| flow void | In magnetic resonance imaging, the absence of signal from blood whose activated protons leave a region before their magnetization is measured. See: signal void. (05 Mar 2000) |
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| blood-cerebrospinal fluid barrier | A barrier located at the tight junctions which surround and connect the cuboidal epithelial cells on the surface of the choroid plexus; capillaries and connective tissue stroma of the choroid do not represent a barrier to protein tracers or dyes. (05 Mar 2000) |
| cerebrospinal fluid | <neurology> A clear, colourless fluid that contains small quantities of glucose and protein. Cerebrospinal fluid fills the ventricles of the brain and the central canal of the spinal cord. Analysis of the cerebrospinal fluid can be accomplished using lumbar puncture. The presence of white blood cells or bacteria within the cerebrospinal fluid can indicate a bacterial infection (meningitis). Acronym: CSF (12 Jan 1998) |
| cerebrospinal fluid pressure | Manometric pressure of the cerebrospinal fluid as measured by lumbar, cerebroventricular, or cisternal puncture. Within the cranial cavity it is called intracranial pressure. (12 Dec 1998) |
| cerebrospinal fluid proteins | Proteins in the cerebrospinal fluid, normally albumin and globulin present in the ratio of 8 to 1. Increases in protein levels are of diagnostic value in neurological diseases. (brain and bannister's clinical neurology, 7th ed, p221) (12 Dec 1998) |
| cerebrospinal fluid rhinorrhoea | A discharge of cerebrospinal fluid from the nose. (05 Mar 2000) |
| cerebrospinal fluid shunts | Tubes inserted to create communication between a cerebral ventricle and the internal jugular vein. Their emplacement permits draining of cerebrospinal fluid for relief of hydrocephalus or other condition leading to fluid accumulation in the ventricles. (12 Dec 1998) |
| void | 1. Containing nothing; empty; vacant; not occupied; not filled. "The earth was without form, and void." (Gen. I. 2) "I 'll get me to a place more void." (Shak) "I 'll chain him in my study, that, at void hours, I may run over the story of his country." (Massinger) 2. Having no incumbent; unoccupied; said of offices and the like. "Divers great offices that had been long void." (Camden) 3. Being without; destitute; free; wanting; devoid; as, void of learning, or of common use. "A conscience void of offense toward God." (Acts xxiv. 16) "He that is void of wisdom despiseth his neighbor." (Prov. Xi. 12) 4. Not producing any effect; ineffectual; vain. "[My word] shall not return to me void, but it shall accomplish that which I please." (Isa. Lv. 11) "I will make void the counsel of Judah." (Jer. Xix. 7) 5. Containing no immaterial quality; destitute of mind or soul. "Idol, void and vain." 6. Of no legal force or effect, incapable of confirmation or ratification; null. Cf. Voidable. <physics> Void space, a vacuum. Synonym: Empty, vacant, devoid, wanting, unfurnished, unsupplied, unoccupied. Origin: OE. Voide, OF. Voit, voide, vuit, vuide, F. Vide, fr. (assumed) LL. Vocitus, fr. L. Vocare, an old form of vacare to be empty, or a kindred word. Cf. Vacant, Avoid. Source: Websters Dictionary (01 Mar 1998) |
| void metal composite | A porous metal structure that enables tissue growth within the openings to establish long-term attachment between prosthesis and tissue. (05 Mar 2000) |
| signal void | In magnetic resonance imaging, a region emitting no radiofrequency signal, either because there are no activated protons in the region (such as flowing blood) or because a different element predominates, particularly calcium. (05 Mar 2000) |
| cerebrospinal | <anatomy> Pertaining to the brain and spinal cord. (18 Nov 1997) |
| cerebrospinal axis | The central nervous system; the brain and spinal cord. Synonym: encephalomyelonic axis, neural axis. (05 Mar 2000) |
| cerebrospinal fever | An acute infectious disease affecting children and young adults, caused by Neisseria meningitidis; characterised by nasopharyngeal catarrh, headache, vomiting, convulsions, stiffness in the neck (nuchal rigidity), photophobia, constipation, cutaneous hyperesthesia, a purpuric or herpetic eruption, and the presence of Kernig's sign. Fulminant form may cause Waterhouse-Friderichsen syndrome. Synonym: cerebrospinal fever, epidemic cerebrospinal meningitis. (05 Mar 2000) |
| cerebrospinal index | The figure obtained by multiplying the pressure of the cerebrospinal fluid, after fluid has been withdrawn by spinal puncture, by the quantity of fluid withdrawn and then dividing by the original pressure. Synonym: cephalorrhachidian index. (05 Mar 2000) |
| cerebrospinal meningitis | <microbiology, neurology> Inflammation of the meninges. When it affects the dura mater, the disease is termed pachymeningitis, when the arachnoid and pia mater are involved, it is called leptomeningitis or meningitis proper. See also: aseptic meningitis. Origin: Gr. Meninx = membrane (21 Jun 1999) |