| REM | <radiobiology> The conventional unit of dose equivalent. The dose equivalent in rem is numerically equal to the absorbed dose, D, in rad multiplied by the quality factor Q. 1 rem = 0.01 sievert. (See sievert, rad). Note: for most medical applications involving X-ray or gamma emitters, the numerical values of the absorbed dose in rad, dose equivalent in rem and exposure in R are roughly equivalent numerically. (16 Dec 1997) |
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| REM behaviour disorder | A disorder characterised by lack of the atonia of voluntary muscles that normally occurs in REM sleep. (05 Mar 2000) |
| REM stage sleep | <physiology> A stage of deep sleep that is accompanied by rapid eye movement and muscle paralysis. Vivid dreams can be recalled in over 80% of patients who awake from REM stage sleep. (27 Sep 1997) |
| REM syndrome | <syndrome> A reticular erythematous dermatitis of the upper trunk, more common in women, in which there is perivascular infiltrate of lymphocytes, few plasma cells, and upper dermal deposits of mucin; worsens on exposure to ultraviolet light. Synonym: reticular erythematous mucinosis. (05 Mar 2000) |
| remainder | 1. Anything that remains, or is left, after the separation and removal of a part; residue; remnant. "The last remainders of unhappy Troy." "If these decoctions be repeated till the water comes off clear, the remainder yields no salt." (Arbuthnot) 2. <mathematics> The quantity or sum that is left after subtraction, or after any deduction. 3. An estate in expectancy, generally in land, which becomes an estate in possession upon the determination of a particular prior estate, created at the same time, and by the same instrument; for example, if land be conveyed to A for life, and on his death to B, A's life interest is a particuar estate, and B's interest is a remainder, or estate in remainder. Synonym: Balance, rest, residue, remnant, leavings. Origin: OF. Remaindre, inf. See Remain. Source: Websters Dictionary (01 Mar 1998) |
| Remak's fibres | A fibre having no myelin covering (CNS); a naked axon; in the PNS represented by all axons lying in troughs in a single Schwann cell (Schwann cell unit); a slow conducting fibre. Synonym: gray fibres, nonmedullated fibres, Remak's fibres. (05 Mar 2000) |
| Remak's ganglia | Groups of nerve cells in the wall of the venous sinus where it joins the right atrium of the heart, autonomic ganglia in nerves of the stomach. (05 Mar 2000) |
| Remak's nuclear division | <cell biology> An unusual form of nuclear division, in which the nucleus simply constricts, rather like a cell without chromosome condensation or spindle formation. Partitioning of daughter chromosomes is haphazard. Observed in some Protozoa. (18 Nov 1997) |
| Remak's plexus | A gangliated plexus of unmyelinated nerve fibres, derived chiefly from the superior mesenteric plexus, ramifying in the intestinal submucosa. Synonym: plexus submucosus, Meissner's plexus, Remak's plexus. (05 Mar 2000) |
| Remak's reflex | Plantar flexion of the first three toes and, sometimes, the foot with extension of the knee induced by stroking of the upper anterior surface of the thigh; it occurs when the conducting paths in the cord are interrupted. (05 Mar 2000) |
| Remak's sign | <clinical sign> Dissociation of the sensations of touch and of pain in tabes dorsalis and polyneuritis. (05 Mar 2000) |
| Remak, Ernst | <person> German neurologist, 1848-1911. See: Remak's reflex, Remak's sign. (05 Mar 2000) |
| Remak, Robert | <person> Polish-German anatomist and histologist, 1815-1865. See: Remak's nuclear division, Remak's fibres, Remak's ganglia, Remak's plexus. (05 Mar 2000) |
| remanent | Remaining; residual. "That little hope that is remanent hath its degree according to the infancy or growth of the habit." (Jer. <physics> Taylor) Remanent magnetism, magnetism which remains in a body that has little coercive force after the magnetizing force is withdrawn, as soft iron. Synonym: residual magnetism. Origin: L. Remanens, p. Pr. Of remanere. See Remain, and cf. Remnant. Source: Websters Dictionary (01 Mar 1998) |
| remediable | Curable. Origin: L. Remediabilis, fr. Remedio, to cure (05 Mar 2000) |
| sleep, rem | A stage of sleep characterised by rapid movements of the eye and low voltage fast pattern eeg. It is usually associated with dreaming. (12 Dec 1998) |
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