tonus

SYN: tonicity (1). [L., fr. G. tonos]
- baseline t. intrauterine pressure between contractions during labor.
- myogenic t. contraction of a muscle caused by intrinsic properties of the muscle or by its intrinsic innervation.
- neurogenic t. contraction of a muscle caused by the influence of its extrinsic nerve supply.

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to·nus 'tō-nəs n
1) TONE (2a)
2) a state of partial contraction that is characteristic of normal muscle, is maintained at least in part by a continuous bombardment of motor impulses originating reflexly, and serves to maintain body posture called also muscle tone compare CLONUS

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n.
the normal state of partial contraction of a resting muscle, maintained by reflex activity.

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to·nus (toґnəs) [L., from Gr. tonos] the slight, continuous contraction of muscle, which in skeletal muscles aid in the maintenance of posture and in the return of blood to the heart. Called also tone. See also hypertonia and hypotonia.

Medical dictionary. 2011.

Look at other dictionaries:

  • tonus — tonus …   Dictionnaire des rimes

  • tonus — [ tɔnys ] n. m. • 1865; mot lat., du gr. tonos « tension » 1 ♦ Physiol. Tonus musculaire : état de légère tension des muscles au repos, résultant d une stimulation continue réflexe de leurs nerfs moteurs. ⇒ tonicité. Tonus nerveux : excitabilité… …   Encyclopédie Universelle

  • tonus — TÓNUS, tonusuri, s.n. 1. Stare permanentă de uşoară tensiune a muşchilor unui organism sănătos (aflat în repaus). 2. Stare permanentă de excitaţie (în condiţii de repaus) a centrilor nervoşi. ♦ fig. Energie, vigoare. – Din fr. tonus. Trimis de… …   Dicționar Român

  • Tonus — (latinisierte Form des altgriechischen τόνος tonos „Spannung“ zum Verb τείνειν teinein „spannen, an , ausspannen“) ist der „Spannungszustand der Muskulatur“, der durch viskoelastische Eigenschaften des Gewebes und durch Reize des Nervensystems… …   Deutsch Wikipedia

  • tonus — tónus m DEFINICIJA 1. napetost, ob. opće raspoloženje ili ugođaj u nekom društvu, javnosti ili zatvorenom krugu [visoki/niski tonus] 2. fiziol. normalni stupanj pobuđenosti živoga tkiva [mišićni tonus] 3. glazb. a. naziv za ljestvicu u sustavu… …   Hrvatski jezični portal

  • Tonus — To nus, n. [L. a sound, tone. See {Tone}.] (Physiol.) Tonicity, or tone; as, muscular tonus. [1913 Webster] …   The Collaborative International Dictionary of English

  • Tonus — is the Latin equivalent of the English word tone . It is especially used to refer to:* Muscle tone, the continuous and passive partial contraction of the muscles * Arterial tone, the continuous and passive partial contraction of the arterioles *… …   Wikipedia

  • Tonus — (lat.), Ton …   Pierer's Universal-Lexikon

  • Tōnus — (lat., »Spannung«), eine während des Lebens bestehende schwache, unwillkürliche, aber vom Nervensystem abhängige Kontraktion der Muskulatur, die für die Präzision der auszuführenden Bewegungen sowie auch für die Erhaltung und Regulierung der… …   Meyers Großes Konversations-Lexikon

  • Tonus — (grch.), die Spannung der tierischen Gewebe, insbes. eine während des Lebens bestehende, vom Rückenmark angeregte, unwillkürliche, schwache Zusammenziehung der Muskeln. (S. Atonie.) …   Kleines Konversations-Lexikon

  • tónus — m 1. {{001f}}napetost, ob. općeg raspoloženja ili stanje ugođaja u nekom društvu, javnosti ili zatvorenom krugu [visoki/niski ∼] 2. {{001f}}fiziol. normalni stupanj pobuđenosti živoga tkiva [mišićni ∼] 3. {{001f}}glazb. a. {{001f}}naziv za… …   Veliki rječnik hrvatskoga jezika

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