extension


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extension

 [ek-sten´shun]
1. the movement by which the two ends of any jointed part are drawn away from each other.
2. a movement bringing the members of a limb into or toward a straight condition.
Buck's extension a temporary type of lightweight traction applied to the distal end of a fractured lower limb; the foot of the bed is raised so that the body makes counterextension; often used to reduce muscle spasm.
Buck's extension.
nail extension extension exerted on the distal fragment of a fractured bone by means of a nail or pin driven into the fragment.

ex·ten·sion

(eks-ten'shŭn), [TA]
1. The act of bringing the distal portion of a joint in continuity (although only parallel) with the long axis of the proximal portion.
2. A pulling or dragging force exerted on a limb in a distal direction.
3. The movement produced by contraction of one or more extensor muscles; it generally results in the straightening of a limb; axial traction that generally lengthens a limb or straightens the trunk; the opposite or antagonistic movement of flexion.
4. Obsolete term for traction.
[L. extensus, past part. of extendere, to stretch out, extend]

extension

/ex·ten·sion/ (-shun)
1. the movement by which the two ends of any jointed part are drawn away from each other.
2. the bringing of the members of a limb into or toward a straight condition.

nail extension  extension exerted on the distal fragment of a fractured bone by means of a nail or pin (Steinmann pin) driven into the fragment.

extension

(ĭk-stĕn′shən)
n.
1.
a. The act of straightening or extending a limb.
b. The position assumed by an extended limb.
2. Medicine The application of traction to a fractured or dislocated limb to restore the normal position.

ex·ten′sion·al adj.

extension

[iksten′shən]
Etymology: L, extendere, to stretch
a "straightening" movement allowed by certain joints of the skeleton that increases the angle between two adjoining bones, such as extending the leg, which increases the posterior angle between the femur and the tibia. Compare flexion.

extension

An adult sex toy placed around an erect penis which extends its length.

extension

The making larger of a thing Imaging The broadening of a lesion–eg, a cancer or focus of infection as seen on an imaging technique Orthopedics A ↑ in the angle between parts of a joint; a straightening of a flexed limb Terminal care See Extension of life.

ex·ten·sion

(eks-ten'shŭn) [TA]
1. The act of bringing the distal portion of a joint in continuity with the long axis of the proximal portion.
2. A pulling or dragging force exerted on a limb in a distal direction.
3. To straighten a joint (i.e., the elbow is in extension when fully straightened).
[L. extensus, past part. of extendere, to stretch out, extend]

extension

Straightening at a joint. The opposite of flexion.
Figure 1: The sites of the main nerve centres and descending pathways in the brain and spinal cord that control voluntary movement, represented in diagrammatic sections.

extension

a movement at a joint that increases the joint angle, e.g. straightening the leg at the knee or the arm at the elbow, moving the hand backwards at the wrist; or one involving several joints that brings dorsal surfaces nearer together, e.g. extending the neck to tilt the head backwards or curving the spine backwards. extensor muscles those with this action, e.g. triceps acting at the elbow, quadriceps at the knee. Opposite of flexion. Figure 1.

extension

joint movement, so that dorsal aspects of adjacent body segments move towards one another (opposite to flexion)

extension,

n movement of a limb to increase the angle of the joint. Some joints (at the wrist, in the neck) are able to hyperextend.
extension, bilateral sacral,
n condition in which the sacrum has rotated around a central transverse axis so that the sacral base moves posterior relative to the bones of the pelvis. Also called
sacral base posterior.
extension, craniosacral,
n the movement of the cranial rhythmic impulse, characterized by anterior motion of the sphenobasilar symphysis and posterior motion of the sacrum.
extension, regional,
n straighten-ing of spinal region in the sagittal plane. Also called
Fryette regional extension.
extension, sacral,
n posterior movement of the sacral base relative to the hip bones.
extension, SBS,
n rotation of the occipital and sphenoid bones in opposing directions about parallel transverse axes, thus resulting in inferior positioning of the basilar portions of both bones and a decrease in the posterior convexity between them. Also called
sphenobasilar synchondrosis (symphysis) extension.
extension, unilateral sacral,
n condition involving a one-sided superior sacral shear that results in a shallow sulcus and an ipsilateral upward-forward inferolateral sacral angle.

ex·ten·sion

(eks-ten'shŭn) [TA]
1. The act of bringing the distal portion of a joint in continuity with the long axis of the proximal portion.
2. A pulling or dragging force exerted on a limb in a distal direction.
3. To straighten a joint.
[L. extensus, past part. of extendere, to stretch out, extend]

extension,

n 1. an enlargement in boundary, breadth, or depth.
n 2. the process of increasing the angle between two skeletal levers having end-to-end articulation with each other; the opposite of flexion.
extension base,
extension for prevention,
n a principle of cavity preparation promoted by G.V. Black. To prevent the recurrence of decay, he advocated extension of the preparation into an area that is readily polished and cleaned. The philosophy is no longer used in dentistry.
extension base, gingiva, attached,
n a gingival extension operation; a surgical technique designed to broaden the zone of attached gingiva by repositioning the mucogingival junction apically.
extension base, groove,
n the enlargement of a cavity preparation outline to include a developmental groove.
extension base of benefits,
n an extension of eligibility for benefits for covered services, usually designed to ensure completion of treatment commenced before the expiration date. Duration is generally expressed in terms of days.
extension base, ridge,
n an intraoral surgical operation for deepening the labial, buccal, or lingual sulci.

extension

1. the movement by which the two ends of any jointed part are drawn away from each other.
2. a movement bringing the members of a limb into or toward a straight condition.

nail extension
extension exerted on the distal fragment of a fractured bone by means of a nail or pin (Steinmann pin) driven into the fragment.
References in periodicals archive ?
If O'Neal is granted the maximum allowable extension - $24.
Chick said the city had an obligation to help Valley VOTE get an extension to make up for the signatures lost when the group was barred from the air show - perhaps as many as 15,000 signatures, the group estimates.
Some Republicans and almost all Democrats have criticized strategies that risk default and have urged adoption of a one-year extension uncluttered by additional provisions.
IRS standards to determine whether to grant extensions for certain regulatory elections that did not qualify for relief under the automatic extensions (a taxpayer had to demonstrate that it acted reasonably and in good faith and that granting the relief would not prejudice the interest of the government); and
Although the taxpayer in Boyle relied on an adviser to file an actual return, while McMahan relied on his adviser to file an extension request (which the attorney was authorized to sign), the Second Circuit refused to differentiate between these responsibilities.
Rodriguez, director of engineering and science programs at UC Irvine Extension.
It should also be noted that late-filed returns can result in "blown" elections, requiring the taxpayer to seek an extension of time for making the election under Temp.
UC Irvine Extension has been offering innovative financial planning programs since 1984," said Lori Munoz-Reiland, the director of Business Management, Corporate Education, and Information Technologies at UC Irvine Extension.
The Internal Revenue Service said that it is reconsidering its plans for an automated extension process.
COLLEYVILLE, Texas -- Anna Phillips, a certified Xtreme Lashes(TM) trainer and technician, announced today that she is opening the first dedicated semi-permanent eyelash extension salon in Texas called The Lash Lounge(TM).
93-85, the IRS concluded that the two extension periods available to foreign corporations that maintain an office or place of business within the United States are not mutually exclusive.
UC Irvine Extension is introducing new courses on Microsoft Visual Studio 2005 and Microsoft SQL Server 2005, the latest versions of these two widely used application development and database management products.