Please enable JavaScript.

Coggle requires JavaScript to display documents.

elbow joint complex - Coggle Diagram

- - - - causes movement of distal forearm outwards
        
        laterally
        
        it poduces compression on the
        -medial aspect n
        -tensile stress on the lateral aspect
  - - - causes the movement of distal forearm inwards
        
        it produces
        -compression on medial aspect
        -& tensile stress on lateral aspect
- - - - forearm in supination
      - O of long head-superior glenoid tubercle
        short head- corocoid proces of scapula
        I- as a single tendon on the post surface
        of radial tuberosity
      - connects shoulder to elbow
    - - forearm in midprone
      - O- lat supracodylar ridge of humerus
        I- distal end of radius
      - connects elbow to wrist
    - - forearm in pronation
      - O-ant surf of lower humerus
        I- ulna tuberosity n coronoid process of ulna
- - - - Proximally
        
        just above the coronoid & radial fossa
      - distally
        
        capsule att to ulna along the margins of
        coronoid process
        & blends with the proximal border of
        annular lig
    - - proximally
        
        attached to humerus along the edge of olecranon process & back of medial epicondyle
      - distally
        
        att to posterior & interior margins of the neck of radius
    - - the capsule continues with the collateral ligaments of the elbow joint
- - - - stabilises against valgus torques at the
        medial elbow
        
        limits extension at the end of the elbow extension range of motion
        
        guides joint motion throughout flexion ROM
        
        provides some resistance to longitudinal distraction of joint surfaces
  - - - stabilises elbow against varus torques
        
        stabilises against combined varus & supination torques
        
        stabilises radial head, thus providing a stable base for rotation
        
        maintains posterolateral rotatory stability
        
        prevents subluxation of humeroulnar joint by securing ulna to humerus
        
        reinforces humeroulnar joint n helps provide some resistance to longitudinal distraction of the articulating surfaces
        
        partial dislocation
        
        radial head is the moving componant
- - - - flexor carpi radialis
        
        flexor carpi ulnaris
        
        flexor digitorum superficialis
        
        palmaris longus
        
        biceps brachii
        
        brachialis
        
        brachioradialis
        
        supinator teres
        
        pronator teres
        
        most arise frm the common flexor origin ie--- anfd they connect the humerus to the elbow and elbow to the wrist
  - - - triceps brachii
        
        anconeus
        
        extensor digitorum
        
        extensor digiti minimi
        
        extensor carpi ulnaris
        
        extensor carpi radialis longus
        
        extensor carpi radialis brevis
        
        most arise frm the common extensor origin ie ,lateral epicondyle of humerus, & they connect the humerus to the elbow and elbow to wrist
- - - - rotation of the elbow provides additional mobility for the hand
        
        many of the 16 muscles that cross the elbow complex also act at either the wrist or shoulder
        
        & therefore the wrist and shoulder are linked with the elbow in enahancing the function of the hand (cordinated movement)
- - - - is a modified hinge joint
        
        have 1 degree of freedom
        
        permits
        
        flexion
        
        extension
        
        plane- sagittal
        
        axis- coronal/x axis/AP axis
        
        side to side
        
        right/left
        
        means can move in 1 plane & 1 axis
        
        modified cos during flexion & extension there is slight side to side movement and axial rotation of ulna
    - - pivot joint
        
        1 degree of motion
        
        permits
        
        supination
        
        pronation
        
        plane- transverse plane
        
        axis- longitudinal axis
        
        upper/lower
- - - - trochlea
        
        forms HU articulation
      - capitulum
        
        forms HR articulation
      - there are 3 indentations in the humerus
        
        coronoid fossa
        
        radial fossa
        
        olecranon fossa
      - on radius
        
        head of radius
        
        articulates with capitulum of humerus
        to form the HU articulation
        
        on ulna
        
        trochlea notch
        
        articulates with the trochlea of humerus
        to form the HU articulation
    - - in full extension
        
        sliding continues
        until the olecranon process of ulna enters olecranon fossa
      - in full flexion
        
        the coronoid process reaches
        the floor of the coronoid fossa
    - - in full extension
        
        there is no contact betw radius & humerus
      - in full flexion
        
        the head of the radius enters the radial fossa