gyrospasm

(ji’ro-spazm) [Gr. γῦρος circle + spasm]. Rotatory spasm of the head. gyrous (ji‘rus). Gyrose. gyrus (ji’rus), pl. gyri [L.; Gr. yipos]. 1. A convolution of the brain. 2. A structure which winds round the brain-stem and central parts of the cerebral hemisphere. lar g., a cerebral convolution continuous anteriorly with the supra marginal gyrus. ammectent g., any one of the four gyri which connect the occipital and parietotemporal lobes. Broca’s g., the inferior frontal gyrus. g. callo’sus, the callosal convolution. g. centra’lis, central convolution. g. cin’gul i, the callosal convolution. dentate @-, an imperfect convolution within the dentate fi ure.. descen’dens, Ecker’s g@-, the aftermost of the occipital convolutions of the cerebrum. g. fornica’tus, a gyrus which makes an arch above the corpus callosum. frontal g., ascending, a part of the frontal lobe, bounded in front by the pre central fi ure, and dorsally by the fi ure of Rolando. frontal g., inferior, the lower and outer portion of the frontal lobe of the cerebrum. frontal g., middle, a convolution between the superfrontal and sub frontal fi ures. frontal f£., superior, a gyrus of the frontal lobe above the superfrontal fi ure. fusiform g., sub collateral g., a gyrus connecting the temporal and occipital lobes, and situated under the collateral and over the sub temporal fi ure. g. genic’uli, a vestigial gyrus at the anterior end of the corpus callosum. hippocampal g., a convolution between the hippocampal and collateral fi ures. carine g., the lingual lobule on the Twisted See gyrus. under surface of the temporal lobe. g. lim’bicus. Same as indusium griseum. lingual g., the median occipitotemporal convolution of the brain. marginal g., a convolution of the frontal lobe bordering on the callosomarginal fi ure. occipital g., any of the three (superior, middle, and inferior) gyni of the occipital lobe. occipitotemporal g. Same as fusiform g. orbital Ε., the orbital convolution. para central g., one on the mesial surface of a cerebral hemisphere, having the para central fi ure in front and the pre cuneus_ behind. parietal g., either one of the gyri (ascending and inferior) of the parietal lobe. parietal g., ascending, a gyrus having the fi ure of Rolando in front, the intraparietal. behind, and the fi ure of Sylvius below. paroccipital g., the first, or 418 HAGIOTHERAPY superior occipital, gyrus of the cerebrum. quadrate g., an upward extension of the gyrus fornicatus on the median surface of the parietal lobe.. rec’tus, a cerebral convolution on the orbital aspect of the frontal, between the olfactory fi ure and the mesial margin. Retsius’ g., sagittal g., a large convolution of the brain running parallel with the sagittal suture of the skull. g. subcallo’sus, the subcallosal convolution. g. supracallo’sus, the supracallosal convolution. supra marginal g., that part of the inferior parietal convolution which curves around the upper end of the sylvian fi ure. temporal g., any gyrus of the temporal lobe. g. transit i’vus. Same as annectentg. uncinate g., the forward continuation of the hippocampal gyrus: its anterior end is hook-shaped. ch010.xhtml **H** H H . The symbol for hydrogen; also an abbreviation for haustus (a draft) and hyper metro pia.