(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.
Stroke
Definition:
(imp.) Struck.
(v. t.) The act of striking; a blow; a hit; a knock; esp., a violent or hostile attack made with the arm or hand, or with an instrument or weapon.
(v. t.) The result of effect of a striking; injury or affliction; soreness.
(v. t.) The striking of the clock to tell the hour.
(v. t.) A gentle, caressing touch or movement upon something; a stroking.
(v. t.) A mark or dash in writing or printing; a line; the touch of a pen or pencil; as, an up stroke; a firm stroke.
(v. t.) Hence, by extension, an addition or amandment to a written composition; a touch; as, to give some finishing strokes to an essay.
(v. t.) A sudden attack of disease; especially, a fatal attack; a severe disaster; any affliction or calamity, especially a sudden one; as, a stroke of apoplexy; the stroke of death.
(v. t.) A throb or beat, as of the heart.
(v. t.) One of a series of beats or movements against a resisting medium, by means of which movement through or upon it is accomplished; as, the stroke of a bird's wing in flying, or an oar in rowing, of a skater, swimmer, etc.
(v. t.) The rate of succession of stroke; as, a quick stroke.
(v. t.) The oar nearest the stern of a boat, by which the other oars are guided; -- called also stroke oar.
(v. t.) The rower who pulls the stroke oar; the strokesman.
(v. t.) A powerful or sudden effort by which something is done, produced, or accomplished; also, something done or accomplished by such an effort; as, a stroke of genius; a stroke of business; a master stroke of policy.
(v. t.) The movement, in either direction, of the piston plunger, piston rod, crosshead, etc., as of a steam engine or a pump, in which these parts have a reciprocating motion; as, the forward stroke of a piston; also, the entire distance passed through, as by a piston, in such a movement; as, the piston is at half stroke.
(v. t.) Power; influence.
(v. t.) Appetite.
(v. t.) To strike.
(v. t.) To rib gently in one direction; especially, to pass the hand gently over by way of expressing kindness or tenderness; to caress; to soothe.
(v. t.) To make smooth by rubbing.
(v. t.) To give a finely fluted surface to.
(v. t.) To row the stroke oar of; as, to stroke a boat.
Example Sentences:
(1) The major treatable risk factors in thromboembolic stroke are hypertension and transient ischemic attacks (TIA).
(2) In the stage 24 chick embryo, a paced increase in heart rate reduces stroke volume, presumably by rate-dependent decrease in passive filling.
(3) We studied the effects of the localisation and size of ischemic brain infarcts and the influence of potential covariates (gender, age, time since infarction, physical handicap, cognitive impairment, aphasia, cortical atrophy and ventricular size) on 'post-stroke depression'.
(4) Serum sialic acid concentration predicts both death from CHD and stroke in men and women independent of age.
(5) Cardiovascular disease event rates will be assessed through continuous community surveillance of fatal and nonfatal myocardial infarction and stroke.
(6) Five late strokes were ipsilateral (1.8%) and six were contralateral (2.1%) to the operated carotid artery.
(7) Diabetic retinopathy (an index of microangiopathy) and absence of peripheral pulses, amputation, or history of myocardial infarction, stroke, or transient ischemic attacks (as evidence of macroangiopathy) caused surprisingly little increase in relative risk for cardiovascular death.
(8) Urinary incontinence present between 7 and 10 days after stroke was the most important adverse prognostic factor both for survival and for recovery of function.
(9) Acetylsalicylic acid has been shown to reduce significantly stroke, death and stroke-related death in men, with no detectable benefit for women.
(10) Atrophy was present in 44% of TIA patients, 68% of PRIND patients and 82% of completed stroke patients.
(11) On the basis of clinical symptoms and CT scan findings, 66 patients were categorized as having sustained a RIND and 187 a stroke.
(12) Recognised risk factors for stroke were found equally in those patients with and without severe events before onset, except that hypertension was rather less common in the patients who had experienced a severe event.
(13) These are risk factors for diabetes, cardiovascular disease and stroke.
(14) Stroke was the cause of 2 and congestive heart failure the cause of 4 deaths.
(15) Combined clinical observations, stroke volume measured by impedance cardiography, and ejection fractions calculated from systolic time intervals, all showed significant improvement in parallel with CoQ10 administration.
(16) He won the Labour candidacy for the Scottish seat of Kilmarnock and Loudon in 1997, within weeks of polling day, after the sitting Labour MP, Willie McKelvey, decided to stand down when he suffered a stroke.
(17) During surgical stimulation cardiac index increased in group A due to an increase in heart rate but remained below control in group B, while stroke volume index was reduced in both groups throughout the whole procedure.
(18) In 2001 Sorensen suffered a stroke, which seriously damaged his eyesight, but he continued to be involved in a number of organisations, including the Council on Foreign Relations and other charitable and public bodies, until a second stroke in October 2010.
(19) Two hundred and forty-one residents were examined for carotid bruits and signs of previous stroke.
(20) One hundred ten atherosclerotic occlusions of the internal carotid artery (ICA) were found in 106 patients in group I. Fifty-one percent of these patients had a history of stroke before arteriography, 24% had transient ischemic attacks (TIAs) or amaurosis fugax (AF), and 12% had nonhemispheric symptoms.