centrum semiovale

(redirected from Semioval center)
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cen·trum sem·i·o·va·'le

the great mass of white matter comprising the interior of the cerebral hemisphere; the name refers to the general shape of this white core in axial (horizontal) sections of the hemisphere.
Farlex Partner Medical Dictionary © Farlex 2012

centrum semiovale

The mass of white matter at the center of each cerebral hemisphere.
See also: centrum
Medical Dictionary, © 2009 Farlex and Partners

Vicq d'Azyr,

Félix, French anatomist, 1748-1794.
Vicq d'Azyr bundle - a compact, thick bundle of nerve fibers that passes from the mamillary body to terminate in the anterior nucleus of the thalamus. Synonym(s): mamillothalamic fasciculus
Vicq d'Azyr centrum semiovale - the great mass of white matter composing the interior of the cerebral hemisphere. Synonym(s): centrum semiovale
Vicq d'Azyr foramen - a small triangular depression at the lower boundary of the pons that marks the upper limit of the median fissure of the medulla oblongata. Synonym(s): foramen cecum medullae oblongatae


Raymond de, French anatomist, 1641-1715.
valve of Vieussens - a prominent valve in the great cardiac vein where it turns around the obtuse margin to become the coronary sinus.
Vieussens annulus - Synonym(s): Vieussens ring
Vieussens ansa - Synonym(s): Vieussens loop
Vieussens centrum - the great mass of white matter composing the interior of the cerebral hemisphere. Synonym(s): centrum semiovale
Vieussens foramina - a number of fossae in the wall of the right atrium, containing the openings of minute intramural veins. Synonym(s): foramina of the venae minimae
Vieussens ganglia - the largest and highest group of prevertebral sympathetic ganglia, located on the superior part of the abdominal aorta, on either side of the origin of the celiac artery. Synonym(s): celiac ganglia
Vieussens isthmus - Synonym(s): Vieussens ring
Vieussens limbus - Synonym(s): Vieussens ring
Vieussens loop - a nerve cord connecting the middle cervical and stellate sympathetic ganglia, forming a loop around the subclavian artery. Synonym(s): ansa subclavia; Vieussens ansa
Vieussens ring - a muscular ring surrounding the fossa ovalis in the wall of the right atrium of the heart. Synonym(s): limbus fossae ovalis; Vieussens annulus; Vieussens isthmus; Vieussens limbus
Vieussens valve - the thin layer of white matter stretching between the two superior cerebellar peduncles forming the roof of the superior recess of the fourth ventricle. Synonym(s): superior medullary velum
Vieussens veins - the small superficial veins of the heart. Synonym(s): innominate cardiac veins
Vieussens ventricle - a slitlike, fluid-filled space of variable width between the left and right transparent septum. Synonym(s): cavity of septum pellucidum
Medical Eponyms © Farlex 2012
References in periodicals archive ?
Based on the aforementioned results, we found that white matter lesions in DEACMP patients were common in the cortex of parietal and occipital lobe, semioval center, white matter around lateral ventricle, and globus pallidus, and there were different degrees of damage in the white matter and deep gray nuclei.
Ten days after the accident, DWI and T2-weighted MRI of the brain showed a high-signal focus in the left semioval center [Figure 1]d and [Figure 1]e.
Such restricted diffusion formed within 20 h after trauma and developed into confluent cytotoxic cerebral edema in the left semioval center by 10 days after trauma.
In vascular diseases, focal white matter hyperintensities are identified in the deep gray matter structures, corona radiata, and semioval center. Anterior temporal pole involvement is rare in sporadic small vessel disease.
Lacunar infarcts in CADASIL are localized within the semioval center, thalamus, basal ganglia, and pons.
CBV, CBF, and MTT values of NAWM and NADGM areas were calculated by using 20 regions of interest (ROIs) located at the periventricular WM, semioval center, subcortical WM (in the frontal, parietal, temporal, and occipital lobes), thalami, putamen, and caudate nuclei, bilaterally, and also at the splenium and genu of the corpus callosum (CC).
Significant positive associations which appeared to be specific to executive task requirements (set shifting ability) were found for the following perfusion metrics: (a) between CBV in the semioval center and periventricular NAWM (bilaterally) and error rates (Pearson correlations in the set shifting condition ranged between r =.51 and r = .64 (Figure 2(a))--as shown in Table 3, correlation differences between the simple and set shifting conditions ranged between -.76 and -.85 (z > 2.97, P <.003), (b) between CBF in the right (r = .55) and left thalamus (r = .51) and error rates (z > 2.77, P < .005), and (c) between CBF in the left parietal NAWM (r = .59) and right caudate (r = .51) and RT (z > 2.25, P < .024) (Figure 2(b)).
[29], who found, using two-dimensional 1HMRS, that the NAA percentage decreased with age in the temporal lobe and semioval center of the human brain.
An MRI revealed ischemic infarction in the left semioval center and multiple bilateral periventricular white matter (hyperintense) lesions in frontal, temporal and occipital horns, basal ganglia and external capsule.
Transfontanellar Doppler ultrasonography demonstrated two hyperechogenic areas; one extended from the left ventricle to the semioval center, and the other was spread over the left frontobasal area as a result of an anterior cranial fossa invasion through the posterior ethmoid sinus.
MRI revealed anteriorization and enlargement of the anterior-posterior diameter of the frontal sinus, reduction of the maxillary antrum (with hypopneumatization), scalp anomaly compatible with cutis verticis gyrata, probable small cyst of the pineal gland, subtle proptosis of the eyes, prominent cerebrospinal fluid spaces along the optic nerve sheaths, reductions in brain parenchyma incompatible with age (prominent in the posterior parietal regions), and FLAIR hyperintensities of white matter in the occipital horns, atria, posterior horns of the lateral ventricles, part of the corona radiata, and semioval centers, as well as in deep white matter of the superior, middle, and inferior frontal gyrus, the post-central gyrus, and the upper and lower parietal lobes (Figure 3).