| AGN | acute glomerulonephritis; agnosia |
|---|---|
| agn | agnosia |
| CDE | Colour Doppler Energy |
|---|---|
| CCDS | Colour coded duplex sonography |
| colour agnosia | The inability to name or identify specific colours by sight; caused by lesions of the dominant occipital and temporal lobes. (05 Mar 2000) |
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| agnosia | <neurology> Loss of ability to recognise objects, people, sounds, shapes or smells. Usually classified according to the sense or senses affected (hearing, sight, smell, taste, touch). Symptom common to tumours of the parietal lobe of the cerebral hemispheres. (16 Dec 1997) |
|---|---|
| auditory agnosia | The inability to recognise sounds, words, or music; caused by a lesion of the auditory cortex of the temporal lobe. (05 Mar 2000) |
| visual agnosia | The inability to recognise objects by sight; usually caused by bilateral parieto-occipital lesions. Synonym: optic agnosia. (05 Mar 2000) |
| visual-spatial agnosia | The inability to localise objects or to appreciate distance, motion, and spatial relationships; caused by lesion in the occipital lobe. Compare: simultanagnosia. (05 Mar 2000) |
| position agnosia | The failure to recognise the posture of an extremity. (05 Mar 2000) |
| optic agnosia | The inability to recognise objects by sight; usually caused by bilateral parieto-occipital lesions. Synonym: optic agnosia. (05 Mar 2000) |
| tactile agnosia | The inability to recognise objects by touch, in the presence of intact cutaneous and proprioceptive hand sensation; caused by lesion in the contralateral parietal lobe. Synonym: astereognosis, stereoagnosis, stereoanesthesia. (05 Mar 2000) |
| finger agnosia | The inability to name or recognise individual fingers, of one's own or of other persons; most often caused by lesion of or near the angular gyrus of the dominant hemisphere. (05 Mar 2000) |
| localization agnosia | The inability to recognise the area where the skin is touched. (05 Mar 2000) |
| blue white colour selection | <molecular biology, procedure> Method for identifying bacterial clones containing plasmids with inserts. Many modern vectors have their polycloning site within a part of the LacZ gene encoding _ galactosidase, which provides _ complementation in an appropriate mutant E. Coli strain. This means that a re ligated (empty) vector will produce blue colonies when grown on plates containing IPTG and X gal, but colonies with a substantial insert in their plasmid's polycloning site are unable to produce functional _ galactosidase and so produce white colonies. (16 Dec 1997) |
| Reuss' colour tables | An obsolete charts in which coloured letters are printed on coloured backgrounds in such combination that some of them are invisible to a person with deficient colour vision. Synonym: Stilling colour tables. (05 Mar 2000) |
| colour | 1. That aspect of the appearance of objects and light sources that may be specified as to hue, lightness (brightness), and saturation. 2. That portion of the visible (370-760 nm) electromagnetic spectrum specified as to wavelength, luminosity, and purity. Origin: L. (05 Mar 2000) |
| colour aberration | When using white light through a lens system, it is inevitable that different wave lengths (colours) are brought to a focus at slightly different points. As a consequence, there are chromatic aberations in the image, good microscope objectives are therefore corrected for this at two wave lengths (achromats) or at three wave lengths (apochromats), as well as for spherical aberration. (18 Nov 1997) |
| colour blindness | A sex-linked inherited condition where there is an inability to distinguish colours. Very few women are colour blind, but up to 10% of all men have some degree of colour blindness. The most common for is red-green colour blindness. The second most common is blue-yellow. Inheritance: sex-linked (X chromosome). (27 Sep 1997) |
| colour constancy | Unchanging perception of the colour of an object despite changes in lighting or viewing conditions. (05 Mar 2000) |
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