| OHS | obesity hypoventilation syndrome; occipital Horn syndrome; occupational health service; ocular histo... |
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| OTS | occipital temporal sulcus; orotracheal suction |
| PGO | ponto-geniculo-occipital [spike] |
| PO | by mouth, orally [Lat. per os]; parieto-occipital; parietal operculum; period of onset; perioperativ... |
| SO | salpingo-oophorectomy; Schlatter-Osgood [test]; second opinion; sex offender; spheno-occipital [sync... |
| childhood epilepsy with occipital paroxysms | A benign epilepsy syndrome characterised by frequent occipital spikes often activated by eye closure. It has a seizure semiology that includes visual manifestations; not always remitting later in life. (05 Mar 2000) |
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| greater occipital nerve | <anatomy, nerve> Medial branch of the dorsal primary ramus of the second cervical nerve; sends branches to the semispinalis capitis and multifidus cervicis, but is mainly cutaneous, supplying the back part of the scalp. Synonym: nervus occipitalis major. (05 Mar 2000) |
| petro-occipital | Denoting the cranial suture between the occipital bone and the petrous portion of the temporal. Synonym: petroccipital. (05 Mar 2000) |
| petro-occipital fissure | A fissure between the petrous part of the temporal bone and the basilar part of the occipital bone that extends anteromedially from the jugular foramen; includes the jugular foramem (at its posterior end). Synonym: fissura petro-occipitalis, Ecker's fissure. (05 Mar 2000) |
| petro-occipital joint | Fibrocartilage filling the petro-occipital fissure. Synonym: synchondrosis petro-occipitalis. (05 Mar 2000) |
| posterior atlanto-occipital membrane | The fibrous membrane that attaches between the posterior arch of the atlas and the posterior margin of the foramen magnum. Synonym: membrana atlanto-occipitalis posterior. (05 Mar 2000) |
| spheno-occipital | Relating to the sphenoid bone and the basilar process of the occipital bone. Synonym: spheno-occipital, sphenoccipital. (05 Mar 2000) |
| spheno-occipital joint | Cartilaginous union between the body of the sphenoid and the basilar portion of the occipital; it fuses by the twentieth year; incorrectly called spheno-occipital suture. Synonym: synchondrosis spheno-occipitalis, spheno-occipital joint, spheno-occipital suture. (05 Mar 2000) |
| spheno-occipital suture | Cartilaginous union between the body of the sphenoid and the basilar portion of the occipital; it fuses by the twentieth year; incorrectly called spheno-occipital suture. Synonym: synchondrosis spheno-occipitalis, spheno-occipital joint, spheno-occipital suture. (05 Mar 2000) |
| spheno-occipital synchondrosis | Cartilaginous union between the body of the sphenoid and the basilar portion of the occipital; it fuses by the twentieth year; incorrectly called spheno-occipital suture. Synonym: synchondrosis spheno-occipitalis, spheno-occipital joint, spheno-occipital suture. (05 Mar 2000) |
| squamo-occipital | Relating to the squamous portion of the occipital bone, developing partly in membrane and partly in cartilage. (05 Mar 2000) |
| squamous part of occipital bone | The tabular or squamous portion of occipital bone. Synonym: squama occipitalis, occipital squama, frontal squama. (05 Mar 2000) |
| naso-occipital arc | The arc in the midline from the root of the nose to the inferior limit of the external occipital protuberance. (05 Mar 2000) |
| superior occipital gyrus | A gyrus lying above the lateral occipital sulcus on the lateral surface of the occipital lobe. (05 Mar 2000) |
| superior occipital sulcus | One of several small and variable sulci bordering the superior occipital gyri on the upper aspect of the occipital lobe of the cerebrum. Synonym: sulcus occipitalis superior. (05 Mar 2000) |