| viscance | A measure of the energy dissipation due to a flow in a viscous system. In medicine and physiology, usually a measure of the energy dissipation in the flow of liquids, sols, or gels within cells and tissues, or of fluids (e.g., blood, respiratory gases) in tubes. The viscance is the pressure gradient from one end to the other of the flow path when unit flow occurs. The relationship between viscosity and viscance is of the same nature as that between specific resistance, or resistivity, of a conductor material and the resistance of a particular conductor made from that material. (05 Mar 2000) |
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| viscera | Any of the large interior organs in any one of the three great cavities of the body, especially in the abdomen. (12 Dec 1998) |
| viscerad | In a direction toward the viscera. Origin: viscera + L. Ad, to (05 Mar 2000) |
| visceral | <anatomy> From viscus, pertaining to a viscus. Origin: L. Visceralis (13 Oct 1997) |
| visceral afferents | The sensory fibres innervating the viscera. (12 Dec 1998) |
| visceral anaesthesia | Loss of sensation in areas of the visceral peritoneum innervated by the splanchnic nerves. Synonym: visceral anaesthesia. (05 Mar 2000) |
| visceral arches | Typically, 6 arch's in vertebrates; in the lower vertebrates, they bear gills; in the higher vertebrates, they appear transiently and give rise to specialised structures in the head and neck. Synonym: pharyngeal arches, visceral arches. (05 Mar 2000) |
| visceral brain | Collective term denoting a heterogeneous array of brain structures at or near the edge (limbus) of the medial wall of the cerebral hemisphere, in particular the hippocampus, amygdala, and fornicate gyrus; the term is often used so as to include also the interconnections of these structures, as well as their connections with the septal area, the hypothalamus, and a medial zone of mesencephalic tegmentum. By way of the latter connections, the limbic system exerts an important influence upon the endocrine and autonomic motor system's; its functions also appear to affect motivational and mood states. Synonym: visceral brain. (05 Mar 2000) |
| visceral cavity | The celom or one of the body cavity's derived from it. Synonym: visceral cavity. (05 Mar 2000) |
| visceral cleft | Any cleft between two branchial (visceral) arches in the embryo. (05 Mar 2000) |
| visceral crises | Attacks of severe, spreading epigastric pain that occur in patients with tabetic neurosyphilis. (05 Mar 2000) |
| visceral disease virus | <virology> Probably the most widespread of the Herpetoviridae group. Infected cells enlarge and have a characteristic inclusion body (composed of virus particles) in the nucleus. Causes disease only in utero (leading to abortion or stillbirth or to various congenital defects), although can be opportunistic in the immunocompromised host. Patients who have been exposed to the virus will remain cytomegalovirus IgG positive. Acronym: CMV (30 Sep 1997) |
| visceral disorder | Nomenclature used in reference to psychosomatic disorder. (05 Mar 2000) |
| visceral epilepsy | Epilepsy, usually psychomotor, in which the attacks are initiated by visceral symptoms or sensations; most cases have their focus in the temporal lobe. (05 Mar 2000) |
| visceral inversion | A transposition of the viscera, e.g., the liver developing on the left side or the heart on the right. Synonym: visceral inversion. (05 Mar 2000) |