torsion

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torsion

 [tor´shun]
the act of twisting; the state of being twisted. adj., adj tor´sive.
Testicular torsion. From Copstead and Banasik, 2000.
tibial torsion inward twisting of the tibia so that the foot turns inward.

tor·sion

(tōr'shŭn),
1. A twisting or rotation of a part on its long axis or on its mesentery; often associated with compromise of the blood supply.
See also: intorsion, extorsion, dextrotorsion, levotorsion.
2. Twisting of the cut end of an artery to arrest hemorrhage.
See also: intorsion, extorsion, dextrotorsion, levotorsion.
3. Rotation of the eye around its anteroposterior axis.
See also: intorsion, extorsion, dextrotorsion, levotorsion.
[L. torsio, fr. torqueo, to twist]

tor·sion

(tōr'shŭn)
1. A twisting or rotation of a part on its long axis.
2. Twisting of the cut end of an artery to arrest hemorrhage.
3. Rotation of the eye around its anteroposterior axis.
See also: intorsion, extorsion, dextrotorsion, levotorsion
[L. torsio, fr. torqueo, to twist]

torsion

Twisting or rotation, especially of a part that hangs loosely on a narrow support. Torsion may affect a loop of bowel or other organ and commonly results in dangerous obstruction to the blood supply of the part. Urgent surgical correction may be needed.

torsion

a phenomenon occurring in embryonic gastropods in which the visceral hump rotates through 180°.

Torsion

the action of twisting
Mentioned in: Ovarian Torsion

torsion 

Rotation of an eye about an anteroposterior axis. If the upper pole of the vertical meridian of the cornea appears to rotate inward, it is called intorsion, and outward, extorsion. If the eye rotates to the right it may be called dextrotorsion and if it rotates to the left it may be called laevotorsion. It may occur as a result of a head tilt, extraocular muscle weakness or rotation of the eye to a tertiary position. Syn. cycloductin; cyclorotation; torsional movement. See Donder's law; tertiary position; incongruous hemianopia.

tor·sion

(tōr'shŭn)
1. In dentistry, twisting or rotation of tooth part on its long axis.
2. Twisting cut end of an artery to arrest hemorrhage.
[L. torsio, fr. torqueo, to twist]
References in periodicals archive ?
The patient exhibited a chin down head position and had torsional diplopia as well as V-pattern esotropia of 12 prism diopters on downgaze.
In these equations, [[tau].sub.xz] and [[tau].sub.yz] are the torsional shear stress components, whereas [[gamma].sub.xz] and [[gamma].sub.yz] are the corresponding shear strain components (Figure 1 (b)).
From all the graphs it was determined that a change of the torsional stiffness of the frame has no affect if the roll stiffness of the axles is the same ([k.sub.F] = [k.sub.R]).
The amplitude of the torsional wave can be controlled by adjusting the twisting angle of the incident bar.
Three NiTi instrument systems made of different NiTi alloy and geometries were compared for the torsional resistance.
Applying the torsional moment T on the beam's free end would force it to twist by an angle [theta], which is proportional to T by means of the torsional spring constant [k.sub.p] ([k.sub.p] = T/[theta] = GJ/L), where G = E/(2(1 + v, J, and L are the shear modulus, torsional constant, and the beam's length, respectively.
In the 4DOF torsional system the engine torque [T.sub.1] the resistance torque, [T.sub.4], are either non-autonomous or constant.
Only qualitative agreement of the potential energy surface is needed with the physical parameters, because all that matters for the accurate determination of spatial conformations is that the torsional energy minima are in the correct places.
Differences in bending and torsional moments according to gender were evaluated by t-test, and differences according to specialty were subjected to one-way analysis of variance (ANOVA).
The torsional dynamic response problem of a carbon nanotube embedded in a visco-Pasternak's medium displays various characters, and the solution becomes difficult (Zenkour [31,32]).
As the guideline developed, a need for better reciprocating compressor torsional vibration analysis guidelines was also identified.