(n.) An accumulation of liquid within the cavity of the cranium, especially within the ventricles of the brain; dropsy of the brain. It is due usually to tubercular meningitis. When it occurs in infancy, it often enlarges the head enormously.
Example Sentences:
(1) An infant with a Sturge-Weber variant syndrome developed progressive megalencephaly and eventual hydrocephalus, which required shunting.
(2) We document four patients, including two sibs, with asphyxiating thoracic dystrophy and mild congenital hydrocephalus.
(3) We studied 19 patients with normal-pressure hydrocephalus and 19 patients with Binswanger's disease, comparing them with the same number of matched controls.
(4) Also this pathological alteration occurred most frequently (5 out of 11 animals examined 9--10 months after inoculation) in hamsters receiving cell-associated material from carrier cutlures incubated at 33 degrees C. Possible mechanisms for the appearance of hydrocephalus are discussed.
(5) Abnormalities of the middle and inner ear, fusion of the kidneys, hydrocephalus, short-limbed dwarfism and immunodeficiency are described.
(6) Thus, the designation Intermittently Normotensive Hydrocephalus appears to be more exact.
(7) It is concluded that cerebrospinal fluid vasopressin concentration in patients with hydrocephalus is very constant throughout the day, even when plasma vasopressin concentrations show marked episodic increases.
(8) A single and perhaps unique case of a venous malformation over the quadrigeminal plate causing acute obstructive hydrocephalus is reported.
(9) Hydrocephalus and encephalitis in 14-day-old mice was induced by an intracerebral inoculation of a high dose of live Newcastle disease vaccine viruses.
(10) The number of 125I-ANP binding sites in the choroid plexus of rats with kaolin-induced hydrocephalus was significantly higher as compared to findings in the control rats, whereas no differences in the binding affinity were observed 3 days and 3 weeks after the intracisternal injection of kaolin.
(11) Computed tomography was used to study the prevalence rates of various types of intracranial pathology, hydrocephalus (HDC) and cortical atrophy (CA) in patients with late dementia (LD) and to comparatively assess the informative value of tomographic methods of cerebral morphometry.
(12) 24 children underwent CSF shunting, while 57 with communicating hydrocephalus were randomly assigned to three treatment groups: antituberculous drugs only; or additional intrathecal hyaluronidase or oral acetazolamide and furosemide in addition to antituberculous treatment.
(13) The 36 infants in whom external hydrocephalus was idiopathic constitute the study population.
(14) The neurological deficits presented in this case were due to pontine infarction, which was suspected to be produced by thrombosis from the aneurysm, and a hydrocephalus might have been caused by a "water-hammering" effect of the elongated basilar artery.
(15) A series of 55 cases is described in which hydrocephalus associated with non-neoplastic narrowing of the Sylvian aqueduct produced symptoms for the first time in adult life.
(16) Children with shunted, uncomplicated, communicating hydrocephalus were tested to determine (1) the persistence of neuropsychological impairment and (2) the relationship between neuropsychological functioning, ocular motility, and acuity abnormalities.
(17) A case of hydrocephalus is described which developed as a late complication of sarcoidosis.
(18) The belief that hydrocephalus could not be caused by venous obstruction is the result of erroneous or inadequate concepts of venous anatomy.
(19) The average thickness of the corpus callosum at the level of the foramen of Monro was 6 mm in normal subjects and was reduced below 6 mm in 16 of the hydrocephalus patients.
(20) Hydrocephalus and valvular impaction of the cerebellum in the foramen magnum were demonstrated.
Neural
Definition:
(a.) relating to the nerves or nervous system; taining to, situated in the region of, or on the side with, the neural, or cerebro-spinal, axis; -- opposed to hemal. As applied to vertebrates, neural is the same as dorsal; as applied to invertebrates it is usually the same as ventral. Cf. Hemal.
Example Sentences:
(1) By presenting the case history of a man who successively developed facial and trigeminal neural dysfunction after Mohs chemosurgery of a PCSCC, this paper documents histologically the occurrence of such neural invasion, and illustrates the utility of gadolinium-enhanced magnetic resonance scanning in patient management.
(2) Some common eye movement deficits, and concepts such as 'the neural integrator' and the 'velocity storage mechanism', for which anatomical substrates are still sought, are introduced.
(3) 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.
(4) This attack can take place during organogenesis, during early differentiation of neural anlagen after neural tube closure or during biochemical differentiation of the brain.
(5) This effect of adrenalectomy on MNE excitability was further demonstrated by recording directly the neostigmine-induced repetitive neural discharges responsible for the muscle fasciculations.
(6) 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.
(7) This study examines the morphology of sporadic congenital microphthalmia in 1-day-old chicks, with particular emphasis on the neural retina.
(8) Hence, the absence of NGF receptors on premigratory neural crest and early migratory neural crest cultures was not due to enzymatic alterations of the receptor.
(9) By 3 d in the chick embryo, the first neurons detected by antibodies to Ng-CAM are located in the ventral neural tube; these precursors of motor neurons emit well-stained fibers to the periphery.
(10) In this sense, there is evidence that in genetically susceptible individuals, environmental stresses can influence the long-term level of arterial pressure via the central and peripheral neural autonomic pathways.
(11) Predominantly observed defects included neural crest cells in ectopic locations, both within and external to the neural tube, and mildly deformed neural tubes containing some dissociating cells.
(12) Our results suggest that cAMP may be an important regulator of phenotypic expression in at least some neural crest cell lineages.
(13) The results indicate that the different EEG frequency bands during a given EEG epoch are generated by neural populations in different brain locations.
(14) As a consequence, a neural network, considered as a kind of parallel random automata, delivers an output random field in response to the excitation provided by a random field that represents the activity of some input fibers.
(15) Neural crest cells give rise to various essential tissues in vertebrates.
(16) In the present study, we have compared the phosphorylation state of the fibronectin receptor in motile neural crest and somitic cells, in stationary somitic cells, and in Rous-sarcoma virus transformed-chick embryo fibroblasts, using immunoprecipitation following metabolic labeling.
(17) Neural plate damage, expressed during a critical period of forebrain development, was evaluated 48 h post-insonation.
(18) A theory for the neural control of middle ear aeration is proposed.
(19) Methods of analysis for some deterministic and stochastic variants of the integrate-to-threshold neural coding scheme are presented.
(20) Previous work in our laboratory has shown that neural trauma results in a disparity between oxidative and glycolytic rates.