Joint, elbow
Three long bones meet in the middle portion of the arm at the elbow joint. The bone of the upper arm (humerus) meets both the ulna (the inner bone of the forearm) and radius (the outer bone of the forearm) to form a hinge joint. And the radius and ulna also meet one another in the elbow to permit a small amount of rotation of the forearm. The elbow therefore functions to move the arm like a hinge (forward and backward) and in rotation (turn outwards and inwards). The biceps muscle is the major muscle that flexes (bends) the elbow hinge while the triceps muscle is the major muscle that extends (straightens) it. The primary stability of the elbow is provided by the ulnar collateral ligament located on the medial (inner) side of the elbow. The outer bony prominence of the elbow is the lateral epicondyle, a part of the humerus bone. Tendons attached to this area can be injured, causing inflammation or tendinitis — lateral epicondylitis, or "tennis elbow". The inner portion of the elbow is a bony prominence called the medial epicondyle of the humerus. Additional tendons from muscles attach here and can be injured, likewise causing inflammation or tendinitis — medial epicondylitis, or "golfer's elbow".

Medical dictionary. 2011.

Look at other dictionaries:

  • Elbow — El bow, n. [AS. elboga, elnboga (akin to D. elleboga, OHG. elinbogo, G. ellbogen, ellenbogen, Icel. ?lnbogi; prop.; arm bend); eln ell (orig., forearm) + boga a bending. See 1st {Ell}, and 4th {Bow}.] 1. The joint or bend of the arm; the outer… …   The Collaborative International Dictionary of English

  • Elbow grease — Elbow El bow, n. [AS. elboga, elnboga (akin to D. elleboga, OHG. elinbogo, G. ellbogen, ellenbogen, Icel. ?lnbogi; prop.; arm bend); eln ell (orig., forearm) + boga a bending. See 1st {Ell}, and 4th {Bow}.] 1. The joint or bend of the arm; the… …   The Collaborative International Dictionary of English

  • Elbow in the hawse — Elbow El bow, n. [AS. elboga, elnboga (akin to D. elleboga, OHG. elinbogo, G. ellbogen, ellenbogen, Icel. ?lnbogi; prop.; arm bend); eln ell (orig., forearm) + boga a bending. See 1st {Ell}, and 4th {Bow}.] 1. The joint or bend of the arm; the… …   The Collaborative International Dictionary of English

  • Elbow scissors — Elbow El bow, n. [AS. elboga, elnboga (akin to D. elleboga, OHG. elinbogo, G. ellbogen, ellenbogen, Icel. ?lnbogi; prop.; arm bend); eln ell (orig., forearm) + boga a bending. See 1st {Ell}, and 4th {Bow}.] 1. The joint or bend of the arm; the… …   The Collaborative International Dictionary of English

  • Joint dislocation — Classification and external resources A traumatic dislocation of the tibiotalar joint of the ankle with distal fibular fracture. Open arrow marks the tibia and the closed arrow marks the talus. ICD …   Wikipedia

  • elbow — [el′bō΄] n. [ME elbowe < OE elboga < PGmc * alino boga (> Ger ellenbogen): see ELL2 & BOW2] 1. a) the joint between the upper and lower arm; esp., the outer part of the angle made by a bent arm b) the joint corresponding to this in the… …   English World dictionary

  • elbow — ► NOUN 1) the joint between the forearm and the upper arm. 2) a piece of piping or something similar bent through an angle. ► VERB 1) strike with one s elbow. 2) push roughly away. 3) (often elbow one s way) move by pushing past people with one s …   English terms dictionary

  • joint — joint, articulation, suture denote a place where two things are united or the mechanism by which they are united. Joint is the most inclusive of these terms and is freely usable in reference both to anatomical and mechanical structures. In… …   New Dictionary of Synonyms

  • Joint stiffness — Classification and external resources ICD 10 M25.6 ICD 9 719.5 Joint stiffness may be either th …   Wikipedia

  • Joint constraints — are rotational constraints on the joints of an artificial bone system. They are used in an inverse kinematics chain, for such things as 3D animation or robotics. Joint constraints can be implemented in a number of ways, but the most common method …   Wikipedia

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