FACTOID # 8: Israel's per capita military expenditure is the highest in the world, at over $1,400 per person. Syria, still officially at war with Israel, spends $46.51 per person on its military.
 
 Home   Encyclopedia   Statistics   Countries A-Z   Flags   Maps   Education   Forum   FAQ   About 
 
WHAT'S NEW
RELATED ARTICLES
People who viewed "Patella" also viewed:
RECENT ARTICLES
More Recent Articles »
 

SEARCH ALL

FACTS & STATISTICS   

Search encyclopedia, statistics and forums:

 

 

(* = Graphable)

 

 


Encyclopedia > Patella

Bone: Patella
Knee diagram
Gray's subject #60 255
MeSH Patella

The patella or kneecap is a thick, triangular bone which articulates with the femur and covers and protects the front of the knee joint. It is the largest sesamoid bone in the human body. It is attached to the tendon of the quadriceps femoris muscle, which contracts to straighten the leg. The vastus intermedialis muscle is attached to the base of patella. The vastus lateralis and vastus medialis are attached to lateral and medial borders of patella respectively. Patella may refer to any of the following: Patella, the kneecap bone Patella, a segment of the arthropod leg Patella, a genus of limpets Boeing E-4B - kneecap - NEACP Category: ... Download high resolution version (800x729, 63 KB)Knee. ... Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... This article is about the skeletal organs. ... The femur or thigh bone is the longest, most voluminous, and strongest bone of the mammalian bodies. ... For other uses, see Knee (disambiguation). ... In anatomy, a sesamoid bone is a bone embedded within a tendon. ... A tendon (or sinew) is a tough band of fibrous connective tissue that connects muscle to bone and is built to withstand tension. ... Muscles of the iliac and anterior femoral regions. ... Diagram of an insect leg A leg is the part of an animals body that supports the rest of the animal above the ground and is used for locomotion. ... The Vastus intermedius (Crureus) arises from the front and lateral surfaces of the body of the femur in its upper two-thirds and from the lower part of the lateral intermuscular septum. ... The Vastus lateralis muscle is a muscle of the human body. ... The vastus medialis is the muscle that brings the kneecap inward, holding it in the position it should be. ...


The patella is stabilised by the insertion of vastus medialis and the prominence of the anterior femoral condyles, which prevent lateral dislocation during flexion. The retinacular fibres of the patella also stabilise it during exercise. The vastus medialis is the muscle that brings the kneecap inward, holding it in the position it should be. ...


The primary functional role of the patella is knee extension. The patella increases the leverage that the tendon can exert on the femur by increasing the angle at which it acts. For the Portuguese town and parish, see Lever, Portugal. ...


The patella ossifies between the ages 2-6 years. In some people it may be absent congenitally or hypoplastic. In 2% of the population there is a bipartite patella, which is usually asymptomatic. Ossification is the process of bone formation, in which connective tissues, such as cartilage are turned to bone or bone-like tissue. ...


Regarding non-human animals, the patella is fully developed only in placental mammals; marsupials have only rudimentary, non-ossified patellae.[1] Orders[1] Bobolestes Eomaia Maelestes Montanalestes Murtoilestes Prokennalestes Placentalia Superorder Xenarthra: Cingulata (Armadillos) Pilosa (Sloths, True Anteaters) Superorder Afrotheria: Afrosoricida (Tenrecs, etc. ...

Contents

See also

The patellar reflex or knee jerk is a monosynaptic reflex. ...

Additional images

References

  1. ^ Herzmark MH (1938). "The Evolution of the Knee Joint". J Bone Joint Surg Am 20: 77-84. Retrieved on 2007-11-17. 

Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era in the 21st century. ... 17 November is also the name of a Marxist group in Greece, coinciding with the anniversary of the Athens Polytechnic uprising. ...

External links


  Results from FactBites:
 
PATELLA (CHONDROMALACIA) (1099 words)
As the knee moves, the patella glides across the front of the knee joint in a shallow groove on the front of the femur which is known as the trochlear groove of the femur.
Each patella is tilted abnormally away from the medial side of the knee and towards the lateral side of the joint.
(152 KB avi file depicting surgical release of the lateral muscles from the patella.) This procedure is aimed at releasing the tight lateral restraints, thereby decreasing the abnormal pressure on the underside of the patella.
Luxating Patella: A Knee Problem in Dogs (920 words)
Dogs who have a luxating patella on both hind legs may change their entire posture, by dropping their hindquarters and holding the rear legs farther out from the body as they walk.
When the patella luxates from the groove of the femur, it usually cannot return to its normal position until the quadriceps muscle relaxes and increases in length.
While the muscles are contracted and the patella is luxated from its correct position, the joint is held in the flexed or bent position.
  More results at FactBites »

 

COMMENTARY     


Share your thoughts, questions and commentary here
Your name
Your location
Your comments
Please enter the 5-letter protection code


Lesson Plans | Student Area | Student FAQ | Reviews | Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms.