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Related to tonus: clonus, muscle tonus


n. pl. to·nus·es
Body or muscular tone; tonicity.

[Latin, tone; see tone.]


(Physiology) physiol the normal tension of a muscle at rest; tone
[C19: from Latin, from Greek tonos tone]


(ˈtoʊ nəs)

a normal state of continuous slight tension in muscle tissue that facilitates its response to stimulation.
[1875–80; < New Latin, Latin < Greek tónos tone]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.tonus - the elastic tension of living muscles, arteries, etc. that facilitate response to stimulitonus - the elastic tension of living muscles, arteries, etc. that facilitate response to stimuli; "the doctor tested my tonicity"
muscular tissue, muscle - animal tissue consisting predominantly of contractile cells
tautness, tenseness, tensity, tension - the physical condition of being stretched or strained; "it places great tension on the leg muscles"; "he could feel the tenseness of her body"
catatonia - extreme tonus; muscular rigidity; a common symptom in catatonic schizophrenia
muscle tone, muscular tonus - normal tonicity of the muscles; "exercise improves muscle tone"
myotonia - abnormally long muscular contractions; slow relaxation of a muscle after a contraction
hypertonia, hypertonus, hypertonicity - (of muscular tissue) the state of being hypertonic
hypotonia, hypotonus, hypotonicity - (of muscular tissue) the state of being hypotonic
References in classic literature ?
Fear and joy may both cause cardiac palpitation, but in one case we find high tonus of the skeletal muscles, in the other case relaxation and the general sense of weakness.
During REM sleep there are random EEG waves, no muscle tonus, rapid eye movements, and a relative increase in genital activity.
When the wild type aged, they lost their muscle tonus, looked flaccid and decrepit.
DENVER -- Sequoia Fitness Products USA has recently launches its first health and fitness tool, the Tonus Body Mass Calculator.
Le retour de ce dernier va certainement donner du tonus a une equipe qui avait perdu beaucoup de sa puissance.
Repondant a l'avalanche de termes employes pour qualifier le secteur de l'immobilier en ces jours fastidieux, marques notamment, par la perte de tonus de nombreux promoteurs immobiliers, Nabil Benabdellah a confie aux anciens etudiants d'EM Lyon que la forte croissance du secteur au cours des dernieres annees, c'est du bon vieux temps maintenant.
Contract notice: Distribution of the departmental magazine tonus
Some studies about heart rate variability were conducted with infants with a gestational age above 30 weeks who were relatively more healthier and it was shown that presence of adequate vagal tonus after birth and appropriate heart rate variability variables indicated better long-term outcomes in terms of cognitive functions and social and motor skills (30-33).
Ozellikle konnektif doku uzerine yapilan yavas basinc stimulasyonu mekanoreseptorler uzerindeki etkiyi degistirir ve gamma motor noron ateslenmesini ve kas tonus duzenlemesini etkileyebilir.
In the set of experiments, after the equilibration period, tonus of the coronary arterial rings became constant.