| hemispherium cerebri | 1. A half sphere; one half of a sphere or globe, when divided by a plane passing through its center. 2. Half of the terrestrial globe, or a projection of the same in a map or picture. 3. The people who inhabit a hemisphere. "He died . . . Mourned by a hemisphere." (J. P. Peters)ten Cerebral hemispheres. <anatomy> See Brain. <physics> Magdeburg hemispheres, two hemispherical cups forming, when placed together, a cavity from which the air can be withdrawn by an air pump; used to illustrate the pressure of the air. So called because invented by Otto von Guericke at Magdeburg. Origin: L. Hemisphaerium, Gr.; half = sphere: cf. F. Hemisphere. See Hemi-, and Sphere. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| pseudotumour cerebri | <radiology> Idiopathic, increased cerebrospinal fluid production, increased intracranial pressure, papilledema, CT: slit-like ventricles, treatment: steroids (12 Dec 1998) |
| hypophysis cerebri | pituitary gland |
| sulci cerebri | The grooves between the cerebral gyri or convolutions. Synonym: sulci cerebri. (05 Mar 2000) |
| sulcus lateralis cerebri | The deepest and most prominent of the cortical fissures, extending from the anterior perforated substance first laterally at the deep incisure between the frontal and temporal lobes, then back and slightly upward over the lateral aspect of the cerebral hemisphere, with the superior temporal gyrus as its lower bank, the insula forming its greatly expanded floor. Two short side branches, the ramus anterior and ramus ascendens, divide the inferior frontal gyrus into an orbital part, triangular part, and opercular part. Synonym: sulcus lateralis cerebri, fissura cerebri lateralis, lateral cerebral fissure, sylvian fissure, fissure of Sylvius. (05 Mar 2000) |
| sulcus lunatus cerebri | A small, inconstant semilunar groove on the cortical convexity near the occipital pole, marking the anterior border of the striate cortex (area 17) and considered homologous with the major sulcus of the same name that is a more constant feature of the cerebral cortex in monkeys and apes. Synonym: sulcus lunatus cerebri, ape fissure, lunate fissure, lunate sulcus, simian fissure. (05 Mar 2000) |
| sulcus medialis cruris cerebri | A groove in the lateral wall of the interpeduncular fossa of the midbrain from which the rootlets of the oculomotor nerve emerge. Synonym: sulcus medialis cruris cerebri, sulcus nervi oculomotorii, sulcus of the oculomotor nerve. (05 Mar 2000) |
| tinnitus cerebri | Subjective sensation of noise in head rather than ears. (05 Mar 2000) |
| epiphysis cerebri | A small conical midline body attached to the posterior part of the third ventricle and lying between the superior colliculi, below the splenium of the corpus callosum. (12 Dec 1998) |
| falx cerebri | <anatomy> The scythe-shaped fold of dura mater in the longitudinal fissure between the two cerebral hemispheres; it is attached anteriorly to the crista galli of the ethmoid bone and caudally to the upper surface of the tentorium. (05 Mar 2000) |
| fibrae arcuatae cerebri | Short association fibres that connect adjacent gyri in the cerebral cortex. Synonym: fibrae arcuatae cerebri. (05 Mar 2000) |
| fissura cerebri lateralis | The deepest and most prominent of the cortical fissures, extending from the anterior perforated substance first laterally at the deep incisure between the frontal and temporal lobes, then back and slightly upward over the lateral aspect of the cerebral hemisphere, with the superior temporal gyrus as its lower bank, the insula forming its greatly expanded floor. Two short side branches, the ramus anterior and ramus ascendens, divide the inferior frontal gyrus into an orbital part, triangular part, and opercular part. Synonym: sulcus lateralis cerebri, fissura cerebri lateralis, lateral cerebral fissure, sylvian fissure, fissure of Sylvius. (05 Mar 2000) |
| fissura longitudinalis cerebri | The deep cleft separating the two hemispheres of the cerebrum. Synonym: fissura longitudinalis cerebri, great longitudinal fissure. (05 Mar 2000) |
| fissura transversa cerebri | The triangular space between the corpus callosum and fornix above and the dorsal surface of the thalamus below, which is bounded laterally by the choroid fissure of the lateral ventricle, lined by pia mater, and opens caudally into the cistern of the great cerebral vein of the subarachnoid space. Synonym: fissura transversa cerebri. (05 Mar 2000) |
| lacuna cerebri | A small circumscribed loss of brain tissue caused by occlusion of one of the small penetrating arteries. Synonym: lacuna cerebri. (05 Mar 2000) |