cocontraction

co·con·trac·tion

(kō'kŏn-trak'shŭn)
Simultaneous contraction of both the agonist and the antagonist around a joint to hold a stable position.

cocontraction

(kō″kŏn-trăk′shŭn)
A condition in which muscles around a joint or the spinal column contract simultaneously to provide stability.
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References in periodicals archive ?
(2000) Cost-benefit of muscle cocontraction in protecting against spinal instability.
The effect of cocontraction of the masticatory muscles during neck stabilization exercises on thickness of the neck flexors.
Knee extension and flexion weakness in people with knee osteoarthritis: Is antagonist cocontraction a factor?
Dystonia is a motor disorder characterized by sustained involuntary muscular contractions resulting from cocontraction of antagonistic muscles and overflow into extraneous muscles [1].
Foot drop can be caused by peripheral muscle weakness of the dorsiflexor muscles, increased tone of the plantar flexor muscles, or impaired neural control causing cocontraction of agonist and antagonist muscles [6].
We used an index of muscle cocontraction around the joint (IMCJ) instead of stiffness.
Based on previous studies, we concluded that (1) the relationship between the ankle joint activity and the risk of injury was insignificant, while the joint angular velocity is positively related to the risk of injury [7, 8, 13]; (2) compared with women, men were more adept at using the ankle dorsiflexor and had better explosive strength and cocontraction of the ankle plantarflexor and dorsiflexor, and then, these factors induced the higher injury rate for women [8, 9]; and (3) the ankle brace significantly improved GRF and the muscle forces and enhanced the proprioception of the lower limbs [9, 10].
Later, other "positive" signs appear: muscle hyperactivity; spasticity; hyper-reflection; atetosis; spastic dystonia; clonus (series of fast involuntary contractions); cocontraction; abnormal posture, contractures (permanent contraction of the muscle and tendon due to severe persistent stiffness and spasms) and bone and joint deformities.
Cocontraction switching is commonly used for switching between functions or prehensile types in multiarticulated hand systems or powered transhumeral prostheses.
Potvin, "Constraining spine stability levels in an optimization model leads to the prediction of trunk muscle cocontraction and improved spine compression force estimates," Journal of Biomechanics, vol.
First of all, the tremulous neural drive may be subtle and obscured by substantial simultaneous voluntary and/or involuntary cocontraction of several antagonistic muscles, which may stabilize the controlled joint and, thus, mask the tremor component of movement.
Dystonia is a movement disorder that is caused by sustained or intermittent cocontraction of agonist-antagonist muscle groups leading to abnormal posturing and repetitive movement.