(n.) The whitish mass of soft matter (the center of the nervous system, and the seat of consciousness and volition) which is inclosed in the cartilaginous or bony cranium of vertebrate animals. It is simply the anterior termination of the spinal cord, and is developed from three embryonic vesicles, whose cavities are connected with the central canal of the cord; the cavities of the vesicles become the central cavities, or ventricles, and the walls thicken unequally and become the three segments, the fore-, mid-, and hind-brain.
(n.) The anterior or cephalic ganglion in insects and other invertebrates.
(n.) The organ or seat of intellect; hence, the understanding.
(n.) The affections; fancy; imagination.
(v. t.) To dash out the brains of; to kill by beating out the brains. Hence, Fig.: To destroy; to put an end to; to defeat.
(v. t.) To conceive; to understand.
Example Sentences:
(1) Here we have asked whether protection from blood-borne antigens afforded by the blood-brain barrier is related to the lack of MHC expression.
(2) The extents of phospholipid hydrolysis were relatively low in brain homogenates, synaptic plasma membranes and heart ventricular muscle.
(3) First results let us assume that clinically silent TIAs also (in analogy to clinically silent brain infarctions) could be detected and located.
(4) Brain and ganglia of embryonic Periplaneta americana were grown for 2 to 3 weeks in a chemically defined medium.
(5) The results indicated that neuropsychological measures may serve to broaden the concept of intelligence and that a brain-related criterion may contribute to a fuller understanding of its nature.
(6) To quantify the size of the lesion in mice, the area of the infarct on the brain surface was assessed planimetrically 48 h after MCA occlusion by transcardial perfusion of carbon black.
(7) However, CT will be insensitive in the detection of the more cephalic proximal lesions, especially those in the brain stem, basal cisterns, and skull base.
(8) 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.
(9) We similarly evaluated the ability of other phospholipids to form stable foam at various concentrations and ethanol volume fractions and found: bovine brain sphingomyelin greater than dipalmitoyl 3-sn-phosphatidylcholine greater than egg sphingomyelin greater than egg lecithin greater than phosphatidylglycerol.
(10) This study examined the [3H]5-HT-releasing properties of 3,4-methylenedioxymethamphetamine (MDMA) and related agents, all of which cause significant release of [3H]5-HT from rat brain synaptosomes.
(11) In the present investigation we monitored the incorporation of [14C] from [U-14C]glucose into various rat brain glycolytic intermediates of conscious and pentobarbital-anesthetized animals.
(12) Cranial MRI revealed delayed myelination in the white matter but no brain malformation.
(13) When compared with lissencephalic species, a great horizontal fibrillary system (which is vertically arranged in gyral regions) was observed in convoluted brains.
(14) In more than 70 per cent of these, brain injury is the decisive lethal factor.
(15) Brain damage may be followed by a number of dynamic events including reactive synaptogenesis, rerouting of axons to unusual locations and altered axon retraction processes.
(16) Based on our results, we propose the following hypotheses for the neurochemical mechanisms of motion sickness: (1) the histaminergic neuron system is involved in the signs and symptoms of motion sickness, including vomiting; (2) the acetylcholinergic neuron system is involved in the processes of habituation to motion sickness, including neural store mechanisms; and (3) the catecholaminergic neuron system in the brain stem is not related to the development of motion sickness.
(17) The regional distribution of beta-adrenoceptor subtypes was found to be similar to that seen in the rat brain.
(18) We assessed changes in brain water content, as reflected by changes in tissue density, during the early recirculation period following severe forebrain ischemia.
(19) If tracer is introduced into the carotid artery after osmotic treatment, brain uptake is increased by a net factor of 50 (a factor of 70 due to elevation of PA, multiplied by 7 due to infusion by the carotid route) as compared to uptake by normal, untreated brain with infusion into a peripheral vein.
(20) This study examined both the effect of variations in optical fiber tip and in light wavelength on laser-induced hyperthermia in rat brain.
Falx
Definition:
(n.) A curved fold or process of the dura mater or the peritoneum; esp., one of the partitionlike folds of the dura mater which extend into the great fissures of the brain.
Example Sentences:
(1) The right occipital lobe is retracted laterally from the falx cerebri.
(2) A complex form of pluridistrectual dysmorphic disorder (hypertelorism, prognathism, frontal bossing, multiple cysts of the mandible, calcification in falx cerebri, etc) was also present, suggesting a limited form of Gorlin's syndrome (nevoid basal cell carcinoma syndrome).
(3) These findings led to an initial diagnosis of falx meningioma.
(4) Frequently, the wall of the posterior vein adheres to the falx cerebri, presenting ascendant trajet to the inferior wall of the sinus.
(5) Evaluation of falx images on CT scan was done in 964 normal or abnormal cases in relation to different CT slice level, age, sex, pineal body and habenula and choroid plexus.
(6) The autopsy confirmed the diagnosis of melorheostosis and revealed a meningioma of falx cerebri in close proximity to predominantly intraventricular calcified tissue.
(7) Calcification of the falx cerebri of the dura mater, as well as other areas of the brain, have been reported.
(8) It is suggested that other characteristics of the syndrome, such as jaw cysts, palmar and plantar pitting and calcification of the falx cerebri will develop as the patient grows older.
(9) The article analyses the late results of surgical treatment of 123 patients with parasagittal meningiomas of various localization along the superior sagittal sinus (SSS) and falx cerebri (FC).
(10) The tumour originated from the falx in the left fronto-parietal region near the paracentral lobule.
(11) The incidence of calcification in the choroid plexus and the falx cerebri was also considerably less than previously reported.
(12) The bright midline echo observed in fetal cranial sonography has been termed by many authors the "falx cerebri."
(13) The falx meningioma recurred locally and repeatedly, despite radiation therapy and chemoimmunotherapy.
(14) Computed tomography scan in a 43-year-old woman revealed a fusiform mass involving the falx.
(15) A case of a recurrent hemangiopericytoma of the falx which responded well to radiotherapy is reported.
(16) A report of an interhemispheric ependymoma with classical angiographic characteristics of falx meningioma illustrates that a neoplasm of intracerebral origin may present in a predomimantly extracerebral location.
(17) After the second operation, repeated recurrence of multiple tumors was seen, which were in the frontal, parietal and occipital convexities, parasagittal regions and falx.
(18) A postmortem specimen of densely "calcified" falx cerebri was examined that revealed cortical bone and a medullary cavity complete with bony trabeculae and marrow.
(19) The configuration of Model III is the same as Model II but more detailed anatomical features of the head interior were added, such as, cerebral spinal fluid (CSF); falx cerebri, dura, and tentorium.
(20) Thin wall was enhanced smoothly and the nodule attached to the falx was enhanced heterogeneously.