(a.) Moving in a circular path or way; whirling; gyratory.
(a.) Pertaining to a gyrus, or convolution.
Example Sentences:
(1) When compared with lissencephalic species, a great horizontal fibrillary system (which is vertically arranged in gyral regions) was observed in convoluted brains.
(2) Besides thalamic inclusion bodies and minor abnormalities in gyral architecture with a disordered cortical cellular arrangement, some new observations have been made.
(3) Common abnormalities in acallosal patients included: mental retardation (MR), 73% [corrected]; seizures, 42%; ocular anomalies, 42%; gyral abnormalities, 32%; hydrocephalus, 23%; other central nervous system (CNS) lesions, 29%; costovertebral defects, 24%.
(4) Significantly more beta A4 was found in the grey matter of the sulci as compared to that of the gyral crests in both the frontal and the temporal lobes (P less than 0.05).
(5) Because the underlying laminar arrangement of neurons and the basic gyral pattern are normal, the cortical damage probably occurred not earlier than the third trimester of gestation.
(6) is a consequence of the increase in volume of the gyral region adjacent to this developing sulcus, whereas there is a smaller increase in volume of the gyral region adjacent to the almost fully formed, at birth, S.S-Syl.
(7) Furthermore, by virtue of its exquisite soft tissue detail, MR can afford additional clarity and information with respect to relative gray-white matter loss, subarachnoid space size, gyral deformity, as well as highlighting asymmetry of the cerebral peduncles, internal capsules and the thalami.
(8) This article presents three cases of early Listeria monocytogenes cerebritis, two of which demonstrated ill-defined superficial areas of low attenuation with curvilinear gyral enhancement and one of which demonstrated a deep, low-attenuation lesion with faint surrounding enhancement.
(9) An enhanced CT revealed gyral enhancements in the pre- and postcentral gyrus of the right hemisphere.
(10) is the principal thalamic relay to the gyral surface of the caudal inferior parietal lobule (area 7a).
(11) Less consistent components are aplasia of mammillary bodies, fusion of thalami, anomalies of cerebral gyral patterns, bifid atlas or bifid occipital squame, elevation of torcular, and cervical hydromyelia.
(12) The identification of this anomaly is difficult because of its symmetry and the minimal abnormality of the gyral pattern of the cortex.
(13) This assigns gyral sights to scalp sites of transcranial stimulation.
(14) It should be noted that Gd-DTPA enhanced MR image might fail to reveal the lesion of glioblastoma in its early stage, while T1 weighted image discloses only the gyral swelling.
(15) The integrated 3D model depicted the location of PET-detected metabolic abnormalities with respect to the gyral anatomy visualized with MR.
(16) Including this patient, agenesis of the corpus callosum appeared in 6 of 15 patients, gyral malformation in 6 of 14, ventricular enlargement in 5 of 15, and cerebellar hypoplasia in 2 of 16.
(17) In 17 cases, the MR examinations showed both subependymal nodules and multiple peripheral gyral lesions consistent with cortical tubers.
(18) CT disclosed bilateral calcification in a parieto-occipital gyral pattern.
(19) However, MR imaging is more sensitive than CT in the detection of gyral tubers and, thus, may be better for screening family members and others in whom tuberous sclerosis is a possibility.
(20) In this study, normal gyral development of the neonatal brain is reviewed and gyral pattern is correlated to gestational parameters.
Gyrus
Definition:
(n.) A convoluted ridge between grooves; a convolution; as, the gyri of the brain; the gyri of brain coral. See Brain.
Example Sentences:
(1) The fine structure of neurofibrillary tangles in the hippocampal gyrus, substantia nigra, pontine nuclei and locus coeruleus of the brain was postmortem studied in a case of progressive supranuclear palsy.
(2) It is also suggested that degenerative changes occur in the dentate gyrus and may be involved in the delayed neural death of CA1 pyramidal cells.
(3) of rats resulted in cell death and terminal degeneration in entorhinal, insular, and posterior cingulate cortices, and in the CA1, CA3 and dentate gyrus sectors of hippocampus.
(4) Cholecystokinin (CCK) as the sulfated (CCK-8S) and unsulfated (CCK-8U) octapeptide sequences, and CR 1409 were administered intraventricularly while the action potential (EAP) in the granular cell layer of the hippocampal dentate gyrus evoked by perforant path stimulation was recorded.
(5) The deficits noted in the granule cells of the dentate gyrus in this study were more severe than those found in our previous studies on the effect of the low protein diet in these same rats on visual cortical pyramidal cells and on the 3 cell types in the nucleus raphe dorsalis and nucleus locus coeruleus.
(6) Following unilateral destruction of the entorhinal cortical region of the adult rat, the denervated granule cells of the dentate gyrus are reinnervated as a result of the proliferation of a pathway from the surviving contralateral entorhinal area.
(7) It is postulated that in case vasopressin affects retrieval processes the site of action is located in the amygdala and the dentate gyrus of the hippocampal complex with dopamine and serotonin as the respective neurotransmitter systems involved.
(8) The densities of muscarinic receptors, as well as the proportions of M1 and M2 subtypes, in the CA1 sector and dentate gyrus were not significantly different between ATD and old non-demented patients.
(9) The subicular area, best expressed in the temporal sector, extends anteriorly over the corpus callosum to the subcallosal gyrus and, throughout its extent from the uncal to the septal junction, is clearly demarcated from limbic neocortex by a transition zone characterized by archicortical cells merging with cells in the deep layer of the bordering neocortex.
(10) Electrical responses to stimulation of different areas of the cingulate gyrus were studied in L2-L3 white rami in anesthetized and immobilized cats.
(11) When the site of injection involved the region of the cingulate gyrus, where presumed axon terminals had been labeled in the first set of experiments, the thalamic region just ventral to the ventral margin of the caudal two-thirds of the VB ipsilateral to the WGA-HRP injection contained neuronal cell bodies labeled retrogradely.
(12) The local cerebral metabolic rate for glucose (LCMRGlc) in the parahippocampal gyrus-hippocampus and the dorsolateral prefrontal cortex were determined.
(13) In the dentate gyrus, [3H]inositol 1,4,5-trisphosphate binding decreased seven days after ischemia.
(14) Changes seen on the computed tomographic scan and the middle latency auditory evoked response over a seven-month period were analyzed and suggest that the peak component of the middle latency response arises from Heschl's gyrus.
(15) mGluR1 alpha, a 142 kd protein, is enriched within the olfactory bulb, stratum oriens of CA1 and polymorph layer of dentate gyrus in hippocampus, globus pallidus, thalamus, substantia nigra, superior colliculus, and cerebellum.
(16) Most of the GABA-negative calretinin-immunoreactive neurons were located in the hilus of the dentate gyrus and in stratum lucidum of the CA3 subfield.
(17) The DT analysis showed that the dipole equivalent of the slow wave is approximately located at the frontal part of the left cingulate gyrus, away from the margins of the infarction and enlarged left lateral ventricle demonstrated by MRI, and in a region with intact oxygen consumption rate.
(18) Methacrylate-embedded sections and short-survival thymidine radiograms of the hippocampal dentate gyrus were examined in perinatal and postnatal rats in order to trace the site of origin and migration of the precursors of granule cells and study the morphogenesis of the granular layer.
(19) The effect of partial resection of the gyrus rectus during the unilateral pterional approach on surgical outcome was evaluated in 194 consecutive patients with ruptured anterior communicating artery aneurysms.
(20) Thus, electrophysiological alterations within the first synaptic relay of the hippocampal trisynaptic circuit, the dentate gyrus, cannot explain the long duration of the kindling effect.