fibrillar baskets |
<biology> The scleral end of neuroglia fibres of Muller that as fine, tapering, needlelike fibrillae ascend the proximal parts of rods and cones, giving them a fibrillar appearance. (05 Mar 2000) |
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fibrillar centre |
<cell biology> Location of the nucleolar ribosomal chromatin at telophase: as the nucleolus becomes active the ribosomal chromatin and associated ribonucleoprotein transcripts compose the more peripherally located dense fibrillar component. (12 Nov 1997) |
fibrillar region |
<cell biology> Dense staining region of the nucleolus composed of 5nm fibres, RNA transcripts. (12 Nov 1997) |
fibrillary |
1. Relating to a fibril. 2. <biology> Denoting the fine rapid contractions or twitchings of fibres or of small groups of fibres in skeletal or cardiac muscle. Synonym: filar. (05 Mar 2000) |
fibrillary astrocytoma |
<tumour> Astrocytoma derived from fibrillary astrocytes. (05 Mar 2000) |
fibrillary chorea |
Continuous involuntary quivering or rippling of muscles at rest, caused by spontaneous, repetitive firing of groups of motor unit potentials. Synonym: fibrillary chorea, kymatism, Morvan's chorea. Origin: myo-+ G. Kyma, wave (05 Mar 2000) |
fibrillary contractions |
<physiology> Contraction's occurring spontaneously in individual muscle fibres; they are seen commonly a few days after damage to the motor nerves supplying the muscle, and this type of activity is distinguished from fasciculation, which is related to activation of motor units. (05 Mar 2000) |
fibrillary neuroma |
plexiform neurofibroma |
fibrillary waves |
The waves of atrial flutter usually best seen in ECG leads 2, 3, and AVF. (A small f indicates atrial fibrillation). Synonym: fibrillary waves, fibrillatory waves, flutter-fibrillation waves. (05 Mar 2000) |
fibrillate |
1. To make or to become fibrillar. Synonym: fibrillated. 3. To be in a state of fibrillation. (05 Mar 2000) |
fibrillated |
Composed of fibrils. Synonym: fibrillate. (05 Mar 2000) |
fibrillation |
<physiology> A small, local, involuntary contraction of muscle, invisible under the skin, resulting from spontaneous activation of single muscle cells or muscle fibres. (12 Nov 1997) |
fibrillation threshold |
Least intensity of an electrical stimulus that will initiate fibrillation. (05 Mar 2000) |
fibrillation, atrial |
An abnormal irregular heart rhythm whereby electrical signals are generated chaotically throughout the upper chambers (atria) of the heart. Although many persons with atrial fibrillation have no symptoms, the most common symptom is palpitations, an uncomfortable awareness of the rapid and irregular heartbeat. Atrial fibrillation can cause blood clots that travel from the heart to the brain, causing stroke. Treatment of atrial fibrillation involves controlling the risk factors, medications to slow the heart rate and/or convert the heart to normal rhythm, and preventing complications of blood clotting. (12 Dec 1998) |
fibrillation, auricular |
Essentially the same as atrial fibrillation. (12 Dec 1998) |