| OA | obstructive apnea; occipital artery; occipito-anterior; occiput anterior; octanoic acid; ocular albi... |
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| occ | occasional; occiput, occipital; occlusion; occlusive; occupation; occurrence |
| occip | occiput, occipital |
| OCS | occipital condyle syndrome; Ondine's curse syndrome; open canalicular system; oral contraceptive ste... |
| OD | Doctor of Optometry; obtained absorbance; occipital dysplasia; occupational dermatitis; occupational... |
| parieto-occipital artery | <anatomy, artery> The largest cortical branch of the pericallosal artery supplying the medial and superolateral surface of the parietal lobe posterior to the paracentral lobule; rarely does it extend to supply part of the occipital lobe. Synonym: arteria parieto-occipitalis, superior internal parietal artery. (05 Mar 2000) |
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| parieto-occipital fissure | A very deep, almost vertically oriented fissure on the medial surface of the cerebral cortex, marking the border between the parietal lobe and the cuneus of the occipital lobe; its lower part curves forward and fuses with the anterior extent of the calcarine fissure (sulcus calcarinus); the great depth of this combined fissure causes a bulge in the medial wall of the occipital horn of the lateral ventricle, the calcar avis. Synonym: sulcus parieto-occipitalis, fissura parietooccipitalis, parieto-occipital fissure. (05 Mar 2000) |
| mastoid border of occipital bone | The margin of the occipital squama that articulates with the temporal bone. Synonym: margo mastoideus squamae occipitalis, mastoid margin of occipital bone. (05 Mar 2000) |
| mastoid branch of occipital artery | <anatomy, artery> Mastoid branch of occipital artery, passing through the mastoid foramen; distribution, mastoid air cells; anastomosis, middle meningeal artery. Synonym: arteriae occipitalis, ramus mastoideus arteriae occipitalis, mastoid branch of occipital artery. (05 Mar 2000) |
| mastoid margin of occipital bone | The margin of the occipital squama that articulates with the temporal bone. Synonym: margo mastoideus squamae occipitalis, mastoid margin of occipital bone. (05 Mar 2000) |
| masto-occipital | Relating to the mastoid portion of the temporal bone and to the occipital bone, denoting the suture uniting them. Synonym: mastoccipital. (05 Mar 2000) |
| maximum occipital point | The point on the squama of the occipital bone farthest from the glabella. (05 Mar 2000) |
| medial occipital artery | <anatomy, artery> One of the terminal branches of the posterior cerebral artery; it is distributed, by several named branches, to the posterior corpus callosum and the medial and superolateral portions of the occipital lobe including the visual cortex. Synonym: arteria occipitalis medialis. (05 Mar 2000) |
| cervico-occipital | Relating to the neck and the occiput. (05 Mar 2000) |
| meningeal branch of occipital artery | <anatomy, artery> One of the variable branches of the occipital artery which may pass through the jugular or parietal foramina or condyloid canal to reach the dura mater and bone of the posterior cranial fossa, as well as the intracranial portions of the caudal four cranial neres. Synonym: ramus meningeus arteriae occipitalis. (05 Mar 2000) |
| 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) |
| 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) |