anterior cruciate ligament

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an·te·ri·or cru·ci·ate lig·a·ment

[TA]
the ligament that extends from the anterior intercondylar area of the tibia to the posterior part of the medial surface of the lateral condyle of the femur.

anterior cruciate ligament (ACL)

a strong band that arises from the posterior middle part of the lateral condyle of the femur, passes anteriorly and inferiorly between the condyles, and is attached to the depression in front of the intercondylar eminence of the tibia. The ACL is often injured in athletic activity and is the main control for rotation of the knee.

an·te·ri·or cru·ci·ate lig·a·ment

(an-tēr'ē-ŏr krū'shē-ăt lig'ă-mĕnt) [TA]
The ligament that extends from the anterior intercondylar area of the tibia to the posterior part of the medial surface of the lateral condyle of the femur.
Synonym(s): ligamentum cruciatum anterius [TA] .

cruciate ligaments

two intracapsular ligaments of the knee, forming an X-shape, linking the femur to the tibia, strong but not elastic, which are crucial for the stability of the knee joint. The anterior cruciate ligament runs upwards, backwards and laterally from the front of the upper end of the tibia to attach to the medial aspect of the lateral femoral condyle; it limits forward movement of the tibia relative to the femur and tightens with extension at the knee. It is short and thick with a poor blood supply. The posterior cruciate ligament arises from the posterior intercondylar area of the tibia and runs forwards, upwards and medially to attach to the anterolateral surface of the medial femoral condyle. It limits backwards movement of the tibia relative to the femur and tightens with flexion at the knee. cruciate ligament injury (especially anterior) can result in a rapid accumulation of blood in the knee joint (haemarthrosis) and is often associated with damage to other structures, especially the medial meniscus. Treatment depends on the sport involved, the degree of instability and of other damage. In sportspeople complete rupture usually requires surgical repair, resulting in a lengthy (up to 9 months) rehabilitation programme, before return to sport. Disruption of only the posterior ligament may result in significant instability but may be hard to diagnose clinically. See also drawer sign, Lachman test.

anterior

situated at or directed toward the front; opposite of posterior. In quadrupeds the use of the term is limited to parts of the head but is often used to mean cranially. In bipeds such as humans it is synonymous with ventral.

anterior abdomen pain
elicited pain in the anterior abdomen caused, in cattle, by reticulitis, hepatic or splenic abscess, abomasal ulcer and intestinal obstruction.
anterior chamber
the part of the eyeball between the cornea and the iris, filled with aqueous humor.
anterior chamber angle
see iridocorneal angle.
anterior compartment
chamber of the eye bounded by the iris and cornea; contains the aqueous humor as it moves to the filtration angle; called also anterior chamber.
anterior cruciate ligament
see cranial (anterior) cruciate ligament.
anterior (cranial) drawer sign
cranial, nonrotary movement of the proximal tibia in relation to the distal femur. Normally restricted by the cranial (anterior) cruciate ligament and used as a diagnostic test for rupture of that structure.
anterior epithelial layer
of the cornea is a noncornified, stratified, squamous epithelium, continuous with the bulbar conjunctival epithelium.
anterior functional stenosis
achalasia of the reticulo-omasal sphincter causing ingesta to accumulate in the reticulorumen.
anterior limiting membrane
of the cornea is a combination of the basement membrane, a felted layer of fine collagen fibers; substantial only in primates.
anterior pituitary
anterior pituitary hormones
anterior station trypanosomes
a section of the genus Trypanosoma in which the infectious stages accumulate in the mouthparts and salivary glands of the intermediate host so that the parasite is transmitted when the insect vector takes a blood meal. Called also Salivaria. See also posterior station trypanosomes.
anterior vena cava
see vena cava.
References in periodicals archive ?
It is a familiar tale of woe for the Yardley youngster, who had long lays-offs after damaging his anterior crucial ligament in December 2009, again in August 2012 and missed the start of the current campaign with back trouble.
In this study, we use both macro and micro MRI (20cm and 9cm magnets respectively) to image the anterior crucial ligament (ACL) transected cartilage, based on a molecular level MRI marker, T2 relaxation.
The Brazil international damaged the anterior crucial ligament in his left knee during Tuesday's 2-0 victory over Chelsea in the Carling Cup quarter-final at Stamford Bridge.
The 26-year-old ruptured his anterior crucial ligament just over a minute into England's final World Cup game against Sweden, and when he realised the severity of the injury his first reaction was one of guilt.
The 26-year-old ruptured his anterior crucial ligament just over a minute into England's final World Cup group game against Sweden, and when he realised the severity of the injury his first reaction was one of guilt.

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