eccentric contraction


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Related to eccentric contraction: Isotonic 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.

eccentric contraction

controlled relaxation of a contracted muscle, movement occurring as a result of the lengthening of the muscle(s).

eccentric contraction

a type of muscle contraction that occurs as the muscle fibers lengthen, such as when a weight is lowered through a range of motion. The contractile force generated by the muscle is weaker than an opposing force, which causes the muscle to stretch. Compare concentric contraction.

eccentric contraction

Negative contraction Sports medicine Muscle contraction that occurs while the muscle is lengthening as it develops tension and contracts to control motion by an outside force. Cf Concentric contraction.

ec·cen·tric con·trac·tion

(ek-sen'trik kŏn-trak'shŭn)
A lengthening action in which a muscle's attachments are drawn away from one another by an external resistance, even though the muscle is activated. Often called negative work.
See also: concentric contraction
References in periodicals archive ?
Specifically, increased quadriceps activity was observed during single-support phases for power absorption, signifying the presence of eccentric contractions [12], while the relative duration of knee flexor activation was reduced compared with level walking [11].
Inter--and intraday consistency was evaluated for eccentric contraction of the shoulder abductors at 60 [degrees]/s with the Cybex (Lumex, Ronkonkoma, New York).
Without this eccentric contraction, the weight would come down directly upon the chest.
2007) only stimulated the vastus lateralis and induced eccentric contractions whereas Mackey at al.
Moreover, a study with mice (Widrick and Baker, 2006) reported decreased power in an isolated muscle after an eccentric contraction series due to a loss in strength and a slower muscle shortening speed.
8) PT/BW, Peak torque/Body weight; Work/BW, Work/Body weight; conc, concentric contraction; ecc, eccentric contraction * Indicates significant difference between patellar tendinopathy and control groups (p < 0.
The low plasma CK response of the present study may reflect a limited eccentric contraction component of the ER and NM exercise bouts.
To perform stepping up/over, it was essential to have skilled control of weight shifting between limbs and to have sufficient muscle strength in concentric and eccentric contractions.
One second after the onset of stimulation, forced isokinetic dorsi-flexion was given to the ankle joint to cause an eccentric contraction of the triceps surae muscle.
Many previous studies have demonstrated that there are neurophysiological differences between eccentric contraction and other styles of muscle contraction, such as concentric and isometric contraction (McHugh et al.
Moreover, eccentric contraction of the muscles attaching to the first rib is also considered to be one of the etiology of first rib stress fracture (Coris and Higgins, 2005; Matsumoto et al.
Three other tricks to accentuate muscle gains, be safer, and potentially repair damaged joints include training to failure, slow-motion weight lifting, and eccentric contractions.