Kuala Lumpur, Malaysia. FAU - Latiff, A A AU - Latiff AA FAU - Das, S AU - Das S FAU - Ghafar, N A AU - Ghafar NA FAU - Suhaimi, F H AU - Suhaimi FH FAU - Othman, F AU - Othman F FAU - Hussan, F AU - Hussan F FAU - Sulaiman, I M AU - Sulaiman IM LA - eng PT - Journal Article PL - Slovakia TA - Bratisl Lek Listy JT - Bratislavske lekarske listy JID - 0065324 SB - IM MH - Atlanto-Occipital Joint/*abnormalities MH - Humans MH - Occipital Bone/pathology MH - Synostosis/pathology EDAT- 2010/12/04 06:00 MHDA- 2010/12/25 06:00 CRDT- 2010/12/04 06:00 PHST- 2010/12/04 06:00 [entrez] PHST- 2010/12/04 06:00 [pubmed] PHST- 2010/12/25 06:00 [medline] PST - ppublish SO - Bratisl Lek Listy. 2010;111(10):562-5.