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E LBOW JOINT AND RADIO - ULNAR JOINTS D R P K S HARMA
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E LBOW JOINT Two articulations – 1. Humero-ulnar 2. Humero-radial the complexity of elbow joint is increased by its continuity with superior radio ulnar joint. humero-radial + humero-ulnar = cubital articulation + superior radioulnar
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TYPE OF JOINT - synovial joint - hinge variety - compound - typical
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A RTICULAR SURFACES Capitulum and trochlea of the lower end of humerus Upper surface of head of radius and trochlear notch of ulna
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L IGAMENTS
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RELATIONS
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B URSAE RELATED TO ELBOW JOINT 1. Subtendinous olecranon bursa 2. Subcutaneous olecranon bursa 3. Bicipitoradial bursa 4. Bursa separating biceps tendon from oblique cord
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S TABILITY OF ELBOW JOINT 1. Trochlea of humerus fits into trochlear notch of ulna 2. Ulnar collateral ligament 3. Radial collateral ligament
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B LOOD SUPPLY -brachial artery -radial artery -ulnar artery Anastomosis around elbow joint
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N ERVE SUPPLY Articular branches from - radial nerve - musculocutaneous nerve - ulnar nerve - median nerve
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C ARRYING ANGLE
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APPLIED Posterior dislocation of elbow
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GOLFER’S ELBOW (Medial epicondylitis)
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T ENNIS ELBOW ( Lateral epicondylitis)
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P ULLED ELBOW
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S TUDENT ’ S ELBOW
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D ISTENSION ( EFFUSION ) OF ELBOW JOINT
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Nerve entrapment - median nerve - ulnar nerve -posterior interosseous nerve
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R ADIO ULNAR JOINTS Superior radioulnar joint Middle (interosseous) radioulnar joint Inferior radioulnar joint
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A RTICULAR SURFACES Circumference of radial head Fibro-osseous ring made by radial notch of ulna and annular ligaments
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B LOOD SUPPLY
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S UPINATION AND PRONATION
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M USCLES PRODUCING SUPINATION AND PRONATION Supination -supinator biceps brachii brachioradialis Pronation -pronator teres pronator quadratus brachioradialis
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MULTIPLE C HOICE QUESTIONS 1. Flexors of elbow joint are a)Biceps b) Brachialis c) Brachioradialis d) All of the above
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2) Elbow joint is a type of a) Hinge joint b) Pivot joint c) Condylar joint d) Ellipsoid joint
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3) Inferior radioulnar joint is a type of a)Hinge joint b)Pivot joint c)Condylar joint d)Ellipsoid joint
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4) Olecrenon bursitis is also called as a) Golfer’s elbow b) Student’s elbow c) Tennis elbow d) Pulled elbow elbow
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5) The triangular relationship between the olecranon and the epicondyles of humerus is lost in a)Supracondylar fracture of humerus b)Student’s elbow c)Synovitis of elbow d)Posterior dislocation of elbow
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Thank you
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