anterior cruciate ligament

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an·te·ri·or cru·ci·ate lig·a·ment

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.


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 ?
Anterior Cruciate Ligament rupture is a widely seen injury and develops due to sport and daily activities.
A comparison of the doubled semi-tendinosus/gracilis and central third of the patellar tendon autografts in arthroscopic anterior cruciate ligament reconstruction.
Closed kinetic chain alone compared to combined open and closed kinetic chain exercises for quadriceps strengthening after anterior cruciate ligament reconstruction with respect to return to sports: a prospective matched follow-up study.
Thermal modification of partial tears of the anterior cruciate ligament.
For instance, data from NCAA injury reports found female soccer and basketball players were three to four times more likely to rupture their anterior cruciate ligaments than their male counterparts.
The MRI scan report has confirmed what we suspected, which is that Rhys has sustained an injury to the anterior cruciate ligament," Ospreys head physiotherapist Chris Towers said.
We believe that MRI can be used to assess the size of patella and hamstring tendons when evaluating a patient for potential autograft harvesting prior to anterior cruciate ligament reconstruction.
Anterior Cruciate ligament damage adversely affects the stability of the knee, making further injury to the cartilage more likely.
In the past decade, estimates quote the annual incidence of anterior cruciate ligament (ACL) injury as nearly 1 in every 3000 people in the United States.
An MRI exam Tuesday on Clippers' point guard Shaun Livingston's dislocated left knee revealed tears to the anterior cruciate ligament, posterior cruciate ligament, medial collateral ligament and lateral meniscus.
According to Martha Murray, MD, who is spearheading the clinic, "More than 200,000 Americans suffer tears to the Anterior Cruciate Ligament (ACL) every year.
The anterior cruciate ligament (ACL) is the most commonly disrupted and reconstructed ligament in the knee, with an annual incidence of roughly 200,000 new injuries and approximately 100,000 graft reconstructions.

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