isometric contraction


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Related to isometric contraction: isometric muscle contraction

contraction

 [kon-trak´shun]
a drawing together; a shortening or shrinkage.
Braxton Hicks c's see braxton hicks contractions.
carpopedal contraction the condition resulting from chronic shortening of the muscles of the upper and lower limbs including the fingers and toes, seen in tetany.
concentric contraction contraction resulting in shortening of a muscle, used to perform positive work or to accelerate a body part. It is metabolically more demanding than an eccentric contraction. Called also shortening contraction.
Dupuytren's contraction Dupuytren's contracture.
eccentric contraction contraction in the presence of a resistive force that results in elongation of a muscle, used to perform negative work or to decelerate a body part. It is less metabolically demanding than a concentric contraction but may cause disruption of associated connective tissue with delayed soreness or frank injury if it occurs in an unaccustomed manner. Called also lengthening contraction.
end-diastolic premature ventricular contraction a ventricular ectopic beat falling at the end of diastole; it may or may not be slightly premature and may or may not be a fusion beat.
haustral c's muscular contractions of the wall of the large intestine during which the haustra can be seen more easily; called also haustrations.
isometric contraction muscle contraction without appreciable shortening or change in distance between its origin and insertion.
isotonic contraction muscle contraction without appreciable change in the force of contraction; the distance between the origin and insertion becomes lessened.
lengthening contraction eccentric contraction.
postural contraction the state of muscular tension and contraction that just suffices to maintain the posture of the body.
segmental c's muscular contractions of the small intestine that serve to mix and transport chyme.
shortening contraction concentric contraction.
contraction stress test observation of the fetal heart rate in response to uterine contractions; see also fetal monitoring.
tetanic contraction (tonic contraction) physiological tetanus.
Volkmann's contraction Volkmann's contracture.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

i·so·met·ric con·trac·tion

force development at constant length. Compare: isotonic contraction.
Farlex Partner Medical Dictionary © Farlex 2012

i·so·met·ric con·trac·tion

(ī'sō-met'rik kŏn-trak'shŭn)
Force development at constant length.
Compare: isotonic contraction
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Table 1 shows the peak torque (N-m) values at three isometric contractions levels (MVIC, 40% MVIC, and 80% MVIC) for the first and second weeks.
(1) Five isometric contractions of the selected movement, each lasting one second with three seconds rest (except pronation and supination: 1.8 active to 2.2 second rest)
During maximum isometric contractions in flexion and extension of the wrist (Figure 2), the strength signals were collected using a strength gauge (NTEP-87-057A3 class III, Artech, Riverside, CA).
However there are few studies which investigated effects of electrical stimulation and maximal volun-tary isometric contraction (MVIC) on isokinetic strength on literature.13 Most studies indicate that ES
McMeeken et al (2004) used an abdominal hollowing task that may allow more shortening of transversus abdominis than the isometric contraction used by Hodges et al (2003).
Gender differences in back extensor endurance capacity during isometric contraction in this study could not be linked to age influence as the participants were age matched.
One end of the aorta with endothelium was attached to a force-displacement transducer in a Magnus chamber to record its isometric contraction. The addition of PG[F.sub.2[alpha]] produced sustained contraction in the aorta.
The most commonly used PNF technique is called stretch- contract-relax, where the muscle compartment is taken to the point of stretch for 10-15 seconds, followed by an isometric contraction (provided by a partner) for 3-5 seconds, followed by 3-5 second relax period.
Isometric contraction in which pushing with the strong arm and pulling with the weak arm offset recoil.
Resistance equal to that of the patient is an isometric contraction and increases tension in the agonist muscle but without movement; this is associated with increased strength or tone of this muscle.[1] If the resistance applied is less than that of the patient, the movement will be completed but with greater effort.
Initially, we examine a model that has been used to predict the level of force during a single isometric contraction as a function of the length of the contraction.
Muscular endurance can be measured using isometric, isokinetic, or isotonic contractions by directing subjects to sustain an isometric contraction as long as possible at a force corresponding to a specified percentage of isometric strength, by performing isokinetic contractions at a set cadence until torque decreases to a specified percentage or maximum, or by performing the maximum number of isotonic contractions against a resistance set at a specified percentage of the 1-RM.